The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-169-0688, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-169-0688 |
| Primary Part Number | 431B501PC23 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Width Across Flats | 0.562 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Head Height | 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | F70A2E,FSCM 01289 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD |
| Surface Treatment Document and Classification | F70A2E,FSCM 01289 MFR REF SINGLE TREATMENT RESPONSE THREADS |
| Thread Length | 1.000 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A193 GR B16 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-S-1222 GR B16 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.500 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | COPPER BEARING SURFACE OF HEAD |
| Surface Treatment | COPPER THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.988 INCHES MINIMUM AND 1.000 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 |
|---|---|
| 431B501PC23 PRIMARY | General Electric Company (USA) |
| PL-7378E65 PIECE 143 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 431B501 PIECE 2 | C/1 Advisory reference — outside the item-of-supply concept General Electric Company |
NSN 5306-01-169-0688 is a Bolt,internal Wrenching, manufactured by General Electric Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-169-0688 has 2 manufacturer part numbers on file: 431B501PC23 (General Electric Company), PL-7378E65 PIECE 143 (General Electric Company).
Key specifications for 431B501PC23: Width Across Flats: 0.562 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN; Head Height: 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Fastener Length: 1.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: F70A2E,FSCM 01289 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD. 20 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.