The Screw,close Tolerance, cataloged under National Stock Number 5305-01-197-6512, 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 18 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-197-6512 |
| Primary Part Number | BACB30NT4-10 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Fastener Length | 1.124 INCHES MINIMUM AND 1.154 INCHES MAXIMUM IN |
| Thread Length | 0.359 INCHES MINIMUM AND 0.419 INCHES MAXIMUM IN |
| Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| 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 | 0.473 INCHES MINIMUM AND 0.492 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 |
|---|---|
| BACB30NT4-10 PRIMARY | Huck International, Inc (USA) |
| BACB30NT4-10 PRIMARY | Hi-Shear Corporation (USA) |
| BACB30NT4-10 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NT4-10 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NT4-10 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NT4-10 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACB30NT4-10 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACB30NT4-10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-10 | 5/9 Secondary reference Aero-Flow Dynamics Inc |
| BACB30NT4-10 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| BACB30NT4-10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-10 | 5/9 Secondary reference Voi-Shan/chatsworth Div of Vsi Corp Sub of Fairchild Industries Inc |
| BACB30NT4-10 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-10 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| BACB30NT4-10 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-197-6512 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-197-6512 has 6 manufacturer part numbers on file: BACB30NT4-10 (Huck International, Inc), BACB30NT4-10 (Hi-Shear Corporation), BACB30NT4-10 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NT4-10 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NT4-10 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 1 more.
Key specifications for BACB30NT4-10: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN. 18 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.