DIN 7504-M Self-Drilling Screws (Pan Head, Square Recess)
Self-drilling screws per DIN 7504 form M — pan head with square (Robertson-style) recess, zinc plated steel — running Ø 3.5 to 4.8 mm × length 9.5 to 80 mm, with per-size max drilling capacity (2–4 mm) and clamping range; the collected white-painted variant sits on the same form.
Last updated: 2026-11
Specifications
The DIN 7504-M is the square-recess member of the self-drilling family: a pan head driven by an SQ1/SQ2 square bit, whose full-contact drive tolerates one-hand stick-fit installation on production lines. The collected line-page table runs the form across Ø 3.5, 3.9, 4.2 and 4.8 mm with lengths from 9.5 to 80 mm — the collected 4.8 × 80 mm row is the longest printed on this form — with the drilling-capacity ladder at 2 mm for Ø 3.5/3.9, 3 mm for 4.2 and 4 mm for 4.8, and clamping ranges of 4–71 mm across the length ladder. At Ø 4.2 the ladder reaches 50 mm long with a 43 mm clamping range; at Ø 4.8 it runs thirteen to eighty millimetres (4–71 mm). The source also tabulates the same form in a white-painted finish (three Ø 4.2 rows, 13–19 mm) and notes stainless and big-length runs on request — both quoted rather than tabulated here. The square drive is the practical differentiator from the Phillips N form at the same head style; the collected tables are metric, and the inch TEK point-number series is not carried by this source and is not stated here.
| Standard | DIN 7504 form M — self-drilling screw, pan head with square recess |
|---|---|
| Size range | Ø 3.5 – 4.8 mm × length 9.5 – 80 mm (collected table) |
| Max drilling capacity | 2 mm (Ø 3.5/3.9) · 3 mm (Ø 4.2) · 4 mm (Ø 4.8) |
| Clamping range | 4 – 71 mm across the collected length ladder, per size and length |
| Drive | SQ1 (Ø 3.5/3.9), SQ2 (Ø 4.2/4.8), as printed per row |
| Finish | Zinc plated steel as printed; white-painted variant tabulated at Ø 4.2 × 13/16/19 mm; stainless and big lengths on request (quoted, not tabulated) |
| Case hardness | Rockwell C52-58 minimum (C), per the collected self-drilling hardness table |
| Core hardness (after tempering) | Rockwell C32-40, per the collected self-drilling hardness table |
| Material | AISI 1016-1024 or equivalent steel, per the collected self-drilling hardness table |
| Materials | Zinc plated carbon steel (case hardened per the collected hardness row); stainless and other finishes confirmed at quotation |
| Ø — screw diameter (mm) | l — length (mm) | Max drilling capacity (mm) | Clamping range (mm) | Drive bit (as printed) |
|---|---|---|---|---|
| 3.5 | 9.5 | 2 | 5 | SQ1 |
| 3.5 | 13 | 2 | 8 | SQ1 |
| 3.5 | 16 | 2 | 11 | SQ1 |
| 3.9 | 13 | 2 | 7 | SQ1 |
| 3.9 | 16 | 2 | 10 | SQ1 |
| 3.9 | 19 | 2 | 13 | SQ1 |
| 3.9 | 22 | 2 | 17 | SQ1 |
| 3.9 | 25 | 2 | 19 | SQ1 |
| 4.2 | 13 | 3 | 6 | SQ2 |
| 4.2 | 16 | 3 | 9 | SQ2 |
| 4.2 | 19 | 3 | 12 | SQ2 |
| 4.2 | 25 | 3 | 18 | SQ2 |
| 4.2 | 32 | 3 | 25 | SQ2 |
| 4.2 | 38 | 3 | 31 | SQ2 |
| 4.2 | 45 | 3 | 38 | SQ2 |
| 4.2 | 50 | 3 | 43 | SQ2 |
| 4.8 | 13 | 4 | 4 | SQ2 |
| 4.8 | 16 | 4 | 7 | SQ2 |
| 4.8 | 19 | 4 | 10 | SQ2 |
| 4.8 | 25 | 4 | 16 | SQ2 |
| 4.8 | 32 | 4 | 23 | SQ2 |
| 4.8 | 38 | 4 | 29 | SQ2 |
| 4.8 | 45 | 4 | 36 | SQ2 |
| 4.8 | 50 | 4 | 41 | SQ2 |
| 4.8 | 60 | 4 | 51 | SQ2 |
| 4.8 | 70 | 4 | 61 | SQ2 |
| 4.8 | 80 | 4 | 71 | SQ2 |
Materials
- Zinc plated carbon steel (case hardened per the collected hardness row); stainless and other finishes 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 7504-M Self-Drilling Screws (Pan Head, Square Recess)) 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
Square recess versus Phillips on a self-drilling screw — does it matter?
For installation, yes. The square recess grips the bit on all four flanks, so the screw stays stuck to the driver for one-handed placement — the reason production and drywall-style crews specify it — and it resists cam-out at the higher torque a drill point consumes. Phillips cam out by design before overtorque. The drilling behavior is identical for the same diameter: the collected M table carries the same 2/3/4 mm capacity ladder as the N form at Ø 3.5–4.8. Choose by the drive system on site; the recess does not change what the point can drill.
How far does the collected 7504-M ladder run, and what is on request only?
The tabulated ladder ends at Ø 4.8 × 80 mm (4 mm drilling capacity, 71 mm clamping range), and it does not include the Ø 5.5 and 6.3 steps — those belong to the N, K and P pages where the collected tables print them. The source additionally notes stainless-steel TCQ screws, big lengths and colours on request, and tabulates a white-painted variant at three Ø 4.2 lengths (13/16/19 mm); those variants are quoted with a confirmed schedule rather than stated as tabulated stock.
What is the MOQ and lead time for these self-drilling screws?
Minimum order quantity is 10,000 pieces per item. Stocked sizes ship in 3–7 days; non-stock diameters, lengths or finishes are quoted with a confirmed schedule. Self-drilling screws in the common DIN 7504 sizes are widely stocked — confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for self-drilling (TEK) screws state?
State the standard designation and form letter (for example DIN 7504 N or DIN 7504 K), screw diameter and length, the total thickness and type of the metal being drilled through and clamped, head form and drive, finish (for example zinc plated), required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country.
Related knowledge
- Thread-Forming vs Thread-Cutting vs Thread-Rolling Self-Tapping Screws: What the Evidence Settles on Base Material
- Screw Family Selection by Base Material: Wood, Machine and Self-Tapping Threads, Engagement and Coating
- Hex Bolts vs Socket Head Cap Screws: What the Evidence Settles on Strength, Clearance and Cost
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