The Screw,close Tolerance, cataloged under National Stock Number 5305-01-133-3880, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is West Coast Aerospace, Inc.. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-133-3880 |
| Primary Part Number | WC4025L-4-24 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | West Coast Aerospace, Inc. |
| Status | ACTIVE |
| Fastener Length | 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.497 INCHES MINIMUM AND 0.507 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 |
| Part Number | Manufacturer |
|---|---|
| WC4025L-4-24 PRIMARY | West Coast Aerospace, Inc. (USA) |
| 11905-4L24 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-4L24 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L4-24 PRIMARY | Hi-Shear Corporation (USA) |
| HT4025L4-24 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| HT4025L4-24 | 5/9 Secondary reference U.S. Government activity |
| ST3M454-4L24 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4025L4-24 | 3/2 Design control — primary reference U.S. Government activity |
| HT4025L4-24 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4-24 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-01-133-3880 is a Screw,close Tolerance, manufactured by West Coast Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-3880 has 5 manufacturer part numbers on file: WC4025L-4-24 (West Coast Aerospace, Inc.), 11905-4L24 (Reid Products Inc. Dba Reid Products Inc), ST3M454-4L24 (Fastener Innovation Technology, Inc. Dba F I T), HT4025L4-24 (Hi-Shear Corporation), HT4025L4-24 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for WC4025L-4-24: Fastener Length: 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 17 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.