The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-325-1329, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-325-1329 |
| Primary Part Number | 709-5486669 ITEM028 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT CHAMFER |
| Nondefinitive Spec/std Data | 6 TYPE |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING 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 | S |
| Part Number | Manufacturer |
|---|---|
| 5486669 PC28 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 709-5486669 PC28 | Naval Sea Systems Command (USA) |
| 709-5486669 ITEM028 PRIMARY | Naval Sea Systems Command (USA) |
| 0.312-18UNC-3AX0.625 CRES | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| FF-S-86 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-325-1329 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-325-1329 has 4 manufacturer part numbers on file: 5486669 PC28 (Huntington Ingalls Inc Div Newport News Shipbuilding), 709-5486669 PC28 (Naval Sea Systems Command), 709-5486669 ITEM028 (Naval Sea Systems Command), 0.312-18UNC-3AX0.625 CRES (Naval Sea Systems Command).
Key specifications for 709-5486669 ITEM028: Thread Length: 0.625 INCHES NOMINAL IN; Nominal Thread Diameter: 0.312 INCHES IN; Head Style: FLAT CHAMFER; Nondefinitive Spec/std Data: 6 TYPE. 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.