DIN 913 Flat Point Set Screws
| Standard | DIN 913 · ISO 4026 |
|---|---|
| Material | Carbon Steel / Alloy Steel |
| Strength Grade | 14H / 22H / 33H / 45H |
| Size Range | M1.6-M24 |
| Surface Treatment | Black Oxide / Zinc Plated / Zinc Flake |
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Product Description
Product Description & Key Specifications
DIN 913 specifies a headless, fully threaded set screw with an internal hexagon drive and flat point. It installs flush with or below the surrounding surface and applies radial clamping or positioning contact to a shaft, collar, hub, gear, pulley or mating component.
The flat point spreads contact across a broader area than a cone point and normally penetrates less aggressively than cone- or cup-point alternatives. It may still mark a soft shaft under high contact pressure, so the mating material, tightening method and required holding function must be considered.
DIN 913 is the legacy designation and ISO 4026 is its current successor family. Confirm thread, length, socket, point geometry, hardness class and coating against the controlled edition. Do not specify ordinary bolt classes such as 8.8, 10.9 or 12.9 for this product; set screws use the applicable hardness-class system.
| Product type | Headless hexagon socket set screw with flat point |
|---|---|
| Standard | DIN 913 / ISO 4026 |
| Material | Carbon steel / alloy steel |
| Hardness class | 14H / 22H / 33H / 45H |
| Size range | M1.6-M24 |
| Thread | Metric coarse thread; special pitch only by approved drawing |
| Drive | Internal hexagon socket |
| Point | Flat point |
| Surface finish | Black oxide / zinc plated / zinc flake |
| Inspection | Thread, length, socket, point geometry, hardness and coating as specified |
Dimensions & SpecificationsDIN 913 / ISO 4026
Technical Drawing
Dimensional Table
| Parameter | M1.4 | M1.6 | M1.8 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.3 | 0.35 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 |
| dp/max | 0.7 | 0.8 | 0.9 | 1 | 1.5 | 2 | 2.5 | 3.5 | 4 | 5.5 | 7 | 8.5 | 10 | 12 | 13 | 15 | 17 | 18 |
| dp/min | 0.45 | 0.55 | 0.65 | 0.75 | 1.25 | 1.75 | 2.25 | 3.2 | 3.7 | 5.2 | 6.64 | 8.14 | 9.64 | 11.57 | 12.57 | 14.57 | 16.57 | 17.57 |
| e/min | 0.803 | 0.803 | 0.803 | 1.003 | 1.427 | 1.73 | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 |
| s/min | 0.711 | 0.711 | 0.711 | 0.889 | 1.27 | 1.52 | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 |
| s/max | 0.724 | 0.724 | 0.724 | 0.902 | 1.295 | 1.545 | 2.045 | 2.56 | 3.08 | 4.095 | 5.095 | 6.095 | 6.095 | 8.115 | 10.115 | 10.115 | 12.142 | 12.142 |
| t/min | 0.6 | 0.7 | 0.8 | 0.8 | 1.2 | 1.2 | 1.5 | 2 | 2 | 3 | 4 | 4.8 | 5.6 | 6.4 | 7.2 | 8 | 9 | 10 |
Engineering references
Technical resources
Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.02
Selection
Selection Advantages by Application
Shaft, collar and hub positioning
The flat point applies broad contact to collars, hubs, gears and pulleys with less intentional penetration than cone- or cup-point set screws. Joint holding capacity still depends on contact force, shaft material and the complete design.
Automotive and EV fastenersMachinery adjustment and component location
Headless installation suits compact mechanisms where the screw must sit flush or recessed. Verify tapped-hole depth, key engagement and point contact before assembly.
Industrial equipment fasteners03
Assembly
Recommended Matching Products
04
Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Headless blank forming and metric thread rollingDiameter, length, pitch and GO/NO-GO thread inspection
Internal hexagon socket and flat-point formingSocket size/depth and point-geometry inspection
Heat treatment for specified hardness classHardness profile, decarburization and material traceability checks
Black oxide, zinc or zinc-flake finishCoating, thread fit and hydrogen-embrittlement process controls where applicable
Bulk, small-box or project-kit packagingLot identification, quantity and certificate checks
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FAQ
Common Questions Before RFQ
What is the difference between DIN 913 and DIN 916?
DIN 913 has a flat point that spreads contact; DIN 916 has a cup point that bites into the mating surface. They serve different contact functions and are not automatic substitutes.
Is ISO 4026 the replacement for DIN 913?
Yes, ISO 4026 is the correct successor family for a flat-point hexagon socket set screw. Confirm the cited edition, dimensions, hardness class and coating before conversion.
Does DIN 913 always mean hardness class 45H?
No. 45H is common commercially, but the dimensional designation alone does not define every product as 45H. State the required hardness class explicitly.
Can a DIN 913 set screw carry bolt-like tensile load?
No. A headless set screw is not intended to act as a conventional tensile-loaded bolt. It applies point contact or radial clamping within a designed assembly.
Can hardened set screws be zinc plated?
They can be supplied with an approved zinc process, but high-hardness parts require controls for hydrogen embrittlement, coating build-up and thread or socket fit.
Need DIN 913 flat-point set screws?
Send the thread size, length, hardness class, coating, quantity and mating-surface requirements. Include the controlled drawing or legacy pitch callout for non-standard applications.
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