The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-581-4357, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-581-4357 |
| Primary Part Number | BACB30UU6K27D |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 2.143 INCHES MINIMUM AND 2.173 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85, TYPE 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.470 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4662 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5962 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.374 INCHES NOMINAL IN |
| Surface Treatment | ALUMINUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY 718 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 |
|---|---|
| BACB30UU6K27D | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BACB30UU6K27D | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30UU6K27D | Federal Manufacturing Corp (USA) |
| BACB30UU6K27D | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| BACB30UU6K27D | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30UU6K27D | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30UU6K27D | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30UU6K27D | Franklin Enterprises Ltd (CAN) |
| BACB30UU6K27D | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30UU6K27D | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-581-4357 is a Bolt,close Tolerance, manufactured by Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-581-4357 has 9 manufacturer part numbers on file: BACB30UU6K27D (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), BACB30UU6K27D (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30UU6K27D (Federal Manufacturing Corp), BACB30UU6K27D (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), BACB30UU6K27D (Sps Technologies, Llc Dba PB Fasteners) and 4 more.
Key specifications for BACB30UU6K27D: Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 2.143 INCHES MINIMUM AND 2.173 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BMS 10-85, TYPE 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 17 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.