The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-129-4434, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Saf-Holland, Inc.. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-129-4434 |
| Primary Part Number | XA-1021-3 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Saf-Holland, Inc. |
| Status | ACTIVE |
| Fastener Length | 1.750 INCHES NOMINAL IN |
| Internal Thread Length | 0.156 INCHES NOMINAL CONCENTRIC HOLE IN |
| Thread Series | UNF CONCENTRIC HOLE |
| Threads Per Inch | 28 CONCENTRIC HOLE |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES CONCENTRIC HOLE IN |
| Concentric Hole Diameter | 0.219 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1021 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 |
| Part Number | Manufacturer |
|---|---|
| XA-1021-3 PRIMARY | Saf-Holland, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1021-3 | 5/9 Secondary reference Saf-Holland, Inc. |
NSN 5306-01-129-4434 is a Bolt,internally Relieved Body, manufactured by Saf-Holland, Inc., classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-129-4434 has 1 manufacturer part number on file: XA-1021-3 (Saf-Holland, Inc.).
Key specifications for XA-1021-3: Fastener Length: 1.750 INCHES NOMINAL IN; Internal Thread Length: 0.156 INCHES NOMINAL CONCENTRIC HOLE IN; Thread Series: UNF CONCENTRIC HOLE; Threads Per Inch: 28 CONCENTRIC HOLE. 14 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.