The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-678-9659, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-678-9659 |
| Primary Part Number | 71111-428-1 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| Head Height | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Fastener Length | 6.119 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-C-320,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE GRIP |
| Surface Treatment Document and Classification | QQ-C-320,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE SIDES OF HEAD |
| Thread Length | 0.650 INCHES MINIMUM IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6415 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | WATERTIGHT |
| Thread Direction | LEFT-HAND |
| Locking Feature | DISTORTIONS THREADS |
| Surface Treatment | CHROMIUM GRIP |
| Surface Treatment | CHROMIUM SIDES OF HEAD |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OR STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.370 INCHES NOMINAL 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 |
|---|---|
| 71111-428-1 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 695162 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| 730245 | 3/2 Design control — primary reference U.S. Government activity |
| 695162 | 3/9 Design control — primary reference U.S. Government activity |
| 695162 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-678-9659 is a Screw,cap,socket Head, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-678-9659 has 2 manufacturer part numbers on file: 71111-428-1 (Sps Technologies, Llc Dba PB Fasteners), 695162 (Huck International, Inc).
Key specifications for 71111-428-1: Width Across Flats: 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN; Head Height: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Fastener Length: 6.119 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-C-320,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE GRIP. 20 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.