The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-604-5771, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Transpec Fasteners, Inc. Dba Transpec Fasteners Inc. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-604-5771 |
| Primary Part Number | TSF8C25KCLAP |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Transpec Fasteners, Inc. Dba Transpec Fasteners Inc |
| Status | ACTIVE |
| Width Across Flats | 0.078 INCHES NOMINAL IN |
| Head Height | 0.083 INCHES NOMINAL IN |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | DOD-P-16232,TY Z,CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.250 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A574,HEAT TREATED ALLOY STEEL ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PHOSPHATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.270 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 |
|---|---|
| AESA4U164250BB3LE1 | The American Society of Mechanical Engineers (USA) |
| TSF8C25KCLAP PRIMARY | Transpec Fasteners, Inc. Dba Transpec Fasteners Inc (USA) |
NSN 5305-01-604-5771 is a Screw,cap,socket Head, manufactured by Transpec Fasteners, Inc. Dba Transpec Fasteners Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-604-5771 has 2 manufacturer part numbers on file: AESA4U164250BB3LE1 (The American Society of Mechanical Engineers), TSF8C25KCLAP (Transpec Fasteners, Inc. Dba Transpec Fasteners Inc).
Key specifications for TSF8C25KCLAP: Width Across Flats: 0.078 INCHES NOMINAL IN; Head Height: 0.083 INCHES NOMINAL IN; Fastener Length: 0.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: DOD-P-16232,TY Z,CL 1 FED SPEC SINGLE TREATMENT 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.