The Screw Assembly,panel, cataloged under National Stock Number 5305-01-320-2750, 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 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-320-2750 |
| Primary Part Number | 401-6357159-1 |
| Item Name | Screw Assembly,panel |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Head Height | 1.250 INCHES NOMINAL IN |
| Fastener Length | 5.810 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Accommodated Thickness | 0.940 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-24111,TY 1,COND 1,FIN A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.510 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 401-6357159-1 PRIMARY | Naval Sea Systems Command (USA) |
| 401-6357155 IT 3 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 401-6357159-1 | 5/2 Secondary reference U.S. Government activity |
| 401-6357159-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-320-2750 is a Screw Assembly,panel, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-320-2750 has 2 manufacturer part numbers on file: 401-6357159-1 (Naval Sea Systems Command), 401-6357155 IT 3 (Naval Sea Systems Command).
Key specifications for 401-6357159-1: Width Across Flats: 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN; Head Height: 1.250 INCHES NOMINAL IN; Fastener Length: 5.810 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 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.