The Bolt,machine, cataloged under National Stock Number 5306-00-276-8191, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Dresser Industries Inc Leroi Div. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-276-8191 |
| Primary Part Number | M34-1 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Dresser Industries Inc Leroi Div |
| Status | ACTIVE |
| Head Height | 0.312 INCHES NOMINAL IN |
| Fastener Length | 3.719 INCHES NOMINAL IN |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | QQ-S-624,FS4140 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.781 INCHES NOMINAL IN |
| Width Between Flats | 1.250 INCHES NOMINAL IN |
| Askewed Head Angle | 15.0 DEGREES NOMINAL |
| Countersink Angle | 30.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5306-00-276-8191 is a Bolt,machine, manufactured by Dresser Industries Inc Leroi Div, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-276-8191 has 2 manufacturer part numbers on file: M34-1 (Dresser Industries Inc Leroi Div), AM34-1 (Dresser Industries Inc Leroi Div).
Key specifications for M34-1: Head Height: 0.312 INCHES NOMINAL IN; Fastener Length: 3.719 INCHES NOMINAL IN; Thread Length: 1.000 INCHES MINIMUM IN; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL. 17 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.