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DIN 7603 A Sealing Ring Washers (Form A)

DIN 7603 form A sealing rings — bonded metal-and-elastomer washers in sizes Φ4 ×8 to Φ90 ×100, the self-centering sealing washer that closes the bolt hole against oils and fuels, with the collected bore/OD/shell/lip ladder and per-material kg/1000 figures.

Last updated: 2026-11

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DIN 7603 A Sealing Ring Washers (Form A) in an industrial setting
Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

DIN 7603 form A is the bonded sealing ring: a metal carrier ring with a bonded elastomer sealing lip that squeezes between the bolt head (or nut) and the housing face, closing the clearance around the shank so oil, fuel or coolant cannot wick out along the thread. Form A is the flat form of the standard — the companion form C carries a raised lip for counterbored seats. The collected ladder runs the source's size naming Φd ×dc (bore × outside diameter) from Φ4 ×8 to Φ90 ×100, covering fasteners from M4 up to M90, and tabulates per size: bore min/max, outside diameter min/max, the metal-shell thickness H with its material legend "Al,St,Cu,Vf,Zn" (aluminium, steel, copper, Vf and Zn variants), the elastomer layer thicknesses FA and Prg and the Pr lip, and a ±25% kg/1000 mass split per material. The Zn mass row prints "-" at most sizes in the source — carried verbatim, so quote Zn-variant masses per RFQ. Sealing duty, not structure: pick the size by the fastener's nominal diameter and the housing seat from this table, and state the medium (oil, fuel, coolant, air) when requesting material and elastomer confirmation — the compound specification is not tabulated by the collected source and stays per RFQ.

