The Bolt,machine, cataloged under National Stock Number 5306-01-524-0773, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-524-0773 |
| Primary Part Number | NAS428H4A6 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Head Height | 0.141 INCHES NOMINAL IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN |
| Hole Configuration Style | HEXAGON FLATS |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | CROWNED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.438 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.046 INCHES NOMINAL IN |
| 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 |
|---|---|
| NAS428H4A6 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 5306PL1928767 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| NAS428H4A6 | 3/2 Design control — primary reference U.S. Government activity |
| NAS428H4A6 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
NSN 5306-01-524-0773 is a Bolt,machine, manufactured by The Boeing Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-524-0773 has 1 manufacturer part number on file: NAS428H4A6 (The Boeing Company).
Key specifications for NAS428H4A6: Head Height: 0.141 INCHES NOMINAL IN; Fastener Length: 0.750 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN. 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.