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ISO 7049 Cross Recessed Pan Head Tapping Screws (Types H and Z, Form C)

ISO 7049 pan head tapping screws with cross recess H and Z, Form C — ST2,2 to ST6,3 — the power-tool sheet-metal screw, with the collected recess sizing (No. 1/2/3), Type H/Z depth-gauge and penetration ladders.

Last updated: 2026-11

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ISO 7049 Cross Recessed Pan Head Tapping Screws (Types H and Z, Form C) in an industrial setting
Illustrative image redrawn from real product references — not a photograph of stocked items.

Specifications

ISO 7049 is the pan head built for the driver gun: a cross recess (types H and Z, with the recess number — 1, 2 or 3 — printed per size in the collected table) instead of a slot, so the screw takes power-tool torque without camming out. Form C in the designation marks the tapping point form the y rows belong to. The collected ladder runs ST2,2 to ST6,3 with the pan geometry (dk nominal=max./min. 4,2/3,9 up to 12,5/12,07; k nominal=max./min.; radius r and pan radius rf), the cross-recess No. ladder (1 at the small sizes through 3 at ST5,5/ST6,3), and — the rows that make this standard distinct — the Type H and Type Z driving data per size: the m depth-gauge (approx.) and the source's "Penetration deptd" min./max. limits, which tell the assembly line how deep the driver should push before the recess is fully engaged. One verbatim ladder break is flagged: Type Z penetration min. prints 1,47 at ST3,5 against 1,58 at ST2,9 and 1,7 at (ST3,9) — carried verbatim, not normalized. Length ladder l 4,5 to 38 with the source's approximate mass columns (the source's Table 2 omits the thread-size header; the column order follows Table 1 — documented in the table note). Property class, material and finish are not tabulated — per RFQ.

Standard ISO 7049 — pan head tapping screws with cross recess H and Z, Form C
Size range ST2,2 – ST6,3; parenthesised (ST3,9) is the source's non-preferred marking
Head geometry dk nominal=max. 4,2 → 12,5 mm (min. 3,9 → 12,07); k nominal=max. 1,8 → 4,55; rf approx. 3,4 → 9,5
Cross recess No. 1 (ST2,2/ST2,9), No. 2 (ST3,5–ST4,8), No. 3 (ST5,5/ST6,3)
Recess driving data Type H m approx. 2,6 → 7,1 / Type Z m approx. 2,4 → 6,7; penetration min./max. per size (ST3,5 Type Z cell flagged verbatim)
Length ladder l 4,5 – 38 with Type C/F limits and approximate mass per thread
Material / finish Not tabulated by the collected specification — per RFQ
ISO 7049 pan head tapping screws with cross recess H and Z - attribute rows per thread size (ST2,2 - ST6,3)All dimensions in millimetres. Attribute labels follow the source: P = thread pitch, a = thread end length, dk = head diameter (nominal = max.), k = head height (nominal = max.), r = transition radius, rf = pan-head radius, Cross recess No. = recess size; Type H / Type Z carry the source's own labels m (recess depth gauge, approx.) and "Penetration deptd" (min./max.) verbatim; y = thread-end shear allowance by tapping-screw type.
AttributeLimitST2,2ST2,9ST3,5(ST3,9)ST4,2ST4,8ST5,5ST6,3
P0,81,11,31,31,41,61,81,8
amax.0,81,11,31,31,41,61,81,8
dknominal=max.4,25,66,97,58,29,510,812,5
dkmin.3,95,36,547,147,849,1410,3712,07
knominal=max.1,82,22,62,83,053,553,954,55
kmin.1,551,952,352,552,753,253,654,25
rmax.0,30,40,50,50,60,70,80,9
rfapprox.3,44,45,45,86,27,28,29,5
Cross recessNo.11222233
Type H mapprox.2,634,24,44,656,57,1
Type H Penetration deptdmin.0,861,351,41,631,82,262,493
Type H Penetration deptdmax.1,321,82,032,262,462,873,153,66
Type Z mapprox.2,42,93,94,14,34,76,26,7
Type Z Penetration deptdmin.1,11,581,471,71,882,282,513,02
Type Z Penetration deptdmax.1,351,831,932,162,342,742,973,48
y max.Type C22,63,23,53,74,356
y max.Type F1,62,12,52,72,83,23,63,6
  • Row 14 (Type Z Penetration deptd): Type Z "Penetration deptd" min. breaks its own ladder at ST3,5 (1,47 printed against 1,58 at ST2,9 and 1,7 at (ST3,9)) — carried verbatim, not normalized. The source's "Penetration deptd" label is also carried verbatim.
ISO 7049 thread length ladder - nominal/min./max. by type with approximate mass per thread (l 4,5 - 38)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", blank where the source shows no mass. The source's Table 2 header omits the thread-size row; the mass columns run ST2,2 → ST6,3 left-to-right per Table 1's thread order.
l nominalType C min.Type C max.Type F min.Type F max.ST2,2ST2,9ST3,5(ST3,9)ST4,2ST4,8ST5,5ST6,3
4,53,75,33,74,50,174
6,55,77,35,76,50,2140,424
9,58,710,38,79,50,2740,5320,841,071,261,85
1312,213,812,2130,3440,6581,021,291,52,183,244,32
1615,216,815,2160,4040,7661,171,481,712,463,624,86
1918,219,818,2190,8741,321,671,922,7445,4
2221,222,820,7221,471,862,133,024,385,94
2524,225,823,7251,622,052,343,34,766,48
3230,733,330,7322,833,965,677,74
3836,739,336,7384,526,458,82

Materials

  • Material and finish specified per RFQ — case-hardened steel is the standard tapping body for power driving; state host sheet and any plated finish 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 7049 Cross Recessed Pan Head Tapping Screws (Types H and Z, Form C)) 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

Cross recess Type H or Type Z — does the recess letter change the screw I buy?

The screw carries both rows; the driver decides. The collected table gives every size both the Type H and Type Z recess data — m gauge and penetration limits — because the standard permits both recess forms on the same head, and the geometry that differs is how the driver tip engages: Type H bites harder (higher penetration limits across the board — e.g. max. 3,66 vs 3,48 at ST6,3) for torque transfer in hard sheet, while Type Z’s shallower engagement reduces cam-out wear in soft material and high-speed driving. What you actually order is the recess number (No. 1/2/3 per size) matched to the right driver — a No. 2 tip on a No. 3 recess spins in the larger cross. The penetration rows are assembly-line setup data, not purchase data, and one of them (Type Z min. at ST3,5: 1,47) breaks the ladder — flagged verbatim, confirm per RFQ if your drive-depth programming keys off it. Material, class and finish stay per RFQ.

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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