The Screw,close Tolerance, cataloged under National Stock Number 5305-01-133-4474, 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 16 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-133-4474 |
| Primary Part Number | WC4024L3-20 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | West Coast Aerospace, Inc. |
| Status | ACTIVE |
| Fastener Length | 1.641 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN |
| Thread Length | 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 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 | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.297 INCHES MINIMUM AND 0.302 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 |
|---|---|
| ST3M455-3L20-1 | Houston Precision Fasteners I Lp (USA) |
| WC4024L3-20 PRIMARY | West Coast Aerospace, Inc. (USA) |
| HT4024L3-20 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4024L3-20 PRIMARY | Huck International, Inc (USA) |
| HT4024L3-20 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4024L3-20 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M455-3L20-1 | Heartland Precision Fasteners Inc (USA) |
| HT4024L3-20 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M455-3L20-1 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4024L3-20 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M455-3L20-1 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4024L3-20 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11907-3L20-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4024L3-20 | 5/9 Secondary reference U.S. Government activity |
| HT4024L3-20 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M455-3L20-1 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4024L3-20 | 5/9 Secondary reference U.S. Government activity |
| 10115344 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4024L3-20 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-01-133-4474 is a Screw,close Tolerance, manufactured by West Coast Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-4474 has 13 manufacturer part numbers on file: ST3M455-3L20-1 (Houston Precision Fasteners I Lp), WC4024L3-20 (West Coast Aerospace, Inc.), HT4024L3-20 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HT4024L3-20 (Huck International, Inc), HT4024L3-20 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 8 more.
Key specifications for WC4024L3-20: Fastener Length: 1.641 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN; Thread Length: 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN; Material Document and Classification: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.190 INCHES IN. 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.