The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-197-6436, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Reidville Hydraulics & Mfg 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-197-6436 |
| Primary Part Number | 478 1091-001 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Reidville Hydraulics & Mfg Inc |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Head Height | 0.626 INCHES NOMINAL IN |
| Fastener Length | 3.937 INCHES NOMINAL IN |
| Thread Length | 1.398 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.937 INCHES NOMINAL 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 |
|---|---|
| 478 1091-001 | Reidville Hydraulics & Mfg Inc (USA) |
| Reference | Meaning |
|---|---|
| 478 1091-001 | 3/9 Design control — primary reference Bae Systems Hagglunds Ab |
NSN 5305-01-197-6436 is a Screw,cap,socket Head, manufactured by Reidville Hydraulics & Mfg Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-197-6436 has 1 manufacturer part number on file: 478 1091-001 (Reidville Hydraulics & Mfg Inc).
Key specifications for 478 1091-001: Width Across Flats: 0.500 INCHES NOMINAL IN; Head Height: 0.626 INCHES NOMINAL IN; Fastener Length: 3.937 INCHES NOMINAL IN; Thread Length: 1.398 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.