The Screw,close Tolerance, cataloged under National Stock Number 5305-01-674-6281, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Airbus Defence and Space Sau. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-674-6281 |
| Primary Part Number | NAS1581K4R10G |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Airbus Defence and Space Sau |
| Status | ACTIVE |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| NAS1581K4R10G | Airbus Defence and Space Sau (ESP) |
| Reference | Meaning |
|---|---|
| NAS1581K4R10G | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-674-6281 is a Screw,close Tolerance, manufactured by Airbus Defence and Space Sau, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-674-6281 has 1 manufacturer part number on file: NAS1581K4R10G (Airbus Defence and Space Sau).
Key specifications for NAS1581K4R10G: Nominal Thread Diameter: 0.2500 INCHES IN; Head Style: FLAT COUNTERSUNK; Thread Direction: RIGHT-HAND; Countersink Angle: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM. 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.