The Screw,close Tolerance, cataloged under National Stock Number 5305-00-324-9249, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-324-9249 |
| Primary Part Number | ST3M454-3L4 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 0.641 INCHES MINIMUM AND 0.671 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 | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 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 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.376 INCHES MINIMUM AND 0.385 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 |
|---|---|
| ST3M454-3L4 PRIMARY | Hi-Shear Corporation (USA) |
| WC4025L3-4 | West Coast Aerospace, Inc. (USA) |
| HT4025L3-4 PRIMARY | Huck International, Inc (USA) |
| ST3M454-3L4 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M454-3L4 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M454-3L4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4025L3-4 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M454-3L4 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L3-4 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4025L3-4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4025L3-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4025L3-4 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M454-3L4 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 11905-3L4 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-3L4 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| HT4025L3-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M454-3L4 PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M454-3L4 PRIMARY | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| HT4025L3-4 | 5/9 Secondary reference U.S. Government activity |
| ST3M454-3L4 | 5/9 Secondary reference Sps Technologies Inc |
| 10125186 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4025L3-4 | 5/2 Secondary reference U.S. Government activity |
| CHT4025-3-4 | 5/9 Secondary reference U.S. Government activity |
| CHT4025-3-4 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4025L3-4 | 5/9 Secondary reference Sps Technologies Inc |
| CHT4025-3-4 | 5/9 Secondary reference U.S. Government activity |
| ST3M454-3L4 | 3/2 Design control — primary reference U.S. Government activity |
| CHT4025-3-4 | 5/9 Secondary reference Deutsch Co the |
| ST3M454-3L4 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5305-00-324-9249 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-324-9249 has 18 manufacturer part numbers on file: ST3M454-3L4 (Hi-Shear Corporation), WC4025L3-4 (West Coast Aerospace, Inc.), HT4025L3-4 (Huck International, Inc), ST3M454-3L4 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M454-3L4 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc) and 13 more.
Key specifications for ST3M454-3L4: Fastener Length: 0.641 INCHES MINIMUM AND 0.671 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.