The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-107-6590, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-107-6590 |
| Primary Part Number | 74B450985-2001 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN |
| Fastener Length | 1.376 INCHES NOMINAL IN |
| Thread Length | 0.438 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5731 NATIONAL SPEC SINGLE MATERIAL RESPONSE OR AMS5737 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS6305 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.938 INCHES NOMINAL IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.184 INCHES NOMINAL FIRST HOLE 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 |
|---|---|
| 74B450985-2001 PRIMARY | The Boeing Company Div Defense (USA) |
| 74B450985-2001 | Safran Landing Systems Canada Inc. (CAN) |
| 74B450985-2001 | Nassau Tool Works, Inc (USA) |
| Reference | Meaning |
|---|---|
| 10115725 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74B450985-2001 | 5/9 Secondary reference All Tools, Inc. Dba E2 Precision Products |
NSN 5306-01-107-6590 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-107-6590 has 3 manufacturer part numbers on file: 74B450985-2001 (The Boeing Company Div Defense), 74B450985-2001 (Safran Landing Systems Canada Inc.), 74B450985-2001 (Nassau Tool Works, Inc).
Key specifications for 74B450985-2001: Head Height: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN; Fastener Length: 1.376 INCHES NOMINAL IN; Thread Length: 0.438 INCHES NOMINAL IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE 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.