The Screw,close Tolerance, cataloged under National Stock Number 5305-01-338-7311, 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 19 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-338-7311 |
| Primary Part Number | BACB30NT3R17 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Fastener Length | 1.392 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BAC 5861,CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| 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 | PAN |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Color | RED THREADS |
| Surface Treatment | PHOSPHATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.357 INCHES MINIMUM AND 0.373 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 |
|---|---|
| BACB30NT3R17 | Huck International, Inc (USA) |
| BACB30NT3R17 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NT3R17 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NT3R17 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NT3R17 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NT3R17 | Hi-Shear Corporation (USA) |
| BACB30NT3R17 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30NT3R17 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NT3R17 | 5/2 Secondary reference U.S. Government activity |
| BACB30NT3R17 | 5/2 Secondary reference U.S. Government activity |
| BACB30NT3R17 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT3R17 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-338-7311 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-338-7311 has 7 manufacturer part numbers on file: BACB30NT3R17 (Huck International, Inc), BACB30NT3R17 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NT3R17 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NT3R17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30NT3R17 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 2 more.
Key specifications for BACB30NT3R17: Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Fastener Length: 1.392 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BAC 5861,CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 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.