Stainless Socket Head Cap Screws
| Standard | DIN 912 · ISO 4762 · ASTM A574 |
|---|---|
| Material | SS304 / SS316 |
| Strength Grade | A2-70 / A4-80 |
| Size Range | M3-M24 |
| Surface Treatment | Passivated |
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Product Description
Product Description & Key Specifications
DIN 912 / ISO 4762 stainless socket head cap screws are supplied in SS304 / SS316 with A2-70 / A4-80 grade options for compact, high-access internal-hex fastening. Common supply range is M3-M24 with passivated finish for equipment frames, panels, machinery covers and precision stainless assemblies.
Socket head cap screws are selected when the assembly needs higher drive engagement than small external heads can provide, or where the screw must fit inside counterbored holes or compact equipment layouts. Confirm head diameter, head height, socket size, thread length and clearance before ordering.
SS304 / A2 is suitable for general equipment and outdoor stainless assemblies, while SS316 / A4 is preferred for marine, washdown, chloride and hygienic service. A4-80 can be specified when a higher-strength stainless socket screw is required and size availability is confirmed.
| Product type | Stainless socket head cap screws |
|---|---|
| Standards | DIN 912 / ISO 4762 / ASTM A574 reference |
| Material | SS304 / SS316 |
| Strength grade | A2-70 / A4-70 / A4-80 |
| Size range | M3-M24, with length confirmed by order |
| Common models | M4 x 12, M5 x 16, M6 x 20, M8 x 25, M10 x 30, M12 x 40 |
| Drive / head | Hex socket drive, cylindrical socket head |
| Surface finish | Passivated stainless surface |
| Documentation | CoC, material certificate and dimensional report on request |
Dimensions & SpecificationsDIN 912 / ISO 4762
Technical Drawing
Dimensional Table
| Parameter | M1.4 | M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M42 | M48 | M56 | M64 | M72 | M80 | M90 | M100 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.3 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1|1.25 | 1|1.25|1.5 | 1.25|1.5|1.75 | 1.5|2 | 1.5|2 | 1.5|2|2.5 | 1.5|2|2.5 | 1.5|2|2.5 | 2|3 | 2|3 | 2|3.5 | 2|3.5 | 3|4 | 3|4.5 | 3|5 | 4|5.5 | 4|6 | 4|6 | 4|6 | 4|6 | 4|6 |
| dk/max | 2.6 | 3 | 3.8 | 4.5 | 5.5 | 7 | 8.5 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 40 | 45 | 50 | 54 | 63 | 72 | 84 | 96 | 108 | 120 | 135 | 150 |
| dk/min | 2.46 | 2.86 | 3.62 | 4.32 | 5.32 | 6.78 | 8.28 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 32.61 | 35.61 | 39.61 | 44.61 | 49.61 | 53.54 | 62.54 | 71.54 | 83.46 | 95.46 | 107.46 | 119.46 | 134.37 | 149.37 |
| da/max | 1.8 | 2 | 2.6 | 3.1 | 3.6 | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 24.4 | 26.4 | 30.4 | 33.4 | 36.4 | 39.4 | 45.5 | 52.6 | 63 | 71 | 79 | 87 | 97 | 107 |
| e/min | 1.5 | 1.73 | 1.73 | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 13.72 | 16 | 16 | 19.44 | 19.44 | 21.73 | 21.73 | 25.15 | 27.43 | 30.85 | 36.57 | 41.13 | 46.83 | 52.53 | 62.81 | 74.21 | 85.61 | 97.04 |
| k/max | 1.4 | 1.6 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 | 6.0 | 8.0 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 42 | 48 | 56 | 64 | 72 | 80 | 90 | 100 |
| k/min | 1.26 | 1.46 | 1.86 | 2.36 | 2.86 | 3.82 | 4.82 | 5.70 | 7.64 | 9.64 | 11.57 | 13.57 | 15.57 | 17.57 | 19.48 | 21.48 | 23.48 | 26.48 | 29.48 | 32.38 | 35.38 | 41.38 | 47.38 | 55.38 | 63.26 | 71.26 | 79.26 | 89.13 | 99.13 |
| r/min | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 | 1.0 | 1.0 | 1.0 | 1.0 | 1.2 | 1.6 | 2.0 | 2 | 2 | 2 | 2.5 | 2.5 |
| s/min | 1.32 | 1.52 | 1.52 | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 12.032 | 14.032 | 14.032 | 17.05 | 17.05 | 19.065 | 19.065 | 22.065 | 24.065 | 27.065 | 32.08 | 36.08 | 41.08 | 46.08 | 55.1 | 65.1 | 75.1 | 85.12 |
