The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-338-4018, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Boeing Defence Australia Ltd Div Defense, Space & Security. Government technical data includes 19 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-338-4018 |
| Primary Part Number | BACB30NR4K10 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Boeing Defence Australia Ltd Div Defense, Space & Security |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.999 INCHES MINIMUM AND 1.029 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85 TY1 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.389 INCHES NOMINAL IN |
| Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 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 |
|---|---|
| BACB30NR4K10 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACB30NR4K10 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NR4K10 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NR4K10 | Boeing Defence Australia Ltd (AUS) |
| BACB30NR4K10 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NR4K10 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NR4K10 | Hi-Shear Corporation (USA) |
| BACB30NR4K10 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30NR4K10 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| BACB30NR4K10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NR4K10 | 5/2 Secondary reference U.S. Government activity |
| BACB30NR4K10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NR4K10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NR4K10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-338-4018 is a Bolt,close Tolerance, manufactured by Boeing Defence Australia Ltd Div Defense, Space & Security, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-338-4018 has 8 manufacturer part numbers on file: BACB30NR4K10 (Boeing Defence Australia Ltd Div Defense, Space & Security), BACB30NR4K10 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30NR4K10 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NR4K10 (Boeing Defence Australia Ltd), BACB30NR4K10 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 3 more.
Key specifications for BACB30NR4K10: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN. 19 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.