Description
1748971 SCREW CAP HEX SKT HD M2 X 20MM LG SS A4 — BOLTON SKU 56067.
About the 1748971 Fastener
Article 1748971 is identified in the BOLTON item designation as a Bossard hex socket head cap screw, metric size M2 with a 20 mm length, in A4 stainless steel. Socket head cap screws have a cylindrical head with an internal hexagon drive, which allows high tightening torque from a compact head that can be counterbored flush into the mating part. Bossard catalogues its hex socket head cap screws against ISO 4762 (the superseded DIN 912 is listed as the withdrawn equivalent), and offers the family in A2 and A4 stainless, for which Bossard states a commercial quality of property class 70. A4 is the acid-resistant austenitic grade commonly equated with type 316, chosen where corrosion exposure is harsher than A2 can cover. In the M2 size, ISO 4762 fixes a 0.4 mm thread pitch, a head diameter of 3.80 mm maximum, a head height of 2.00 mm maximum and a 1.5 mm hexagon socket.
Key specifications
| Type | Hex socket head cap screw |
|---|---|
| Thread size | M2 |
| Thread pitch | 0.4 mm (ISO 4762 coarse) |
| Length | 20 mm |
| Material | A4 stainless steel |
| Family standard | ISO 4762 (DIN 912 withdrawn equivalent) |
| Head diameter (dk) | 3.80 mm max, per ISO 4762 M2 |
| Head height (k) | 2.00 mm max, per ISO 4762 M2 |
| Hexagon socket (s) | 1.5 mm, per ISO 4762 M2 |
| Manufacturer | Bossard (per designation) |
Typical applications
Miniature socket head cap screws are used in instrument assemblies, electronic enclosures, optics and precision mechanisms where compact heads and internal drives are required. A4 stainless variants are selected when the assembly faces moisture, chemicals or salt-laden environments. Confirm the exact Bossard article configuration and any certification requirement at quotation stage.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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