The Screw,close Tolerance, cataloged under National Stock Number 5305-01-680-5937, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Genuine Aircraft Hardware Co. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-680-5937 |
| Primary Part Number | NAS8603-9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Genuine Aircraft Hardware Co |
| Status | ACTIVE |
| Fastener Length | 0.885 INCHES NOMINAL IN |
| Thread Length | 0.323 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.070 INCHES NOMINAL OVERALL IN |
| Nominal Thread Diameter | 0.1900 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Specification/standard Data | 80205-NAS8603 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.562 INCHES NOMINAL IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | CRUCIFORM RIBBED |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.00 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4340 AND STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.266 INCHES MINIMUM AND 0.303 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 |
|---|---|
| NAS8603-9 PRIMARY | Genuine Aircraft Hardware Co (USA) |
| Reference | Meaning |
|---|---|
| NAS8603 | 5/1 Secondary reference U.S. Government activity |
NSN 5305-01-680-5937 is a Screw,close Tolerance, manufactured by Genuine Aircraft Hardware Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-680-5937 has 1 manufacturer part number on file: NAS8603-9 (Genuine Aircraft Hardware Co).
Key specifications for NAS8603-9: Fastener Length: 0.885 INCHES NOMINAL IN; Thread Length: 0.323 INCHES NOMINAL IN; Shank Unthreaded Hole Diameter: 0.070 INCHES NOMINAL OVERALL IN; Nominal Thread Diameter: 0.1900 INCHES IN. 18 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.