DIN 913 Socket Set Screws (Flat Point)
Hexagon socket set screws with flat point per DIN 913 — current norm DIN EN ISO 4026 — M1.4 to M24 in 45H steel or A2/A4 stainless, thread 6g. The grub screw for locking hubs, collars and pulleys without a head.
Last updated: 2026-11
Specifications
The flat-point set screw is the headless clamp: a fully threaded grub screw driven by an internal hexagon, its flat point pressing a shallow ring seat into the shaft or mating part it locks. The collected standard table runs M1.4 through M24 in 45H steel (the set-screw hardness class) or A2/A4 stainless, thread tolerance 6g. At M6 the point measures 4 mm across, with a 3 mm hex socket and a 2 mm minimum key engagement — proportions that let the screw dig in and hold without a trial fit. DIN 913's current norm is DIN EN ISO 4026; the flat point is the general-purpose tip of the set-screw family, chosen over cup, cone or dog points when the mating surface must not be deeply marked.
| Standard | DIN 913 — hexagon socket set screw with flat point; current norm DIN EN ISO 4026 |
|---|---|
| Size range | M1.4 – M24 |
| Dimensions at M6 | dp (point diameter) max 4 mm; s (hex socket) nominal 3 mm; t (key engagement) min 2 mm |
| Strength classes | Steel 45H; stainless A2, A4 |
| Thread | 6g |
| Nominal size | Thread pitch (mm) | D max — body dia (mm) | J max — flat point dia (mm) | L preferred min — flat point (mm) |
|---|---|---|---|---|
| M3 | 0.5 | 2.10 | 2.0 | 3.0 |
| M4 | 0.7 | 2.75 | 2.5 | 3.0 |
| M5 | 0.8 | 3.70 | 3.5 | 4.0 |
| M6 | 1.00 | 4.25 | 4.0 | 4.0 |
| M8 | 1.25 | 6.00 | 5.5 | 5.0 |
| M10 | 1.50 | 7.40 | 7.0 | 6.0 |
| M12 | 1.75 | 8.60 | 8.5 | 8.0 |
| M16 | 2.00 | 12.35 | 12.0 | 12.0 |
| M20 | 2.50 | 16.00 | 15.0 | 14.0 |
| M24 | 3.00 | 18.95 | 18.0 | 20.0 |
Materials
- Steel
- Stainless steel
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 913 Socket Set Screws (Flat Point)) 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
Where does a flat-point set screw grip best?
On parts where a shallow seat is enough: the flat point spreads its clamp over a small ring face, which holds hubs, collars, pulleys and indexing handles against light torque without cutting deeply into the shaft. The trade-off is holding power at the tip — against higher torque or rotation reversal, cup or cone points bite harder, and against a hardened shaft a flat point may need a shallow flat spot machined on the surface to seat on. For most office-machine, fixture and hand-tool assemblies, the flat point is the tip that does the job without ruining the shaft.
What is the MOQ and lead time for these socket 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. Common sizes in this designation are widely stocked — confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for these socket screws state?
State the standard designation (for example DIN 912, ISO 4762 or DIN 913), thread size and pitch, head or length dimension, strength class or stainless grade (such as 12.9, A2-70 or A4-80), finish (black oxide, zinc plated, or plain), 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
- Screw Family Selection by Base Material: Wood, Machine and Self-Tapping Threads, Engagement and Coating
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