The Bolt,machine, cataloged under National Stock Number 5306-00-174-1640, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-174-1640 |
| Primary Part Number | 651009 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Extended Washer Thickness | 0.031 INCHES NOMINAL IN |
| Head Height | 0.094 INCHES NOMINAL IN |
| Fastener Length | 0.406 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.531 INCHES NOMINAL IN |
| Thread Length | 0.406 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.078 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | UNFINISHED HEAD |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.344 INCHES NOMINAL IN |
| Width Between Flats | 0.406 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | MAGNESIUM OVERALL |
| Thread Series Designator | UNEF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.281 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 |
|---|---|
| 651009 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5306-00-174-1640 is a Bolt,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-174-1640 has 1 manufacturer part number on file: 651009 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
2 possible matches (shared part number, not a government interchangeability claim): 4720-00-354-6510, 1660-00-677-5860. Verify interchangeability with system specifications before substitution.
Key specifications for 651009: Extended Washer Thickness: 0.031 INCHES NOMINAL IN; Head Height: 0.094 INCHES NOMINAL IN; Fastener Length: 0.406 INCHES NOMINAL IN; Extended Washer Diameter: 0.531 INCHES NOMINAL 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.