The Screw,close Tolerance, cataloged under National Stock Number 5305-00-040-9453, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 16 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-040-9453 |
| Primary Part Number | HT4025L5D34 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 2.576 INCHES MINIMUM AND 2.623 INCHES MAXIMUM IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 08524-B-19019 MANUFACTURERS STANDARD |
| Grip Length | 2.115 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.509 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.625 INCHES MINIMUM AND 0.635 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 |
|---|---|
| HT4025L5D34 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4025L5D34 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11905-5D34 | Reid Products Inc. Dba Reid Products Inc (USA) |
| WC4025L-5D34 | West Coast Aerospace, Inc. (USA) |
| ST3M454-5DL34 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L5D34 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M454-5D34 | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| HT295-5D34 | 5/9 Secondary reference Hi-Shear Corporation |
| BM19019-5D34 | 5/9 Secondary reference U.S. Government activity |
| 106830-5D34 | 5/9 Secondary reference Sps Technologies Inc |
| 106830-5D34 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M454-5DL34 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT8140-5D34 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4D25L5D34 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M454-5D34 | 5/9 Secondary reference U.S. Government activity |
| HT4025L5D34 | 5/9 Secondary reference Sps Technologies Inc |
| ST3M454-5D34 | 5/9 Secondary reference Sps Technologies Ltd, Tj Brooks Division |
| ST3M454-5D34 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| HT8140-5D34 | 5/9 Secondary reference U.S. Government activity |
| ST3M454-5D34 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4025L5D34 | 5/2 Secondary reference U.S. Government activity |
| ST3M454-5D34 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-00-040-9453 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-040-9453 has 6 manufacturer part numbers on file: HT4025L5D34 (Sps Technologies Ltd, Tj Brooks Division), HT4025L5D34 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11905-5D34 (Reid Products Inc. Dba Reid Products Inc), WC4025L-5D34 (West Coast Aerospace, Inc.), ST3M454-5DL34 (Fastener Innovation Technology, Inc. Dba F I T) and 1 more.
Key specifications for HT4025L5D34: Fastener Length: 2.576 INCHES MINIMUM AND 2.623 INCHES MAXIMUM IN; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN; Nominal Thread Diameter: 0.312 INCHES IN. 18 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.