The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-043-1877, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is J M Precision Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-043-1877 |
| Primary Part Number | STSBG003A57059 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | J M Precision Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Head Height | 0.309 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN |
| Fastener Length | 4.292 INCHES MINIMUM AND 4.322 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Thread Length | 0.595 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.677 INCHES MINIMUM AND 3.697 INCHES MAXIMUM IN |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| STSBG003A57059 | J M Precision Inc (USA) |
| STSBG003A5U059 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| STSBG003A5U059 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| STSBG003A5U059 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| STSBG003A5U059 | Huck International, Inc (USA) |
| STSBG003A5U059 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| STSBG003A5U059 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11699A05U059 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| STSBG003A5U059 | 3/2 Design control — primary reference U.S. Government activity |
| STSBG003A5U059 | 5/2 Secondary reference U.S. Government activity |
| LS5995-5-59 | 5/9 Secondary reference U.S. Government activity |
| STSBG003A5U059 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-043-1877 is a Bolt,close Tolerance, manufactured by J M Precision Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-043-1877 has 8 manufacturer part numbers on file: STSBG003A57059 (J M Precision Inc), STSBG003A5U059 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), STSBG003A5U059 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), STSBG003A5U059 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), STSBG003A5U059 (Huck International, Inc) and 3 more.
Key specifications for STSBG003A57059: Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Head Height: 0.309 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN. 18 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.