Standard DIN 7603 form A — sealing rings, flat form (bonded metal/elastomer)
Size range Φ4 ×8 – Φ90 ×100 in the source's "Φd ×dc" (bore × outside diameter) notation, fasteners M4 – M90
Bore diameter d: min = nominal size, max per size (e.g. Φ12: 12.5)
Outside diameter dc: max = nominal size per the size token, min/max rows per size
Shell thickness H per material legend Al,St,Cu,Vf,Zn: 1 – 2.5 mm nominal
Elastomer layers FA and Prg layer thicknesses and Pr lip per size (0.3 – 2 mm nominal)
Weight kg/1000 pcs ±25% per material (FA/Vf/Prg/Pr/Al/St/Cu/Zn) carried verbatim
Elastomer compound / finish Not tabulated by the collected specification — per RFQ (name the sealed medium and temperature)
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ4 ×8 - Φ5.5 ×8)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ4 ×8Φ5 ×7.5Φ5.5 ×8
d — min=nominal size4.25.25.7
max4.55.56
dc — max=nominal size7.97.47.9
min7.77.27.7
H — Al,St,Cu,Vf,Zn — Nominal Size111
max1.21.21.2
min0.80.80.8
FA — Nominal Size111
max1.21.21.2
min0.80.80.8
Prg — Nominal Size0.50.50.5
max0.60.60.6
min0.40.40.4
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.0660.0390.043
Vf0.0360.0220.024
Prg0.0170.010.011
Pr0.010.0060.007
Al0.0890.0530.058
St0.2590.1550.168
Cu0.2940.1760.191
Zn---
  • Row 22 (Zn): The Zn (zinc) mass row prints "-" (no tabulated value) at these sizes while the other material rows carry values — carried verbatim, not read across; the "-" pattern repeats through the ladder with isolated Zn values at a few sizes.
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ6.5 ×9.5 - Φ8 ×11.5)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ6.5 ×9.5Φ7 ×15Φ8 ×11.5
d — min=nominal size6.77.28.2
max77.58.5
dc — max=nominal size9.414.911.4
min9.214.711.2
H — Al,St,Cu,Vf,Zn — Nominal Size11.51
max1.21.71.2
min0.81.30.8
FA — Nominal Size111
max1.21.21.2
min0.80.80.8
Prg — Nominal Size0.50.50.5
max0.60.60.6
min0.40.40.4
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.0630.3730.092
Vf0.0350.2280.051
Prg0.0160.1130.023
Pr0.010.0690.014
Al0.0850.5590.124
St0.2471.6250.362
Cu0.281.8420.412
Zn-1.478-
  • Row 1 (d — min=nominal size): The size naming "Φd ×dc" is the source's own and is not monotonic in dc (Φ5 ×7.5 sits between Φ4 ×8 and Φ5.5 ×8) — the outside diameter is part of the size designation, so order by the drawn size token.
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ10 ×13.5 - Φ12 ×16)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ10 ×13.5Φ12 ×15.5Φ12 ×16
d — min=nominal size10.212.212.2
max10.512.512.5
dc — max=nominal size13.415.415.9
min13.215.215.7
H — Al,St,Cu,Vf,Zn — Nominal Size11.51.5
max1.21.71.7
min0.81.31.3
FA — Nominal Size11.51.5
max1.21.651.65
min0.81.351.35
Prg — Nominal Size0.50.50.5
max0.60.60.6
min0.40.40.4
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.1110.1950.23
Vf0.0620.1070.126
Prg0.0280.0330.038
Pr0.0170.020.023
Al0.150.2640.311
St0.4350.7670.905
Cu0.4931.871.03
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ12 ×19 - Φ14 ×20)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ12 ×19Φ14 ×18Φ14 ×20
d — min=nominal size12.214.214.2
max12.514.514.5
dc — max=nominal size18.917.919.9
min18.717.719.7
H — Al,St,Cu,Vf,Zn — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
FA — Nominal Size1.51.51.5
max1.651.651.65
min1.351.351.35
Prg — Nominal Size0.50.50.5
max0.60.60.6
min0.40.40.4
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.4610.2640.44
Vf0.2820.1450.242
Prg0.1390.0450.074
Pr0.0850.0270.044
Al0.6910.3560.595
St2.011.031.73
Cu2.281.171.96
Zn1.828-1.71
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ15 ×19 - Φ16 ×20)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ15 ×19Φ15 ×23Φ16 ×20
d — min=nominal size15.215.216.2
max15.515.516.5
dc — max=nominal size18.922.919.9
min18.722.719.7
H — Al,St,Cu,Vf,Zn — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
FA — Nominal Size1.51.51.5
max1.651.651.65
min1.351.351.35
Prg — Nominal Size0.50.50.5
max0.60.60.6
min0.40.40.4
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.280.6440.3
Vf0.1540.3940.165
Prg0.0470.1950.05
Pr0.0280.1190.03
Al0.3780.9670.403
St1.12.811.179
Cu1.253.191.33
Zn-2.556-
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ17 ×21 - Φ20 ×24)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ17 ×21Φ18 ×22Φ20 ×24
d — min=nominal size17.218.220.2
max17.518.520.5
dc — max=nominal size20.921.923.9
min20.721.723.7
H — Al,St,Cu,Vf,Zn — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
FA — Nominal Size1.51.51.5
max1.651.651.65
min1.351.351.35
Prg — Nominal Size0.50.50.5
max0.60.60.6
min0.40.40.4
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.320.3280.36
Vf0.1760.180.198
Prg0.0530.0550.06
Pr0.0320.0330.036
Al0.4330.4440.488
St1.261.291.42
Cu1.431.461.16
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ21 ×26 - Φ23 ×28)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ21 ×26Φ22 ×27Φ23 ×28
d — min=nominal size21.222.223.3
max21.522.523.6
dc — max=nominal size25.926.927.9
min25.726.727.7
H — Al,St,Cu,Vf,Zn — Nominal Size1.51.52
max1.71.72.2
min1.31.31.8
FA — Nominal Size1.51.52
max1.651.652.2
min1.351.351.8
Prg — Nominal Size0.50.51
max0.60.61.15
min0.40.40.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.50.5220.705
Vf0.2750.2880.386
Prg0.0830.0870.177
Pr0.050.0520.054
Al0.6750.7050.95
St1.962.052.77
Cu2.222.323.24
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ24 ×29 - Φ26 ×31)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ24 ×29Φ25 ×30Φ26 ×31
d — min=nominal size24.325.326.3
max24.625.626.6
dc — max=nominal size28.929.930.9
min28.729.730.7
H — Al,St,Cu,Vf,Zn — Nominal Size222
max2.22.22.2
min1.81.81.8
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size111
max1.151.151.15
min0.850.850.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.7330.7650.793
