The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-333-4523, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-333-4523 |
| Primary Part Number | VS2978A08U034 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.281 INCHES NOMINAL IN |
| Fastener Length | 2.641 INCHES NOMINAL IN |
| Thread Length | 0.516 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.125 INCHES NOMINAL IN |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4985 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE AND NICKEL AND CADMIUM OVERALL |
| Minimum Tensile Strength | 132000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| VS2978A08U034 | Howmet Global Fastening Systems Inc (USA) |
| VAL23611-8D034 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11797A08U034 | Reid Products Inc. Dba Reid Products Inc (USA) |
| PBF1041A8U034 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC2263A03U034 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 68484-8A34 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BM3200-8A034 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| STSBG000A08U034 | 5/2 Secondary reference U.S. Government activity |
| STSBG000A08U034 | 3/2 Design control — primary reference U.S. Government activity |
| VS2978A08U034 | 5/9 Secondary reference U.S. Government activity |
| BM3200-8A034 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-333-4523 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-333-4523 has 7 manufacturer part numbers on file: VS2978A08U034 (Howmet Global Fastening Systems Inc), VAL23611-8D034 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 11797A08U034 (Reid Products Inc. Dba Reid Products Inc), PBF1041A8U034 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), AIC2263A03U034 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
Key specifications for VS2978A08U034: Head Height: 0.281 INCHES NOMINAL IN; Fastener Length: 2.641 INCHES NOMINAL IN; Thread Length: 0.516 INCHES NOMINAL IN; Nominal Thread Diameter: 0.500 INCHES IN. 16 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.