IndFastPro Industrial Fasteners Manufacturer
Get a Quote
English
English English Deutsch German Français French Español Spanish Italiano Italian Português Portuguese Nederlands Dutch Polski Polish Türkçe Turkish Русский Russian 日本語 Japanese 한국어 Korean العربية Arabic Tiếng Việt Vietnamese 繁體中文 Traditional Chinese

DIN 939 Double-End Studs (Screwed-In End ≈ 1.25 d)

Double-end metric studs to DIN 939 — the screwed-in end at approximately 1.25 × thread diameter, nut-end thread length tabulated by grip L through (M52), with the collected coarse/fine/very-fine pitch ladder M4 to (M52).

Last updated: 2026-11

Request a Quote

DIN 939 Double-End Studs (Screwed-In End ≈ 1.25 d) in an industrial setting
Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

DIN 939 is the middle engagement of the double-end stud trio — screwed-in end ≈ 1.25 d (the collected b 1 row runs 5 mm at M4 to 65 mm at (M52)) — and is the most commonly drawn of the three for general machinery: enough engaged thread to hold in a standard tapping practice, without the stud standing off the housing. The collected ladder splits the pitch rows into coarse, fine and very fine variants per size, so a drawing calling an M12×1.25 or M12 fine stud resolves directly off the table. The nut end carries the grip-based engagement rows (L≤125 / 125＜L≤200 / L＞200), and the ladder runs to (M52). For the shorter and longer screwed-in ends see the DIN 938 and DIN 835 pages in this catalog. Material, property class and finish are not printed by the collected specification — per RFQ.