Vf0.4030.4220.435
Prg0.1840.190.197
Pr0.0550.0570.059
Al0.991.031.07
St2.882.993.1
Cu3.263.43.51
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ27 ×32 - Φ30 ×36)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ27 ×32Φ28 ×33Φ30 ×36
d — min=nominal size27.328.330.3
max27.628.630.6
dc — max=nominal size31.932.935.9
min31.732.735.7
H — Al,St,Cu,Vf,Zn — Nominal Size222
max2.22.22.2
min1.81.81.8
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size111
max1.151.151.15
min0.850.850.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA0.8150.8451.13
Vf0.450.4630.62
Prg0.2040.2120.28
Pr0.0620.0640.084
Al1.11.141.52
St3.213.314.41
Cu3.643.755
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ32 ×38 - Φ35 ×41)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ32 ×38Φ33 ×39Φ35 ×41
d — min=nominal size32.333.335.3
max32.633.635.6
dc — max=nominal size37.938.940.9
min37.738.740.7
H — Al,St,Cu,Vf,Zn — Nominal Size222
max2.22.22.2
min1.81.81.8
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size111
max1.151.151.15
min0.850.850.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA1.21.241.3
Vf0.6550.6730.713
Prg0.2980.3050.323
Pr0.090.0920.097
Al1.61.651.74
St4.664.85.07
Cu5.275.445.73
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ36 ×42 - Φ39 ×46)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ36 ×42Φ38 ×44Φ39 ×46
d — min=nominal size36.338.339.3
max36.638.639.6
dc — max=nominal size41.943.945.9
min41.743.745.7
H — Al,St,Cu,Vf,Zn — Nominal Size222
max2.22.22.2
min1.81.81.8
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size111
max1.151.151.15
min0.850.850.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA1.341.411.74
Vf0.7320.7670.943
Prg0.3320.3480.428
Pr0.10.1040.128
Al1.791.882.32
St5.25.476.73
Cu5.886.156.96
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ40 ×47 - Φ44 ×51)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ40 ×47Φ42 ×49Φ44 ×51
d — min=nominal size40.342.344.3
max40.642.644.6
dc — max=nominal size46.948.950.9
min46.748.750.7
H — Al,St,Cu,Vf,Zn — Nominal Size222
max2.22.22.2
min1.81.81.8
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size111
max1.151.151.15
min0.850.850.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA1.761.831.91
Vf0.9661.021.06
Prg0.4380.4570.478
Pr0.1320.1380.144
Al2.372.472.58
St6.887.27.5
Cu7.88.158.5
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ45 ×52 - Φ50 ×57)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ45 ×52Φ48 ×55Φ50 ×57
d — min=nominal size45.348.350.2
max45.648.650.5
dc — max=nominal size51.954.956.9
min51.754.756.7
H — Al,St,Cu,Vf,Zn — Nominal Size222
max2.22.22.2
min1.81.81.8
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size111
max1.151.151.15
min0.850.850.85
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA1.952.072.15
Vf1.081.141.18
Prg0.4790.5180.54
Pr0.1440.1560.162
Al2.642.82.9
St7.678.158.45
Cu8.689.239.56
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ52 ×60 - Φ55 ×63)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ52 ×60Φ54 ×62Φ55 ×63
d — min=nominal size52.554.555.5
max535556
dc — max=nominal size59.861.862.8
min59.561.562.5
H — Al,St,Cu,Vf,Zn — Nominal Size2.52.52.5
max2.72.72.7
min2.32.32.3
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA2.933.11
Vf1.61.671.72
Prg0.870.90.93
Pr0.1740.180.186
Al3.854.064.2
St11.411.812.2
Cu12.913.413.8
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ56 ×64 - Φ60 ×68)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ56 ×64Φ58 ×66Φ60 ×68
d — min=nominal size56.558.560.5
max575961
dc — max=nominal size63.865.867.8
min63.565.567.5
H — Al,St,Cu,Vf,Zn — Nominal Size2.52.52.5
max2.72.72.7
min2.32.32.3
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA3.143.223.32
Vf1.751.771.83
Prg0.9420.9651
Pr0.1870.1930.2
Al4.34.354.48
St12.312.613
Cu13.9514.314.8
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ64 ×72 - Φ70 ×79)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ64 ×72Φ65 ×74Φ70 ×79
d — min=nominal size64.565.570.5
max656671
dc — max=nominal size71.873.878.8
min71.573.578.5
H — Al,St,Cu,Vf,Zn — Nominal Size2.52.52.5
max2.72.72.7
min2.32.32.3
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA3.523.584.68
Vf1.941.972.58
Prg1.051.071.4
Pr0.2130.2140.28
Al4.84.836.35
St13.851418.4
Cu15.715.920.9
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ75 ×84 - Φ80 ×90)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ75 ×84Φ78 ×88Φ80 ×90
d — min=nominal size75.578.580.7
max767981.2
dc — max=nominal size83.887.889.8
min83.587.589.5
H — Al,St,Cu,Vf,Zn — Nominal Size2.52.52.5
max2.72.72.7
min2.32.32.3
FA — Nominal Size222
max2.22.22.2
min1.81.81.8
Prg — Nominal Size1.51.51.5
max1.71.71.7
min1.31.31.3
Pr0.30.30.3
per 1000 units≈kg — ±25% — FA55.865.95
Vf2.763.223.25
Prg1.51.761.79
Pr0.30.3520.358
Al6.757.98
St19.62323.1
Cu22.326.126.3
Zn---
DIN 7603 A sealing ring washers, form A - attribute rows per size (Φ85 ×95 - Φ90 ×100)All dimensions in millimetres. Column headings are the source's size naming "Φd ×dc" (bore × outside diameter), carried verbatim. Attribute labels: d = bore (min=nominal size/max); dc = outside diameter (max=nominal size/min); H = metal-shell thickness per material legend "Al,St,Cu,Vf,Zn"; FA / Prg = rubber-layer thicknesses; Pr = rubber-Pr thickness (each Nominal Size/max/min); the mass rows are the source's "per 1000 units≈kg ±25%" split by material (FA/Vf/Prg/Pr/Al/St/Cu/Zn).
SizeΦ85 ×95Φ90 ×100
d — min=nominal size85.790.7
max86.291.2
dc — max=nominal size94.899.8
min94.599.5
H — Al,St,Cu,Vf,Zn — Nominal Size2.52.5
max2.72.7
min2.32.3
FA — Nominal Size22
max2.22.2
min1.81.8
Prg — Nominal Size1.51.5
max1.71.7
min1.31.3
Pr0.30.3
per 1000 units≈kg — ±25% — FA6.256.61
Vf3.433.63
Prg1.882
Pr0.3760.4
Al8.458.95
St24.525.9
Cu27.829.5
Zn--

