The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-902-8564, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Westinghouse Electric Corp. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-902-8564 |
| Primary Part Number | 502C643H02 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OVERALL |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Fastener Length | 1.750 INCHES NOMINAL IN |
| Thread Length | 0.687 INCHES MINIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 34.9 ROCKWELL C MAXIMUM OVERALL |
| First Diameter From Head | 0.495 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.938 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.063 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.688 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.125 INCHES NOMINAL IN |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Third Diameter From Head | 0.485 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 502C643H02 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 502C643H02 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 502C643H02 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-902-8564 is a Bolt,internal Wrenching, manufactured by Westinghouse Electric Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-902-8564 has 1 manufacturer part number on file: 502C643H02 (Westinghouse Electric Corp).
Key specifications for 502C643H02: Surface Finish: 63.0 MICROINCHES OVERALL; Width Across Flats: 0.562 INCHES NOMINAL IN; Fastener Length: 1.750 INCHES NOMINAL IN; Thread Length: 0.687 INCHES MINIMUM 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.