The Bolt,machine, cataloged under National Stock Number 5306-01-648-3008, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Fastener Technology Corp. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-648-3008 |
| Primary Part Number | NAS428CK4A6 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Fastener Technology Corp |
| Status | ACTIVE |
| Head Height | 0.141 INCHES NOMINAL IN |
| Fastener Length | 1.953 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.438 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | IRON ALLOY 660 OVERALL |
| 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 |
|---|---|
| NAS428CK4A6 | Fastener Technology Corp (USA) |
| NAS428CK4A6 | Saturn Fasteners Inc (USA) |
| NAS428CK4A6 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| NAS428CK4A6 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| NAS428CK4A6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| NAS428CK4A6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| NAS428CK4A6 | 5/2 Secondary reference U.S. Government activity |
| NAS428 | 3/1 Design control — primary reference U.S. Government activity |
| NAS428CK4A6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-648-3008 is a Bolt,machine, manufactured by Fastener Technology Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-648-3008 has 6 manufacturer part numbers on file: NAS428CK4A6 (Fastener Technology Corp), NAS428CK4A6 (Saturn Fasteners Inc), NAS428CK4A6 (Howmet Global Fastening Systems Inc Div City of Industry Operations), NAS428CK4A6 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), NAS428CK4A6 (Sps Technologies, Llc Dba PB Fasteners) and 1 more.
3 possible matches (shared part number, not a government interchangeability claim): 5306-01-648-3012, 5306-01-648-3015, 5306-01-648-3019. Verify interchangeability with system specifications before substitution.
Key specifications for NAS428CK4A6: Head Height: 0.141 INCHES NOMINAL IN; Fastener Length: 1.953 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL IN; Nominal Thread Diameter: 0.2500 INCHES 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.