The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-372-9402, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-372-9402 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 16.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES HEAD |
| Head Height | 0.200 INCHES NOMINAL IN |
| Fastener Length | 1.812 INCHES NOMINAL IN |
| Distance From Centerline to Flat | 0.2970 INCHES MINIMUM AND 0.3075 INCHES MAXIMUM IN |
| Thread Length | 0.531 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.125 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DEE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.281 INCHES NOMINAL IN |
| Grip Diameter | 0.3106 INCHES MINIMUM AND 0.3115 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP XM-12 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.563 INCHES MINIMUM AND 0.565 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.747 INCHES MINIMUM AND 0.749 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 |
| Reference | Meaning |
|---|---|
| 989-2-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-372-9402 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-372-9402: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 16.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES HEAD; Head Height: 0.200 INCHES NOMINAL IN. 19 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.