The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-671-3692, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Aero Defence Pty Ltd. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-671-3692 |
| Primary Part Number | NAS629H50 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Aero Defence Pty Ltd |
| Status | ACTIVE |
| Extended Washer Thickness | 0.133 INCHES NOMINAL IN |
| Head Height | 0.557 INCHES NOMINAL IN |
| Fastener Length | 3.951 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.928 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | NAS624 THRU NAS644 NATIONAL STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.5625 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Specification/standard Data | 80205-NAS624 THRU NAS644 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 3.13 INCHES NOMINAL IN |
| Width Between Flats | 0.619 INCHES MINIMUM AND 0.628 INCHES MAXIMUM IN |
| Grip Diameter | 0.5605 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 39150 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL 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 |
|---|---|
| NAS629H50 | Aero Defence Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| NAS629 | 3/1 Design control — primary reference U.S. Government activity |
| NAS629H50 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-671-3692 is a Bolt,close Tolerance, manufactured by Aero Defence Pty Ltd, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-671-3692 has 1 manufacturer part number on file: NAS629H50 (Aero Defence Pty Ltd).
Key specifications for NAS629H50: Extended Washer Thickness: 0.133 INCHES NOMINAL IN; Head Height: 0.557 INCHES NOMINAL IN; Fastener Length: 3.951 INCHES NOMINAL IN; Extended Washer Diameter: 0.928 INCHES MINIMUM AND 0.938 INCHES MAXIMUM 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.