The Bolt,machine, cataloged under National Stock Number 5306-01-398-3600, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-398-3600 |
| Primary Part Number | 91272A770 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Extended Washer Thickness | 0.129 INCHES NOMINAL IN |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 2.500 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 1.500 INCHES NOMINAL IN |
| Hardness Rating | 37.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.493 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 170000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRF |
| 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 |
|---|---|
| 91272A770 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 91271A770 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
| 91272A722 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
NSN 5306-01-398-3600 is a Bolt,machine, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-398-3600 has 1 manufacturer part number on file: 91272A770 (Mcmaster-Carr Supply Co).
Key specifications for 91272A770: Extended Washer Thickness: 0.129 INCHES NOMINAL IN; Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 2.500 INCHES NOMINAL IN; Extended Washer Diameter: 0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN. 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.