Materials

  • Carrier material per the source legend: aluminium, steel, copper, Vf or Zn; elastomer compound per RFQ — state the sealed medium, pressure and temperature so the compound (NBR, FKM and similar) is confirmed at quotation

Ordering & documentation

Documents

Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.

Quotation

  • The fastener family (DIN 7603 A Sealing Ring Washers (Form A)) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
  • Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
  • Quantity per size and your target delivery date.
  • Destination country, and any required documents (for example a mill test certificate) so the quote includes them.

Sample & supply

Minimum order quantity is 10,000 pieces. Stock items run 3–7 days. Quantities or variants outside the standard range are confirmed at quotation.

Storage & shipping

Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.

Frequently asked questions

Form A or form C — which DIN 7603 ring does my seat need?

By the housing face. Form A is the flat sealing ring: it seals flat, unrelieved faces under a bolt head or nut, where the elastomer lip bears the whole seat. Form C is the stepped form for counterbored or recessed seats — its profile reaches into the recess while the metal ring bridges it, and comparing the two ladders in this catalog shows it in the geometry: form C carries a metal-sheet thickness row (e) and a single lip height h per material legend "AlFA,CuFA,StFA", while form A tabulates two elastomer layers (FA, Prg) plus the Pr lip on a wider material legend. Both share the same ordering key — the fastener's nominal diameter sets the bore, the seat sets the dc token — and the same fail-closed line: neither collected table names the elastomer compound or its temperature limits, so the medium and duty go on the RFQ.

Related knowledge

Request a Quote

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What to include in your inquiry

  • ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
  • ✓ Sizes, lengths and thread type (metric or inch).
  • ✓ Quantity per size and your target delivery date.
  • ✓ Destination country, plus any coating or finish requirement.
  • ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
  • ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
  • ✓ Factory-direct pricing
  • ✓ Standard and custom specifications
  • ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
  • ✓ Full fastener family support

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