The Bolt,machine, cataloged under National Stock Number 5306-01-057-5959, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Twin Manufacturing Co Dba Twin Mro. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-057-5959 |
| Primary Part Number | PWA50921-2 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Twin Manufacturing Co Dba Twin Mro |
| Status | ACTIVE |
| Fastener Length | 1.750 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | OXIDE OVERALL |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| PWA50921-2 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| PWA50921-2 PRIMARY | Twin Manufacturing Co Dba Twin Mro (USA) |
NSN 5306-01-057-5959 is a Bolt,machine, manufactured by Twin Manufacturing Co Dba Twin Mro, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-057-5959 has 2 manufacturer part numbers on file: PWA50921-2 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), PWA50921-2 (Twin Manufacturing Co Dba Twin Mro).
Key specifications for PWA50921-2: Fastener Length: 1.750 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Nominal Thread Diameter: 0.375 INCHES IN; Head Style: HEXAGON. 9 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.