The Bolt,assembled Washer, cataloged under National Stock Number 5306-01-423-0891, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Buena Park Tool & Engineering, Inc Dba Buena Park Tool. Government technical data includes 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-423-0891 |
| Primary Part Number | 13D0021-434 |
| Item Name | Bolt,assembled Washer |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Buena Park Tool & Engineering, Inc Dba Buena Park Tool |
| Status | ACTIVE |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 2.703 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Primary Washer Outside Diameter | 0.600 INCHES NOMINAL IN |
| Thread Length | 0.578 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | ASTM A582, COND A ASSN STD SINGLE MATERIAL RESPONSE STAND-OFF |
| Material Document and Classification | MIL-S-5000, COND A MIL SPEC SINGLE MATERIAL RESPONSE FIRST SHOULDER |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DISHED HEXAGON |
| Primary Washer Style | SPRING TENSION |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.032 INCHES NOMINAL IN |
| Width Between Flats | 0.554 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 95000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 FASTENER |
| Material | STEEL COMP 303SE STAND-OFF |
| Material | STEEL COMP 301 FIRST SHOULDER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Quantity | 1 |
| 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 |
|---|---|
| 13D0021-434 PRIMARY | Buena Park Tool & Engineering, Inc Dba Buena Park Tool (USA) |
| 13D0021-434 PRIMARY | American Metals & Machining (USA) |
| Reference | Meaning |
|---|---|
| 13D0021-434 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-423-0891 is a Bolt,assembled Washer, manufactured by Buena Park Tool & Engineering, Inc Dba Buena Park Tool, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-423-0891 has 2 manufacturer part numbers on file: 13D0021-434 (Buena Park Tool & Engineering, Inc Dba Buena Park Tool), 13D0021-434 (American Metals & Machining).
Key specifications for 13D0021-434: Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 2.703 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Primary Washer Outside Diameter: 0.600 INCHES NOMINAL IN. 24 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.