The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-320-3534, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-320-3534 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Head Height | 0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Fastener Length | 4.500 INCHES NOMINAL IN |
| Thread Length | 1.250 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 6 TYPE |
| Locking Feature | PATCH OR STRIP THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Material | NICKEL ALLOY K-500 FASTENER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.735 INCHES MINIMUM AND 0.750 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 |
| Reference | Meaning |
|---|---|
| 122-5486620 PC3 | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Inc Div Newport News Shipbuilding |
| FF-S-86 TY 6 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-320-3534 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5305-01-331-1262, 5305-01-384-0997, 5305-01-471-6147. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-320-3534: Width Across Flats: 0.375 INCHES NOMINAL IN; Head Height: 0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Fastener Length: 4.500 INCHES NOMINAL IN; Thread Length: 1.250 INCHES NOMINAL IN. 17 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.