The Bolt,u, cataloged under National Stock Number 5306-00-400-3978, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-400-3978 |
| Item Name | Bolt,u |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Inside Distance Between Shanks | 2.630 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 520002 FSCM 33525 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.750 INCHES MINIMUM IN |
| Distance From Inside Center of Bend to Bolt End | 2.500 INCHES NOMINAL IN |
| Style Designator | ROUND BEND |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 251627 | 3/9 Design control — primary reference Davey Compressor Co Div of Keco Industries Inc |
| 251627 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| 251627 | 5/9 Secondary reference Kidde-Fenwal, Llc |
NSN 5306-00-400-3978 is a Bolt,u, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-400-3978: Inside Distance Between Shanks: 2.630 INCHES NOMINAL IN; Surface Treatment Document and Classification: 520002 FSCM 33525 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.750 INCHES MINIMUM IN; Distance From Inside Center of Bend to Bolt End: 2.500 INCHES NOMINAL IN. 13 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.