The Screw,close Tolerance, cataloged under National Stock Number 5305-01-043-4301, 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 6 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-043-4301 |
| Primary Part Number | HT239PB-5-10 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES THREADS |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Specification/standard Data | 26512-GB510L MANUFACTURERS STANDARD |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| HT239PB-5-10 PRIMARY | Hi-Shear Corporation (USA) |
| HT239PB-5-10 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| GB510L5-10 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| HT8043-5-10 | 5/9 Secondary reference U.S. Government activity |
| A147-5-10 | 5/9 Secondary reference U.S. Government activity |
| 106750-5-10 | 3/2 Design control — primary reference U.S. Government activity |
| GB510L5-10 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| BM19025-5-10 | 5/9 Secondary reference U.S. Government activity |
| A147-5-10 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM19025-5-10 | 5/9 Secondary reference U.S. Government activity |
| HT8043-5-10 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| GB510L5-10 | 5/2 Secondary reference U.S. Government activity |
| BM19025-5-10 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5305-01-043-4301 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-043-4301 has 3 manufacturer part numbers on file: HT239PB-5-10 (Hi-Shear Corporation), HT239PB-5-10 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), GB510L5-10 (Huck International, Inc).
Key specifications for HT239PB-5-10: Surface Finish: 63.0 MICROINCHES THREADS; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Specification/standard Data: 26512-GB510L MANUFACTURERS STANDARD; Surface Treatment: CADMIUM AND CHROMATE OVERALL. 6 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.