| s/max | 1.36 | 1.56 | 1.56 | 2.06 | 2.58 | 3.08 | 4.095 | 5.14 | 6.14 | 8.175 | 10.175 | 12.212 | 14.212 | 14.212 | 17.23 | 17.23 | 19.275 | 19.275 | 22.275 | 24.275 | 27.275 | 32.33 | 36.33 | 41.33 | 46.33 | 55.4 | 65.4 | 75.4 | 85.47 |
| t/min | 0.6 | 0.7 | 1 | 1.1 | 1.3 | 2 | 2.5 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13.5 | 15.5 | 18 | 19 | 24 | 28 | 34 | 38 | 43 | 48 | 54 | 60 |
Engineering references
Technical resources
Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.02
Selection
Selection Advantages by Application
Renewable Equipment Assemblies
M6, M8 and M10 stainless socket head cap screws are common for inverter enclosures, tracker drive components, nacelle panels and precision brackets. SS316 / A4 is preferred for coastal renewable projects.
Renewable energy fastenersMarine & Coastal Equipment
SS316 / A4 passivated socket screws support covers, brackets and stainless machinery components exposed to salt spray. Typical RFQs include M6 x 20, M8 x 25 and M10 x 30.
Marine fastenersMedical / Hygienic Equipment
A4 stainless socket screws are used on guards, frames and equipment modules where corrosion resistance and compact internal drive access are required. Confirm cleanability and exposed socket requirements.
Medical fastenersRailway Equipment Panels
M5, M6, M8 and M10 socket screws can be specified for cabinets, covers and maintenance panels where compact head geometry and repeatable drive engagement matter.
Railway fasteners03
Assembly
Recommended Matching Products
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Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Cold forming or machining selected by size, length and order volumeIncoming SS304 / SS316 material verification
Socket forming and thread rolling for metric screw threadsSocket gauge, GO / NO-GO thread gauge and head dimension inspection
Passivation and stainless surface finishingVisual inspection for socket damage, burrs and thread defects
Standard, semi-standard and drawing-based screw productionTensile, hardness or salt-spray tests arranged when specified
Bulk, small-box or project kit packagingCoC, MTC and inspection report prepared on request
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FAQ
Common Questions Before RFQ
Is DIN 912 the same as ISO 4762?
DIN 912 and ISO 4762 are common references for socket head cap screws. Many drawings use DIN 912, while ISO 4762 is the international reference. Confirm dimensions, tolerance and marking before ordering.
Should I choose SS304 or SS316 socket head cap screws?
SS304 / A2 is suitable for general corrosion-resistant assemblies. SS316 / A4 is preferred for marine, coastal, washdown, chemical or chloride-exposed environments.
What socket screw sizes are commonly requested?
Common RFQ models include M4 x 12, M5 x 16, M6 x 20, M8 x 25, M10 x 30 and M12 x 40. Final length, thread length and certificate requirements should be confirmed by drawing.
Can A4-80 socket head cap screws be supplied?
Yes. A4-80 stainless socket head cap screws can be supplied when higher stainless strength and chloride resistance are required. Size availability should be confirmed during RFQ.
Are passivated socket screws available?
Yes. Passivated SS304 and SS316 socket head cap screws are available for corrosion-resistant project supply.
Need DIN 912 / ISO 4762 stainless socket screws?
Send your screw standard, size, length, material, grade, finish, quantity and certificate requirements. Our team can confirm suitable stainless socket head cap screw specifications for your assembly.
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