The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-448-0337, 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 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-448-0337 |
| Primary Part Number | 9628M21P15 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES TOP OF HEAD |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Head Height | 0.412 INCHES MINIMUM AND 0.432 INCHES MAXIMUM IN |
| Fastener Length | 1.250 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Thread Length | 0.772 INCHES MINIMUM AND 0.825 INCHES MAXIMUM IN |
| Material Document and Classification | C50T82A FSCM 07482 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.445 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.3905 INCHES MINIMUM AND 0.3910 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 9628M21P15 PRIMARY | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 5306PL1495408 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5306-00-448-0337 is a Bolt,close Tolerance, manufactured by General Electric Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-448-0337 has 1 manufacturer part number on file: 9628M21P15 (General Electric Company).
Key specifications for 9628M21P15: Surface Finish: 125.0 MICROINCHES TOP OF HEAD; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM 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.