The Screw,close Tolerance, cataloged under National Stock Number 5305-00-522-9628, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 19 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-522-9628 |
| Primary Part Number | ST3M454-4L10 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.079 INCHES MINIMUM AND 1.109 INCHES MAXIMUM IN |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.615 INCHES MINIMUM AND 0.635 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 CORROSION RESISTING 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 |
|---|---|
| HT4025L4-10 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4025L4-10 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| HT4025L4-10 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M454-4L10 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M454-4L10 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4025L4-10 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11905-4L10 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4025L4-10 | Huck International, Inc (USA) |
| ST3M454-4L10 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4025L4-10 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4025L4-10 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4025L4-10 | Howmet Global Fastening Systems Inc (USA) |
| WC4025-4-10 | West Coast Aerospace, Inc. (USA) |
| ST3M454-4L10 | West Coast Aerospace, Inc. (USA) |
| HT4025L4-10 | Satair A/s (DNK) |
| ST3M454-4L10 | Houston Precision Fasteners I Lp (USA) |
| HT4025L4-10 | Hi-Shear Corporation (USA) |
| ST3M454-4L10 | Heartland Precision Fasteners Inc (USA) |
| ST3M454-4L10 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M454-4L10 | 5/9 Secondary reference U.S. Government activity |
| CHT4025-4-10 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4-10 | 5/9 Secondary reference U.S. Government activity |
| 10125353 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4025L4-10 | 5/2 Secondary reference U.S. Government activity |
| CHT4025-4-10 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4-10 | 5/9 Secondary reference U.S. Government activity |
| CHT4025-4-10 | 5/9 Secondary reference Deutsch Co the |
| CHT4025-4-10 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| ST3M4544L10-1 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4025L4-10 | 5/9 Secondary reference Sps Technologies Inc |
| ST3M454-4L10 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| ST3M454-4L10 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5305-00-522-9628 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-522-9628 has 19 manufacturer part numbers on file: HT4025L4-10 (Sps Technologies, Llc Dba PB Fasteners), HT4025L4-10 (Fairchild Fasteners Europe - Vsd Gmbh), HT4025L4-10 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M454-4L10 (Fastener Innovation Technology, Inc. Dba F I T), ST3M454-4L10 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 14 more.
Key specifications for ST3M454-4L10: Fastener Length: 1.079 INCHES MINIMUM AND 1.109 INCHES MAXIMUM IN; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN; Head Style: FLAT COUNTERSUNK. 15 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.