The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-678-3288, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-678-3288 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416, TYPE II, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.182 INCHES NOMINAL IN |
| Material Document and Classification | AMS6382 4140 (UNS G14400), AMS6415 (UNS G43406) NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.1640 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH LOCKING FEATURE |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.319 INCHES MINIMUM AND 0.332 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 |
|---|---|
| NAS1189-08P4B | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-678-3288 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-678-3288: Fastener Length: 0.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS-QQ-P-416, TYPE II, CLASS 2 NATIONAL STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.182 INCHES NOMINAL IN; Material Document and Classification: AMS6382 4140 (UNS G14400), AMS6415 (UNS G43406) NATIONAL STD SINGLE MATERIAL 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.