The Screw,close Tolerance, cataloged under National Stock Number 5305-01-267-9291, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-267-9291 |
| Primary Part Number | HT4075D4-7-21 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Fastener Length | 0.890 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.453 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 UNS S13800 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 73197-HT4075 MANUFACTURERS STANDARD |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.249 INCHES MINIMUM AND 0.250 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) |
| 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 |
|---|---|
| HT4075D4-7-21 PRIMARY | Huck International, Inc (USA) |
| HT4075D4-7-21 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4075D4-7-21 | Howmet Global Fastening Systems Inc (USA) |
| HT4075D4-7-21 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4075D4-7-21 | 5/2 Secondary reference U.S. Government activity |
| HT4075D4-7-21 | 5/9 Secondary reference U.S. Government activity |
| HT4075D4-7-21 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-267-9291 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-267-9291 has 4 manufacturer part numbers on file: HT4075D4-7-21 (Huck International, Inc), HT4075D4-7-21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4075D4-7-21 (Howmet Global Fastening Systems Inc), HT4075D4-7-21 (Hi-Shear Corporation).
Key specifications for HT4075D4-7-21: Fastener Length: 0.890 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.453 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 UNS S13800 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.