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ISO 1479 Hexagon Head Tapping Screws

ISO 1479 hexagon head tapping screws ST2,2 to (ST8) — the wrench-driven sheet-metal screw that forms its own thread in thin material, with the collected head/thread geometry ladder and the per-length mass ladder.

Last updated: 2026-11

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ISO 1479 Hexagon Head Tapping Screws in an industrial setting
Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

ISO 1479 is the hex-driven member of the tapping-screw family: a full hex head takes a wrench or socket instead of the driver bits the other tapping heads want, so it is the sheet-metal screw for structural-ish panel work where torque matters more than flush finishing — ducting straps, equipment skids, heavy bracketry. The screw rolls its own mating thread as it drives (Type C/F tapping forms per the source's y-allowance rows), which is why the collected table carries the pitch row P per size and the y shear allowance that tells you how much torque the forming phase absorbs before the head seats. The collected ladder covers ST2,2 to (ST8) with the across-corners e minimum (3,38 mm at ST2,2 up to 14,26 at (ST8)), head height k nominal/min./max., and the width-across-flats s pair (3,2 mm nominal at ST2,2 up to 13 at (ST8)). The length ladder runs l 4,5 to 50 with Type C and Type F length limits per size and an approximate carbon-steel mass column per thread. Parenthesised sizes — (ST3,9), (ST5,5), (ST8) — are the source's own non-preferred markings. Property class, material and finish are not tabulated by the collected specification — per RFQ (state the host sheet thickness and material; the tapping form C vs F choice follows it).

Standard ISO 1479 — hexagon head tapping screws (self-tapping, wrench-driven)
Size range ST2,2 – (ST8); parenthesised (ST3,9)/(ST5,5)/(ST8) are the source's non-preferred markings
Pitch P: 0,8 (ST2,2) → 2,1 ((ST8)) per the thread row
Head geometry s nominal 3,2 → 13 mm; e min. 3,38 → 14,26; k nominal 1,3 → 5,8
Length ladder l 4,5 – 50 with Type C/F min./max. limits per size
Mass Approximate carbon-steel kg/1000 pcs per thread, from the source's "Approximate mass (7,85 kg/dm3)" ladder
Material / finish Not tabulated by the collected specification — per RFQ
ISO 1479 hexagon head tapping screws - attribute rows per thread size (ST2,2 - (ST8))All dimensions in millimetres. Attribute labels follow the source: P = thread pitch, a = thread end length, e = min. across corners, k = head height (nominal/min./max.), r = washer-face runout limit, s = width across flats (nominal = max.), y = thread-end shear allowance by tapping-screw type (Type C / Type F). The source's blank label cells after an attribute row repeat that attribute.
AttributeLimitST2,2ST2,9ST3,5(ST3,9)ST4,2ST4,8(ST5,5)ST6,3(ST8)
P0,81,11,31,31,41,61,81,82,1
amax.0,81,11,31,31,41,61,81,82,1
emin.3,385,45,957,597,598,718,7110,9514,26
knominal1,31,52,32,32,8344,85,8
kmin.1,181,382,182,182,682,883,854,655,65
kmax.1,421,622,422,422,923,124,154,955,95
rmax.0,30,40,50,50,60,70,80,91,1
snominal=max.3,255,577881013
smin.3,024,825,326,786,787,787,789,7812,73
y max.Type C22,63,23,53,74,3567,5
y max.Type F1,62,12,52,72,83,23,63,64,2
ISO 1479 thread length ladder - nominal/min./max. by type with approximate mass per thread (l 4,5 - 50)All dimensions in millimetres; the merged source header rows are rendered into the column labels. l limits: Type C min./max. and Type F min./max. Mass columns carry the source's own header verbatim: "Approximate mass (7,85 kg/dm3), per 1000 units in kg" — kg per 1000 pcs at 7,85 kg/dm3 carbon steel, blank where the source shows no mass for that length/thread pair.
l nominalType C min.Type C max.Type F min.Type F max.ST2,2ST2,9ST3,5(ST3,9)ST4,2ST4,8(ST5,5)ST6,3(ST8)
4,53,75,33,74,50,13
6,55,77,35,76,50,170,32
9,58,710,38,79,50,230,430,741,081,291,68
1312,213,812,2130,310,550,921,291,542,022,724,25
1615,216,815,2160,661,081,481,762,323,094,778,5
1918,219,818,2190,761,231,671,972,613,485,299,4
2221,222,820,7221,381,872,192,893,865,8210,3
2524,225,823,7251,542,062,43,194,256,3511,2
3230,733,330,7322,913,885,147,5713,3
3836,739,336,7384,465,98,6315,1
4543,746,343,5455,166,819,8917,2
5048,751,348,5505,667,4610,818,7

Materials

  • Material and finish specified per RFQ — state the host sheet (thickness, steel vs aluminium, pre-tapped or not) and the corrosion exposure; tapping screws are commonly case-hardened steel for thread-forming duty

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 1479 Hexagon Head Tapping 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

When does a hexagon head tapping screw beat a pan or countersunk tapping screw?

Torque and serviceability. The hex head lets a wrench deliver the higher seating torque a thick or pre-punched sheet demands, and it survives repeated service removal with less driver-wear than a slotted or cross recess — the trade is a proud head and a hex that needs clearance around it. The pan/countersunk tapping members of this family (ISO 1481/1482/1483 in this catalog) drive faster with a power tool and finish flush or low, which is why they dominate high-volume panel work while the hex line holds the bracketry and ducting jobs. Within the collected ladders the geometry split is visible: this page's head heights (k nominal 1,3 → 5,8) are sized for wrench engagement, and the y Type C/F rows still give you the thread-forming allowance per host sheet. Property class, material and finish stay per RFQ on all members of the family.

Related knowledge

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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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