The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-428-7534, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Stauff Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-428-7534 |
| Primary Part Number | AF 2D U W3 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Stauff Corp |
| Status | ACTIVE |
| Head Height | 13.0 MILLIMETERS NOMINAL MM |
| Fastener Length | 20.0 MILLIMETERS NOMINAL MM |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE |
| Threads Per Inch | 18 CONCENTRIC HOLE |
| Style Designator | CONCENTRIC HOLE THREADED |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Nominal Thread Size | 0.312 INCHES CONCENTRIC HOLE IN |
| Width Between Flats | 12.0 MILLIMETERS NOMINAL MM |
| Internal Thread Class | 2B CONCENTRIC HOLE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| 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 |
|---|---|
| AF 2D U W3 PRIMARY | Stauff Corp (USA) |
| 6W0210 | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| AF-DS 2 | 5/9 Secondary reference Stauff Corp |
NSN 5306-01-428-7534 is a Bolt,internally Relieved Body, manufactured by Stauff Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-428-7534 has 2 manufacturer part numbers on file: AF 2D U W3 (Stauff Corp), 6W0210 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for AF 2D U W3: Head Height: 13.0 MILLIMETERS NOMINAL MM; Fastener Length: 20.0 MILLIMETERS NOMINAL MM; Thread Series: UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE; Threads Per Inch: 18 CONCENTRIC HOLE. 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.