The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-409-3290, 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 22 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-409-3290 |
| Primary Part Number | BACB30LJ6DU20 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | J M Precision Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 1.705 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.445 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.534 INCHES MINIMUM AND 1.584 INCHES MAXIMUM 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 |
| Part Number | Manufacturer |
|---|---|
| BACB30LJ6DU20 | J M Precision Inc (USA) |
| BACB30LJ6DU20 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LJ6DU20 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LJ6DU20 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LJ6DU20 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LJ6DU20 | Federal Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| BACB30LJ6DU20 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30LJ6DU20 | 5/2 Secondary reference U.S. Government activity |
| BACB30LJ6DU20 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LJ6DU20 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-409-3290 is a Bolt,close Tolerance, manufactured by J M Precision Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-409-3290 has 6 manufacturer part numbers on file: BACB30LJ6DU20 (J M Precision Inc), BACB30LJ6DU20 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LJ6DU20 (Howmet Global Fastening Systems Inc), BACB30LJ6DU20 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LJ6DU20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 1 more.
Key specifications for BACB30LJ6DU20: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN. 22 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.