The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-252-5291, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Tacoma Screw Products, Inc. Dba Tacoma Screw Products Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-252-5291 |
| Primary Part Number | 125-405 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Tacoma Screw Products, Inc. Dba Tacoma Screw Products Inc |
| Status | ACTIVE |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 80.0 ROCKWELL B MINIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 70000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 125-405 PRIMARY | Tacoma Screw Products, Inc. Dba Tacoma Screw Products Inc (USA) |
| Reference | Meaning |
|---|---|
| FF-S-86 TY 6 | 4/1 Identification reference U.S. Government activity |
| 1/4-20UNC-2AX3/4IN,LGTY2GR316 | 5/9 Secondary reference U.S. Government activity |
| 1/4-20UNC-2AX3/ 4"LG TYII GR316 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-252-5291 is a Screw,cap,socket Head, manufactured by Tacoma Screw Products, Inc. Dba Tacoma Screw Products Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-252-5291 has 1 manufacturer part number on file: 125-405 (Tacoma Screw Products, Inc. Dba Tacoma Screw Products Inc).
8 possible matches (shared part number, not a government interchangeability claim): 5305-01-319-0384, 5305-01-320-3534, 5305-01-331-1262. Verify interchangeability with system specifications before substitution.
Key specifications for 125-405: Fastener Length: 0.750 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 80.0 ROCKWELL B MINIMUM OVERALL; Nominal Thread Diameter: 0.250 INCHES IN. 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.