The Bolt,machine, cataloged under National Stock Number 5306-00-452-4972, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-452-4972 |
| Primary Part Number | 4A-104 |
| 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 | 0.700 INCHES MINIMUM AND 0.740 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 | 0.363 INCHES MINIMUM AND 0.393 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 |
|---|---|
| 4A-104 PRIMARY | Bsi Standards Limited (GBR) |
| Reference | Meaning |
|---|---|
| 79801256005 | 5/9 Secondary reference Lucas Aerospace Ltd (electronic Systems & Equipment Div) |
| 99-9434448 | 6/9 Informative reference only U.S. Government activity |
| 3A104-3B | C/1 Advisory reference — outside the item-of-supply concept Ufc Aerospace Europe Limited |
| 3A104-3B | 5/9 Secondary reference Bas Components Limited |
| A104-3B | 5/9 Secondary reference Bas Components Limited |
| A104-3B | 5/9 Secondary reference Bsi Standards Limited |
NSN 5306-00-452-4972 is a Bolt,machine, manufactured by Bsi Standards Limited, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-452-4972 has 1 manufacturer part number on file: 4A-104 (Bsi Standards Limited).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-171-6505. Verify interchangeability with system specifications before substitution.
Key specifications for 4A-104: Head Height: 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN; Fastener Length: 0.700 INCHES MINIMUM AND 0.740 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.