The Screw,close Tolerance, cataloged under National Stock Number 5305-01-387-6540, 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 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-387-6540 |
| Primary Part Number | HT271-6-7 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Thread Length | 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.437 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM ALLOY 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 |
|---|---|
| HT271-6-7 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M430V6-7D | The Boeing Company Div Defense (USA) |
| HT271-6-7 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
NSN 5305-01-387-6540 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-387-6540 has 3 manufacturer part numbers on file: HT271-6-7 (Hi-Shear Corporation), ST3M430V6-7D (The Boeing Company Div Defense), HT271-6-7 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for HT271-6-7: Thread Length: 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.375 INCHES IN; Thread Direction: RIGHT-HAND; Grip Length: 0.437 INCHES NOMINAL IN. 8 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.