The Screw,close Tolerance, cataloged under National Stock Number 5305-01-197-6513, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-197-6513 |
| Primary Part Number | BACB30NT4-9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| 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 | 0.936 INCHES MINIMUM AND 0.966 INCHES MAXIMUM IN |
| Thread Length | 0.364 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN |
| Material Document and Classification | AMS4928,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY 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 |
|---|---|
| BACB30NT4-9 PRIMARY | Hi-Shear Corporation (USA) |
| BACB30NT4-9 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NT4-9 PRIMARY | Huck International, Inc (USA) |
| BACB30NT4-9 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NT4-9 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30NT4-9 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-9 | 5/9 Secondary reference Ge Kaye Instruments Inc |
| BACB30NT4-9 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-9 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| BACB30NT4-9 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACB30NT4-9 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| BACB30NT4-9 | 5/9 Secondary reference U.S. Government activity |
| BACB30NT4-9 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-197-6513 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-197-6513 has 5 manufacturer part numbers on file: BACB30NT4-9 (Hi-Shear Corporation), BACB30NT4-9 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30NT4-9 (Huck International, Inc), BACB30NT4-9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NT4-9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for BACB30NT4-9: 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.