The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-560-2571, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Amz Alabama Inc.. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-560-2571 |
| Primary Part Number | 4397031-090 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Amz Alabama Inc. |
| Status | ACTIVE |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3 |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 4397031-090 PRIMARY | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4397031-090 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
| 4397031 | D/9 Drawing number reference only Bae Systems Survivability Systems Llc |
| 4397031-090 | 5/9 Secondary reference Bae Systems Land & Armaments L.p. |
NSN 5305-01-560-2571 is a Screw,cap,socket Head, manufactured by Amz Alabama Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-560-2571 has 1 manufacturer part number on file: 4397031-090 (Amz Alabama Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 5305-01-564-3112, 5305-01-579-3694, 5305-01-584-7589. Verify interchangeability with system specifications before substitution.
Key specifications for 4397031-090: Fastener Length: 0.625 INCHES NOMINAL IN; Head Style: FLAT COUNTERSUNK; Thread Direction: RIGHT-HAND; Special Features: THREAD SIZE .250". 9 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.