The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-511-0502, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-511-0502 |
| Primary Part Number | 7251277-C-020 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.094 INCHES NOMINAL IN |
| Head Height | 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A479 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 8 TYPE |
| Locking Feature | PATCH THREADS |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.298 INCHES MINIMUM AND 0.312 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 |
| Part Number | Manufacturer |
|---|---|
| 7251277-C-020 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| FF-S-86 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-511-0502 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-511-0502 has 1 manufacturer part number on file: 7251277-C-020 (Naval Sea Systems Command).
Key specifications for 7251277-C-020: Width Across Flats: 0.094 INCHES NOMINAL IN; Head Height: 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN; Fastener Length: 0.375 INCHES NOMINAL IN; Thread Length: 0.375 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.