The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-209-9376, 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 17 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-209-9376 |
| Primary Part Number | BACB30LT4U3 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Federal Manufacturing Corp |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 0.562 INCHES MINIMUM AND 0.592 INCHES MAXIMUM IN |
| Thread Length | 0.364 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.179 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 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 |
|---|---|
| BACB30LT4U3 | Federal Manufacturing Corp (USA) |
| BACB30LT4U3 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LT4U3 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LT4U3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LT4U3 | Huck International, Inc (USA) |
| BACB30LT4U3 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LT4U3 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LT4U3 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30LT4U3 | 5/2 Secondary reference U.S. Government activity |
| BACB30LT4U3 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LT4U3 | 5/2 Secondary reference U.S. Government activity |
| BACB30LT4U3 | 5/2 Secondary reference U.S. Government activity |
| BACB30LT4U3 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-209-9376 is a Bolt,close Tolerance, manufactured by Federal Manufacturing Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-209-9376 has 8 manufacturer part numbers on file: BACB30LT4U3 (Federal Manufacturing Corp), BACB30LT4U3 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30LT4U3 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LT4U3 (Sps Technologies, Llc Dba PB Fasteners), BACB30LT4U3 (Huck International, Inc) and 3 more.
Key specifications for BACB30LT4U3: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 0.562 INCHES MINIMUM AND 0.592 INCHES MAXIMUM IN. 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.