The Bolt,shoulder, cataloged under National Stock Number 5306-01-231-5896, 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 21 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-231-5896 |
| Primary Part Number | BACB30MT8T-21Y |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Federal Manufacturing Corp |
| Status | ACTIVE |
| Extended Washer Thickness | 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Head Height | 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN |
| Fastener Length | 2.110 INCHES MINIMUM AND 2.140 INCHES MAXIMUM IN |
| Shoulder Length | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | BPS-F-69,CLASS 220FA6 MFR REF ALL TREATMENT RESPONSES OVERALL |
| Extended Washer Diameter | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.5297 INCHES MINIMUM AND 0.5307 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.788 INCHES MINIMUM AND 0.838 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL AND CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| BACB30MT8T-21Y | Federal Manufacturing Corp (USA) |
| BACB30MT8T-21Y | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30MT8T-21Y | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30MT8T-21Y | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| BACB30MT8T-21Y | 5/2 Secondary reference U.S. Government activity |
| BACB30MT8T-21Y | 5/2 Secondary reference U.S. Government activity |
| BACB30MT8T-21Y | 3/2 Design control — primary reference U.S. Government activity |
| BACB30MT8T-21Y | 5/9 Secondary reference U.S. Government activity |
| BACB30MT8T-21Y | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30MT8T-21Y | 5/9 Secondary reference Deutsch Fastener Corp |
| BACB30MT8T-21Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-231-5896 is a Bolt,shoulder, manufactured by Federal Manufacturing Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-231-5896 has 4 manufacturer part numbers on file: BACB30MT8T-21Y (Federal Manufacturing Corp), BACB30MT8T-21Y (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30MT8T-21Y (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30MT8T-21Y (Valley-Todeco, Inc. Dba Arconic Fastening Systems).
Key specifications for BACB30MT8T-21Y: Extended Washer Thickness: 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Head Height: 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN; Fastener Length: 2.110 INCHES MINIMUM AND 2.140 INCHES MAXIMUM IN; Shoulder Length: 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM FIRST SHOULDER IN. 21 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.