Standard DIN 939 — double-end studs, screwed-in end ≈ 1.25 d
Size range M4 – (M52), parenthesised sizes non-preferred per the source notation
Screwed-in end b 1: 5 – 65 mm across the ladder (≈ 1.25 × d)
Nut-end engagement b 2 by grip: L≤125 / 125＜L≤200 / L＞200 rows per size (14 → 129 mm)
Thread variants Coarse, fine and very fine pitch rows per size as tabulated by the source
Material / property class Not tabulated by the collected specification — per RFQ
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size (M4 - (M7))All dimensions in millimetres. Attribute labels follow the source: P = pitch (coarse / fine / very fine thread variants); b 1 = screwed-in (metal) end length; b 2 = nut-end thread length by grip L; x 1 / x 2 = thread run-out. Parenthesised sizes are the source's own non-preferred notation; "/" marks the source's empty cells. The source prints no material or property-class columns — per RFQ.
AttributeM4M5M6(M7)
P — Pitch0.70.811
P — Fine thread////
P — Very fine thread////
b 156.57.59
b 2 — L≤12514161820
b 2 — 125＜L≤20020222426
b 2 — L＞200////
x 11.7522.52.5
x 20.911.251.25
  • Row 7 (b 2 — L＞200): The source prints "/" for the L＞200 nut-end engagement on M4-(M7) — carried verbatim, not read across from larger sizes.
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size (M8 - M12)All dimensions in millimetres; labels and reading order as the first table.
AttributeM8M10M12
P — Pitch1.251.51.75
P — Fine thread11.251.25
P — Very fine thread//1.5
b 1101215
b 2 — L≤125222630
b 2 — 125＜L≤200283236
b 2 — L＞200/4549
x 13.23.84.3
x 21.61.92.2
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size ((M14) - (M18))All dimensions in millimetres; labels and reading order as the first table.
Attribute(M14)M16(M18)
P — Pitch222.5
P — Fine thread1.51.51.5
P — Very fine thread///
b 1182022
b 2 — L≤125343842
b 2 — 125＜L≤200404448
b 2 — L＞200535761
x 1556.3
x 22.52.53.2
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size (M20 - M24)All dimensions in millimetres; labels and reading order as the first table.
AttributeM20(M22)M24
P — Pitch2.52.53
P — Fine thread1.51.52
P — Very fine thread///
b 1252830
b 2 — L≤125465054
b 2 — 125＜L≤200525660
b 2 — L＞200656973
x 16.36.37.5
x 23.23.23.8
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size ((M27) - (M33))All dimensions in millimetres; labels and reading order as the first table.
Attribute(M27)M30(M33)
P — Pitch33.53.5
P — Fine thread222
P — Very fine thread///
b 1353842
b 2 — L≤125606672
b 2 — 125＜L≤200667278
b 2 — L＞200798591
x 17.599
x 23.84.54.5
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size (M36 - M42)All dimensions in millimetres; labels and reading order as the first table.
AttributeM36(M39)M42
P — Pitch444.5
P — Fine thread333
P — Very fine thread///
b 1455052
b 2 — L≤125788490
b 2 — 125＜L≤200849096
b 2 — L＞20097103109
x 1101011
x 2555.5
DIN 939 double-end studs, screwed-in end ≈ 1.25 d - attribute rows per size ((M45) - (M52))All dimensions in millimetres; labels and reading order as the first table.
Attribute(M45)M48(M52)
P — Pitch4.555
P — Fine thread333
P — Very fine thread///
b 1586065
b 2 — L≤12596102110
b 2 — 125＜L≤200102108116
b 2 — L＞200115121129
x 11112.512.5
x 25.56.36.3
DIN 939 double-end studs — approximate weight (kg/1000 pcs) by length, M5 – M27Weights in kg per 1000 pieces as printed by the source ("Weight in kgs. per 1,000 pcs. unless otherwise specified. All weights are approximations."). Blank cell = the length/size combination is not tabulated by the source. Decimal points are the source's own. Weights are approximations for shipping/planning, not a guarantee.
Length (mm)Weight kg/1000 pcs — M5Weight kg/1000 pcs — M6Weight kg/1000 pcs — M8Weight kg/1000 pcs — M10Weight kg/1000 pcs — M12Weight kg/1000 pcs — M16Weight kg/1000 pcs — M20Weight kg/1000 pcs — M24Weight kg/1000 pcs — M27
223.65
254.115.85
284.576.52
304.886.9613.1
355.658.0715.124.2
406.429.181727.241
457.1910.21930.345.4
507.9611.42133.349.994.9
5512.522.936.454.3103
6013.624.939.558.8111180
6526.942.663.2119192
7028.945.767.6126205305
7530.848.872.1134217323430
8032.851.876.5142229341452
8554.981150241358475
905885.4158254376497
9561.189.8166266394520
10064.294.3174279412542
110103190303447587
120112205328483632
130221353518677
140237377554722
150253402589767
160269427625812
170451660857
180476696902
190501731947
200525767992
2201082
2401172
  • Row 1 (22): Column alignment note (batch-level, anchored here): the 9 weight columns align one-to-one to the source header sizes (M5, M6, M8, M10, M12, M16, M20, M24, M27); verified against the rendered grid (rowspan/colspan expanded) and the monotone per-size weight progressions, not inferred from the flattened markup alone. The first grid row is a lone "Length" section label, carried as the first-column semantics.

Materials

  • Material and property class specified per RFQ — state the class and coating (carbon steel class, A2/A4 stainless, galvanized) 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 939 Double-End Studs (Screwed-In End ≈ 1.25 d)) 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 1,000–10,000 pieces depending on size. Stock items run 3–7 days. High-strength and custom parts run 15–25 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

Why does the DIN 939 ladder use "/" where DIN 938 uses "-"?

Different presentation of the same absence: both marks are the source's way of printing "no tabulated value for this size/row" — the fine and very fine pitch rows and the long-grip (L＞200) nut-end engagement on the small sizes. The figures are not missing from supply; they are simply not tabulated by the collected specification for those sizes, so quote the exact size-and-pitch callout on the RFQ and the engagement is confirmed per drawing rather than read across from a neighbouring size.

Related knowledge

Request a Quote

Get factory-direct pricing from the manufacturer.

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

We use your details only to answer this inquiry — see our Privacy notice for everything the form collects.