The Screw,close Tolerance, cataloged under National Stock Number 5305-01-646-5228, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc Div City of Industry Operations. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-646-5228 |
| Primary Part Number | BACB30LK3K6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc Div City of Industry Operations |
| Status | ACTIVE |
| 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 |
|---|---|
| BACB30LK3K6 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LK3K6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LK3K6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LK3K6 | Federal Manufacturing Corp (USA) |
| BACB30LK3K6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LK3K6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LK3K6 | Kelly Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30LK3K6 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LK3K6 | 5/9 Secondary reference Allen R C Instruments Inc |
NSN 5305-01-646-5228 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc Div City of Industry Operations, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-646-5228 has 7 manufacturer part numbers on file: BACB30LK3K6 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30LK3K6 (Sps Technologies, Llc Dba PB Fasteners), BACB30LK3K6 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LK3K6 (Federal Manufacturing Corp), BACB30LK3K6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-6765. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30LK3K6: Part Name Assigned by Controlling Agency: BOLT, PAN HEAD, CROSS RECESS, SHORT THREAD, CLOSE TOL, A286 CRES; End Item Identification: P-8A POSEIDON AIRCRAFT A. 0 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.