The Screw,close Tolerance, cataloged under National Stock Number 5305-01-583-5275, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-583-5275 |
| Primary Part Number | BACB30LU5D19 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Fastener Length | 0.969 INCHES NOMINAL IN |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.500 INCHES NOMINAL IN |
| Grip Diameter | 0.326 INCHES NOMINAL IN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.637 INCHES NOMINAL 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 |
|---|---|
| BACB30LU5D19 | Huck International, Inc (USA) |
| BACB30LU5D19 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LU5D19 | Federal Manufacturing Corp (USA) |
| BACB30LU5D19 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LU5D19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LU5D19 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LU5D19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30LU5D19 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-583-5275 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-583-5275 has 7 manufacturer part numbers on file: BACB30LU5D19 (Huck International, Inc), BACB30LU5D19 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30LU5D19 (Federal Manufacturing Corp), BACB30LU5D19 (Howmet Global Fastening Systems Inc), BACB30LU5D19 (Sps Technologies, Llc Dba PB Fasteners) and 2 more.
Key specifications for BACB30LU5D19: Fastener Length: 0.969 INCHES NOMINAL IN; Thread Length: 0.500 INCHES NOMINAL IN; Nominal Thread Diameter: 0.312 INCHES IN; Head Style: FLAT COUNTERSUNK. 14 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.