The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-293-5855, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-293-5855 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 0.820 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-23422 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.360 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | FF-S-86 TYPE VI FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DEE CHAMFER |
| Surface Treatment | CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 174B6503PC1(CHROME) | 5/1 Secondary reference Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory |
| 174B6503PC1 | 3/1 Design control — primary reference Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory |
NSN 5305-01-293-5855 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-293-5855: Fastener Length: 0.820 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-23422 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.360 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY. 13 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.