The Bolt,machine, cataloged under National Stock Number 5306-00-452-4971, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-452-4971 |
| Primary Part Number | A104-2B |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Head Height | 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Fastener Length | 0.600 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN |
| Thread Length | 0.307 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN |
| Material Document and Classification | S.80 FSCM K7766 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.263 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN |
| Width Between Flats | 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| A104-2B PRIMARY | Bsi Standards Limited (GBR) |
| A104-2B PRIMARY | Ufc Aerospace Europe Limited (GBR) |
| 991/4/00113/003 PRIMARY | Eaton Limited (GBR) |
| Reference | Meaning |
|---|---|
| 99-9506843 | 6/9 Informative reference only U.S. Government activity |
NSN 5306-00-452-4971 is a Bolt,machine, manufactured by Bsi Standards Limited, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-452-4971 has 3 manufacturer part numbers on file: A104-2B (Bsi Standards Limited), A104-2B (Ufc Aerospace Europe Limited), 991/4/00113/003 (Eaton Limited).
Key specifications for A104-2B: Head Height: 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN; Fastener Length: 0.600 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN; Thread Length: 0.307 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN; Material Document and Classification: S.80 FSCM K7766 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL. 13 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.