The Screw,close Tolerance, cataloged under National Stock Number 5305-01-129-7596, 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 19 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-129-7596 |
| Primary Part Number | HT4025L4D7 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 0.892 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.24950 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 COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.771 INCHES MINIMUM AND 0.811 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 | X |
| Part Number | Manufacturer |
|---|---|
| HT4025L4D7 PRIMARY | Hi-Shear Corporation (USA) |
| HT4025L4D7 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11905-4DL7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4025L4D7 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M454-4DL7 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4025L4D7 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4D7 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 10115210 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4025L4D7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-129-7596 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-7596 has 3 manufacturer part numbers on file: HT4025L4D7 (Hi-Shear Corporation), HT4025L4D7 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11905-4DL7 (Reid Products Inc. Dba Reid Products Inc).
Key specifications for HT4025L4D7: Fastener Length: 0.892 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN. 19 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.