The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-434-7646, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-434-7646 |
| Primary Part Number | BACB30NE6-56Z |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 4.0964 INCHES MINIMUM AND 4.1264 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.578 INCHES NOMINAL 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 | 0.3750 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.4900 INCHES MINIMUM AND 3.5100 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.4203 INCHES MINIMUM AND 0.4213 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| BACB30NE6-56Z | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NE6-56Z | Howmet Global Fastening Systems Inc (USA) |
| BACB30NE6-56Z | Federal Manufacturing Corp (USA) |
| BACB30NE6-56Z | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30NE6-56Z | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30NE6-56Z | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NE6-56Z | Huck International, Inc (USA) |
| BACB30NE6-56Z | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30NE6-56Z | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NE6-56Z | 5/9 Secondary reference U.S. Government activity |
| BACB30NE6-56Z | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-434-7646 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 5306-01-434-7646 has 8 manufacturer part numbers on file: BACB30NE6-56Z (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NE6-56Z (Howmet Global Fastening Systems Inc), BACB30NE6-56Z (Federal Manufacturing Corp), BACB30NE6-56Z (Sps Technologies, Llc Dba PB Fasteners), BACB30NE6-56Z (Howmet Global Fastening Systems Inc Div City of Industry Operations) and 3 more.
Key specifications for BACB30NE6-56Z: Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 4.0964 INCHES MINIMUM AND 4.1264 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416, TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.578 INCHES NOMINAL IN. 16 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.