The Bolt,machine, cataloged under National Stock Number 5306-00-272-4233, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-272-4233 |
| Primary Part Number | A1634 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. |
| Status | ACTIVE |
| Head Height | 0.234 INCHES NOMINAL IN |
| Fastener Length | 3.750 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Hardness Rating | 248.0 BRINELL STANDARD MINIMUM AND 285.0 BRINELL STANDARD MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.078 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 1035 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.625 INCHES NOMINAL FIRST HOLE IN |
| 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 |
|---|---|
| A1634 PRIMARY | Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA) |
| Reference | Meaning |
|---|---|
| A1634 | 5/9 Secondary reference U.S. Government activity |
| 472767 | 5/9 Secondary reference Wabco Construction and Mining Equipment Group Indianapolis Plant an American Standard Inc Co |
NSN 5306-00-272-4233 is a Bolt,machine, manufactured by Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp., classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-272-4233 has 1 manufacturer part number on file: A1634 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.).
5 possible matches (shared part number, not a government interchangeability claim): 5905-01-493-5563, 8455-01-528-8460, 8455-01-664-2643. Verify interchangeability with system specifications before substitution.
Key specifications for A1634: Head Height: 0.234 INCHES NOMINAL IN; Fastener Length: 3.750 INCHES NOMINAL IN; Thread Length: 0.875 INCHES MINIMUM IN; Hardness Rating: 248.0 BRINELL STANDARD MINIMUM AND 285.0 BRINELL STANDARD MAXIMUM OVERALL. 16 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.