The Screw,close Tolerance, cataloged under National Stock Number 5305-01-365-0409, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-365-0409 |
| Primary Part Number | BACB30LR6-43 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 3.250 INCHES MINIMUM AND 3.280 INCHES MAXIMUM IN |
| Thread Length | 0.578 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.678 INCHES MINIMUM AND 2.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| 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 | 24 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.691 INCHES MINIMUM AND 0.765 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 |
|---|---|
| BACB30LR6-43 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LR6-43 | Federal Manufacturing Corp (USA) |
| BACB30LR6-43 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LR6-43 | Deutsch Co the (USA) |
| BACB30LR6-43 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LR6-43 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30LR6-43 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LR6-43 | 5/2 Secondary reference U.S. Government activity |
| BACB30LR6-43 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-365-0409 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-365-0409 has 6 manufacturer part numbers on file: BACB30LR6-43 (Howmet Global Fastening Systems Inc), BACB30LR6-43 (Federal Manufacturing Corp), BACB30LR6-43 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30LR6-43 (Deutsch Co the), BACB30LR6-43 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 1 more.
Key specifications for BACB30LR6-43: Fastener Length: 3.250 INCHES MINIMUM AND 3.280 INCHES MAXIMUM IN; Thread Length: 0.578 INCHES NOMINAL IN; Nominal Thread Diameter: 0.375 INCHES IN; Head Style: FLAT COUNTERSUNK. 13 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.