The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-210-2916, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 20 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-210-2916 |
| Primary Part Number | BACB30NF8-21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| 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 | 1.838 INCHES MINIMUM AND 1.868 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.516 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM 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 | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP E4340 OR STEEL COMP 8740 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 |
|---|---|
| BACB30NF8-21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NF8-21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NF8-21 | Howmet Global Fastening Systems Inc (USA) |
| BACB30NF8-21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NF8-21 | Federal Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| BACB30NF8-21 | 5/2 Secondary reference U.S. Government activity |
| BACB30NF8-21 | 5/2 Secondary reference U.S. Government activity |
| BACB30NF8-21 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| BACB30NF8-21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30NF8-21 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NF8-21 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30NF8-21 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-210-2916 is a Bolt,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-210-2916 has 5 manufacturer part numbers on file: BACB30NF8-21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NF8-21 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30NF8-21 (Howmet Global Fastening Systems Inc), BACB30NF8-21 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NF8-21 (Federal Manufacturing Corp).
Key specifications for BACB30NF8-21: 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. 20 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.