The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-033-2663, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-033-2663 |
| Primary Part Number | BACB30NE6H6 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 0.938 INCHES MINIMUM AND 0.968 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.553 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN |
| Hole Configuration Style | HEXAGON CORNERS |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81205-BACB30NE MANUFACTURERS STANDARD |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.075 INCHES NOMINAL 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 |
|---|---|
| BACB30NE6H6 | Huck International, Inc (USA) |
| BACB30NE6H6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30NE6H6 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30NE6H6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NE6H6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NE6H6 | Howmet Global Fastening Systems Inc (USA) |
| BACB30NE6H6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NE6H6 | Federal Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| BACB30NE6H6 | 5/9 Secondary reference U.S. Government activity |
| BACB30NE6H6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-033-2663 is a Bolt,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-033-2663 has 8 manufacturer part numbers on file: BACB30NE6H6 (Huck International, Inc), BACB30NE6H6 (Sps Technologies, Llc Dba PB Fasteners), BACB30NE6H6 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30NE6H6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NE6H6 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 3 more.
Key specifications for BACB30NE6H6: Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 0.938 INCHES MINIMUM AND 0.968 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.