The Bolt,machine, cataloged under National Stock Number 5306-00-378-9920, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5306-00-378-9920 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.375 INCHES NOMINAL IN |
| Fastener Length | 4.000 INCHES NOMINAL IN |
| Thread Length | 1.375 INCHES MINIMUM IN |
| Shank Unthreaded Hole Diameter | 0.375 INCHES MINIMUM AND 0.500 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 1.375 INCHES IN |
| Features Provided | UNFINISHED HEAD |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.500 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 8 |
| Material | STEEL OVERALL |
| Thread Series Designator | UN |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.500 INCHES NOMINAL FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 128N3-4 | 5/2 Secondary reference U.S. Government activity |
| 128N3-4 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
| 128N | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-378-9920 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5950-00-442-0892, 5331-01-424-3489. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-00-378-9920: Head Height: 0.375 INCHES NOMINAL IN; Fastener Length: 4.000 INCHES NOMINAL IN; Thread Length: 1.375 INCHES MINIMUM IN; Shank Unthreaded Hole Diameter: 0.375 INCHES MINIMUM AND 0.500 INCHES MAXIMUM FIRST HOLE IN. 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.