The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-203-0905, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Federal Manufacturing Corp. Government technical data includes 22 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-203-0905 |
| Primary Part Number | BACB30LJ8DU21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Federal Manufacturing Corp |
| 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 | 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Fastener Length | 1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.516 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.199 INCHES MINIMUM AND 1.219 INCHES MAXIMUM IN |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4981 INCHES MINIMUM AND 0.4987 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 95000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.539 INCHES MINIMUM AND 1.589 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 |
|---|---|
| BACB30LJ8DU21 | Federal Manufacturing Corp (USA) |
| BACB30LJ8DU21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LJ8DU21 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LJ8DU21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LJ8DU21 | Huck International, Inc (USA) |
| BACB30LJ8DU21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LJ8DU21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30LJ8DU21 | 5/9 Secondary reference U.S. Government activity |
| BACB30LJ8DU21 | C/1 Advisory reference — outside the item-of-supply concept Grimes Aerospace Company |
| BACB30LJ8DU21 | 5/2 Secondary reference U.S. Government activity |
| BACB30LJ8DU21 | 5/2 Secondary reference U.S. Government activity |
| BACB30LJ8DU21 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LJ8DU21 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-203-0905 is a Bolt,close Tolerance, manufactured by Federal Manufacturing Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-203-0905 has 7 manufacturer part numbers on file: BACB30LJ8DU21 (Federal Manufacturing Corp), BACB30LJ8DU21 (Sps Technologies, Llc Dba PB Fasteners), BACB30LJ8DU21 (Howmet Global Fastening Systems Inc), BACB30LJ8DU21 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LJ8DU21 (Huck International, Inc) and 2 more.
Key specifications for BACB30LJ8DU21: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.250 INCHES MINIMUM AND 0.265 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.