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

ISO 14579 Hexalobular Pan Head Screws

ISO 14579 hexalobular socket pan head screws — M2 to M20, the torque-transmitting six-lobe drive in a full pan head, with the collected geometry rows, ls/lg thread-length ladder and carbon-steel weight table.

Last updated: 2026-11

Request a Quote

ISO 14579 Hexalobular Pan Head Screws in an industrial setting
Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

ISO 14579 pairs the hexalobular (six-lobe, "Torx-class") drive with a conventional full pan head: the head geometry of a cheese-head screw with a drive that resists cam-out and carries far more installation torque than a slot or a Phillips of the same size. The collected data covers M2 through M20 across three source tables — head and drive geometry per thread (including the drive size row the source labels "inner hexabulator", sizes 6 at M2 up to 90 at M20), a per-length ls/lg ladder splitting each screw into unthreaded shank and grip portions (fully threaded lengths print "+" in the source), and an approximate carbon-steel weight ladder. Order the drive by the size column: an A-female bit of the tabulated size is what seats without reaming the socket. The torque advantage over the ISO 1580 slotted pan head on the very same head outline is the reason assembly lines spec this series; the collected tables carry geometry only, so property class (the standard is typically 8.8-class capable) and finish go per RFQ. Flagged verbatim quirks in the table include the source's drive-row wording, a stray M2 ls/lg print at l = 20, and two weight-ladder cells that break their column's progression.

