The Screw,close Tolerance, cataloged under National Stock Number 5305-00-522-9630, 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 17 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-522-9630 |
| Primary Part Number | HT4025L4D15 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.392 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 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) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.271 INCHES MINIMUM AND 1.311 INCHES MAXIMUM FIRST HOLE IN |
| 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 | F |
| Part Number | Manufacturer |
|---|---|
| ST3M454-4DL15 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L4D15 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4025L4D15 | Huck International, Inc (USA) |
| ST3M454-4DL15 | Houston Precision Fasteners I Lp (USA) |
| 11905-4DL15 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-4DL15 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4025L4D15 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4025L4D15 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4025L4D15 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4025L4D15 PRIMARY | Hi-Shear Corporation (USA) |
| WC4025L-4D15 | West Coast Aerospace, Inc. (USA) |
| ST3M454-4DL15 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M454-4DL15 | Heartland Precision Fasteners Inc (USA) |
| HT4025L4D15 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M454-4DL15 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4D15 | 5/9 Secondary reference Fairchild Fasteners Europe - Vsd Gmbh |
| ST3M454-4DL15 | 5/9 Secondary reference Sps Technologies Ltd, Tj Brooks Division |
| HT4025L4D15 | 5/2 Secondary reference U.S. Government activity |
| ST3M454-4DL15 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4D15 | 3/9 Design control — primary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| HT4025L4D15 | 5/9 Secondary reference Satair A/s |
| HT4025L4D15 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-522-9630 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-522-9630 has 14 manufacturer part numbers on file: ST3M454-4DL15 (Fastener Innovation Technology, Inc. Dba F I T), HT4025L4D15 (Sps Technologies Ltd, Tj Brooks Division), HT4025L4D15 (Huck International, Inc), ST3M454-4DL15 (Houston Precision Fasteners I Lp), 11905-4DL15 (Reid Products Inc. Dba Reid Products Inc) and 9 more.
Key specifications for HT4025L4D15: Fastener Length: 1.392 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN; Nominal Thread Diameter: 0.250 INCHES IN. 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.