The Bolt,machine, cataloged under National Stock Number 5306-01-730-0198, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-730-0198 |
| Primary Part Number | ANSI B18.2.1.1/4-20UNC-2AX3/4-A2 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Head Height | 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN |
| External Thread Tolerance Class | 2A A |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.25 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.488 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | UNABLE TO DECODE |
| 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 |
|---|---|
| ANSI B18.2.1.1/4-20UNC-2AX3/4-A2 PRIMARY | The American Society of Mechanical Engineers (USA) |
| ANSI B18.2.1.1/4-20UNC-2AX3/4-A2 | Santa Barbara Sistemas Sa (ESP) |
| Reference | Meaning |
|---|---|
| ASME B18.2.1.1/4-20UNC-2AX3/4-A2 | 5/1 Secondary reference U.S. Government activity |
NSN 5306-01-730-0198 is a Bolt,machine, manufactured by The American Society of Mechanical Engineers, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-730-0198 has 2 manufacturer part numbers on file: ANSI B18.2.1.1/4-20UNC-2AX3/4-A2 (The American Society of Mechanical Engineers), ANSI B18.2.1.1/4-20UNC-2AX3/4-A2 (Santa Barbara Sistemas Sa).
Key specifications for ANSI B18.2.1.1/4-20UNC-2AX3/4-A2: Head Height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN; External Thread Tolerance Class: 2A A; Fastener Length: 0.750 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL IN. 12 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.