The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-642-9583, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Evansville Bolt & Nut Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-642-9583 |
| Primary Part Number | 8C50KBCS |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Evansville Bolt & Nut Inc |
| Status | ACTIVE |
| Width Across Flats | 0.094 INCHES NOMINAL IN |
| Head Height | 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN |
| Fastener Length | 0.750 INCHES MAXIMUM IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.298 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8C50KBCS PRIMARY | Evansville Bolt & Nut Inc (USA) |
NSN 5305-01-642-9583 is a Screw,cap,socket Head, manufactured by Evansville Bolt & Nut Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-642-9583 has 1 manufacturer part number on file: 8C50KBCS (Evansville Bolt & Nut Inc).
Key specifications for 8C50KBCS: Width Across Flats: 0.094 INCHES NOMINAL IN; Head Height: 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN; Fastener Length: 0.750 INCHES MAXIMUM IN; Thread Length: 0.750 INCHES NOMINAL IN. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.