The Screw,close Tolerance, cataloged under National Stock Number 5305-01-338-4057, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Boeing Defence Australia Ltd. Government technical data includes 21 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-338-4057 |
| Primary Part Number | BACB30NN3K22 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Boeing Defence Australia Ltd |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 1.705 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN |
| Thread Length | 0.345 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Color | BLACK THREADS |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.345 INCHES MINIMUM AND 0.383 INCHES MAXIMUM 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 |
|---|---|
| BACB30NN3K22 | Boeing Defence Australia Ltd (AUS) |
| BACB30NN3K22 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NN3K22 | Howmet Global Fastening Systems Inc (USA) |
| BACB30NN3K22 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACB30NN3K22 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NN3K22 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NN3K22 | Hi-Shear Corporation (USA) |
| BACB30NN3K22 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30NN3K22 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| BACB30NN3K22 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NN3K22 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30NN3K22 | 5/2 Secondary reference U.S. Government activity |
| BACB30NN3K22 | 5/2 Secondary reference U.S. Government activity |
| BACB30NN3K22 | 5/9 Secondary reference U.S. Government activity |
| BACB30NN3K22 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-338-4057 is a Screw,close Tolerance, manufactured by Boeing Defence Australia Ltd, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-338-4057 has 9 manufacturer part numbers on file: BACB30NN3K22 (Boeing Defence Australia Ltd), BACB30NN3K22 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NN3K22 (Howmet Global Fastening Systems Inc), BACB30NN3K22 (Boeing Defence Australia Ltd Div Defense, Space & Security), BACB30NN3K22 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 4 more.
Key specifications for BACB30NN3K22: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 1.705 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN. 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.