Standard ISO 14579 — hexalobular socket pan head screws
Size range Threads M2 – M20 (geometry split M2–M8 / M10–M20 in the source)
Head diameter dk: max.c / max.d / min. per thread (e.g. M5: 8,5 / 8,72 / 8,28 mm)
Head height k: max / min. per thread (M5: 5 / 4,82 mm)
Drive Hexalobular socket, source row "inner hexabulator": size 6 (M2) → 90 (M20), A ref. 1,75 → 20,2 mm
Length ladder l 3 – 200 with ls (shank) / lg (grip) min-max pairs; fully threaded lengths print "+" in the source
Weight Approximate carbon-steel kg/1000 pcs ladder carried verbatim
Property class / finish Not tabulated by the collected specification — per RFQ
ISO 14579 hexalobular pan head screws - geometry, threads M2 - M8All dimensions in millimetres. Source label wording carried verbatim: the drive row is headed "inner hexabulator" (the source's rendering of the hexalobular socket) and the dk rows print "max.c" / "max.d" (drive-interference / head-interference checks). The "+" cells in the length tables are the source's availability marks (full lg = ls for short lengths); numeric cells are ls (unthreaded shank) and lg (grip) min./max. pairs.
Thread dPb ref.dk max.cdk max.ddk min.da max.ds max.ds min.lf max.k maxk min.r min.v max.da min.w min.inner hexabulator sizeA ref.t max.t min.
M20,4163,83,983,622,621,860,5121,860,10,23,480,5561,750,840,71
M2,50,45174,54,684,323,12,52,360,512,52,360,10,254,180,8582,41,040,91
M30,5185,55,685,323,632,860,5132,860,10,35,071,15102,81,271,01
M40,72077,226,784,743,820,643,820,20,46,531,4203,951,81,42
M50,8228,58,728,285,754,820,654,820,20,58,031,9254,52,031,65
M61241010,229,786,865,820,6865,70,250,69,382,3305,62,422,02
M81,25281313,2712,739,287,781,0287,640,40,812,333,3457,953,312,92
  • Row 1 (M2): Header terms carried verbatim from the source: "inner hexabulator" (hexalobular socket), "max.c"/"max.d" subscript rows and "k max" without the period. Not normalized.
ISO 14579 hexalobular pan head screws - geometry, threads M10 - M20All dimensions in millimetres. Labels as in the M2 - M8 table; column order follows the source.
Thread dPb ref.dk max.cdk max.ddk min.da max.ds max.ds min.lf max.k maxk min.r min.v max.da min.w min.inner hexabulator sizeA ref.t max.t min.
M101,5321616,2715,7311,2109,781,02109,640,4115,334508,954,023,62
M121,75361818,2717,7313,71211,731,451211,570,61,217,234,85511,355,214,82
M142402121,3320,6715,71413,731,451413,570,61,420,175,86013,455,995,62
M162442424,3323,6717,71615,731,451615,570,61,623,176,87015,77,016,62
M182,5482727,3326,6720,21817,731,871817,570,61,825,877,88017,7587,5
M202,5523030,3329,6722,42019,672,042019,480,8228,878,69020,29,28,69
ISO 14579 hexalobular pan head screws - ls / lg ladder, lengths 3 - 80, threads M2 - M8Cells are the source's ls min./max. and lg min./max. pairs in millimetres ("+" = the length is fully threaded, ls = lg). Blank = size/length combination not tabulated by the source.
l nom.l min.l max.M2 ls min.M2 lg max.M2,5 ls min.M2,5 lg max.M3 ls min.M3 lg max.M4 ls min.M4 lg max.M5 ls min.M5 lg max.M6 ls min.M6 lg max.M8 ls min.M8 lg max.
32,83,2++
43,764,24++++
54,765,24++++++
65,766,24++++++
87,718,29++++++++
109,7110,29++++++++++
1211,6512,35++++++++++++++
1615,6516,35++++++++++++++
2019,5820,4224++++++++++++
2524,5825,425,7584,57++++++++
3029,5830,429,5126,51048++++
3534,535,511,515913611++
4039,540,516,520141811165,7512
4544,545,51923162110,7517
5049,550,52428212615,7522
5554,455,6263120,7527
6059,460,6313625,7532
6564,465,630,7537
7069,470,635,7542
8079,480,645,7552
  • Row 9 (20): l = 20, M2: the source prints ls 2 / lg 4 with lg > l. Carried verbatim, not normalized.
ISO 14579 hexalobular pan head screws - ls / lg ladder, lengths 16 - 200, threads M10 - M20Cells are ls / lg min.-max. pairs in millimetres; blank = not tabulated by the source.
l nom.l min.l max.M10 ls min.M10 lg max.M12 ls min.M12 lg max.M14 ls min.M14 lg max.M16 ls min.M16 lg max.M18 ls min.M18 lg max.M20 ls min.M20 lg max.
1615,6516,35
2019,5820,42
2524,5825,42
3029,5830,42
3534,535,5
4039,540,5
4544,545,55,513
5049,550,510,518
5554,455,615,52310,2529
6059,460,620,52815,25241020
6564,465,625,53320,252915251121
7069,470,630,53825,2534203016269,522
8079,480,640,54835,25443040263619,53215,528
9089,390,750,55845,25544050364629,54225,538
10099,3100,760,56855,25645060465639,55235,548
110109,3110,765,25746070566649,56245,558
120119,3120,775,25847080667659,57255,568
130129,2130,88090768669,58265,578
140139,2140,890100869679,59275,588
150149,2150,89610689,510285,598
160159,2160,810611699,511295,5108
180179,2180,8119,5132115,5128
200199,075200,925135,5148
ISO 14579 hexalobular pan head screws - approximate weight, carbon steel, kg/1000 pcsWeight ladder carried verbatim (source heading "Approximate weight of the screws of carbon in kg 1000"); blank = not tabulated.
Nominal length lM2M2,5M3M4M5M6M8M10M12M14M16M18M20
30,155
40,1750,345
50,1950,3750,67
60,2150,4050,711,5
80,2550,4650,81,652,45
100,2950,5250,881,82,74,7
120,3550,5850,961,952,955,0710,9
160,4150,7051,162,253,455,7512,120,9
200,4950,8251,362,654,016,5313,422,932,1
250,9751,613,154,787,591525,435,74871,3
301,863,655,558,316,927,939,35377,8111128
354,156,329,9118,930,442,95884,4120139
404,657,091120,932,946,56391129150
457,8612,122,936,150,16897,6128161
508,6313,224,930,354,573106147172
5514,326,942,558,978114156183
6015,428,945,763,484122165194
653148,967,890130174205
703352,171,396138183216
803758,580,2108154203241
9064,989,1120170223266
10071,298132186243291
110116144202263316
120156218283341
130168234303366
140180250323391
150266343416
160282363441
180403491
200541
  • Row 15 (50): l = 50, M10: the source prints 30,3 against the M10 ladder's surrounding progression (36,1 at 45 / 42,5 at 55). Carried verbatim, not normalized.
  • Row 14 (45): l = 45, M18: the source prints 128 against the ladder's progression (120 at 40 / 129 at 40? see l = 40 M18 129 and l = 50 M18 147). Carried verbatim, not normalized.

Materials

  • Property class and finish specified per RFQ — hexalobular pan heads are commonly 4.8–8.8 steel with zinc or black finish; state the tightening method and exposure 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 (ISO 14579 Hexalobular Pan Head Screws) 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

Hexalobular pan head (ISO 14579) or the six-lobe button head — which head do I pick?

Head height and drive depth. The pan head here is a taller, straight-sided head — k runs 5 mm at M5 up to 20 mm at M20 in the collected ladder — so it carries a deeper hexalobular socket (t max 2,03 mm at M5) and tolerates more installation torque than the shallow button head of ISO 7380-1, whose k is roughly half that and whose drive depth follows. Use the button head where the head must sit low and proud edges are unacceptable; use ISO 14579 where the joint needs the torque and the head height does not interfere. The comparison page for six-lobe versus other drives lives on the screws family; and since neither collected table names property class, quote the class (and the torque spec that goes with it) per RFQ — the class is what makes the torque advantage real.

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.