The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-508-6599, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-508-6599 |
| Primary Part Number | PBF104A6U58 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.210 INCHES NOMINAL IN |
| Fastener Length | 4.009 INCHES MINIMUM AND 4.056 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.374 INCHES MINIMUM AND 0.441 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.615 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL AND CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| PBF104A6U58 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BM3200-6A58 | Huck International, Inc (USA) |
| VAL23611-6D58 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11797A06U58 | Reid Products Inc. Dba Reid Products Inc (USA) |
| AIC2263A06U058 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| VS2978A06U58 | 5/2 Secondary reference U.S. Government activity |
| 68484-6A58 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| STSBG000A06U58 | 5/2 Secondary reference U.S. Government activity |
| BM3200-4A58 | 5/9 Secondary reference U.S. Government activity |
| AIC2263A06U58 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| BM3200-6A58 | 5/9 Secondary reference U.S. Government activity |
| 68484-6A58 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-508-6599 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-508-6599 has 5 manufacturer part numbers on file: PBF104A6U58 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BM3200-6A58 (Huck International, Inc), VAL23611-6D58 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 11797A06U58 (Reid Products Inc. Dba Reid Products Inc), AIC2263A06U058 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for PBF104A6U58: Head Height: 0.210 INCHES NOMINAL IN; Fastener Length: 4.009 INCHES MINIMUM AND 4.056 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.374 INCHES MINIMUM AND 0.441 INCHES MAXIMUM 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.