The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-682-3349, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-682-3349 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Head Height | 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Fastener Length | 1.00 INCHES NOMINAL IN |
| Thread Length | 0.250 INCHES MINIMUM IN |
| Material Document and Classification | K-MONEL 500 PER MIL-S-001222G AND MIL-B-857 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL G |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81349-MIL-DTL-1222J GOVERNMENT SPECIFICATION |
| Chamfer Angle | 30.0 DEGREES MINIMUM AND 45.0 DEGREES MAXIMUM |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.550 INCHES MINIMUM AND 0.562 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 |
|---|---|
| H861-6000-115 | 5/1 Secondary reference U.S. Government activity |
| 92-08-3100A | 5/1 Secondary reference Bek, Inc. Dba Level 1 Fasteners |
| M1222SN6C316NCNN | 2/2 Government specification standardization U.S. Government activity |
| 92-08-3100A | 5/1 Secondary reference U.S. Government activity |
| 741-8217287-115 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5305-01-682-3349 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-682-3349: Width Across Flats: 0.312 INCHES NOMINAL IN; Head Height: 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Fastener Length: 1.00 INCHES NOMINAL IN; Thread Length: 0.250 INCHES MINIMUM IN. 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.