The Screw,close Tolerance, cataloged under National Stock Number 5305-01-198-8235, 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 19 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-198-8235 |
| Primary Part Number | BACB30VF3K4 |
| 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 |
| Fastener Length | 0.563 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85,TY 1,FSCM 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.308 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4928,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| 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 | 32 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.271 INCHES MINIMUM AND 0.303 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 |
|---|---|
| BACB30VF3K4 | Hi-Shear Corporation (USA) |
| BACB30VF3K4 | Huck International, Inc (USA) |
| BACB30VF3K4 | Boeing Defence Australia Ltd (AUS) |
| BACB30VF3K4 | Howmet Global Fastening Systems Inc (USA) |
| BACB30VF3K4 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30VF3K4 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACB30VF3K4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30VF3K4 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACB30VF3K4 | 5/9 Secondary reference U.S. Government activity |
| BACB30VF3K4 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30VF3K4 | 5/2 Secondary reference U.S. Government activity |
| BACB30VF3K4 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-198-8235 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-198-8235 has 8 manufacturer part numbers on file: BACB30VF3K4 (Hi-Shear Corporation), BACB30VF3K4 (Huck International, Inc), BACB30VF3K4 (Boeing Defence Australia Ltd), BACB30VF3K4 (Howmet Global Fastening Systems Inc), BACB30VF3K4 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 3 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-6796. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30VF3K4: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.563 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BMS 10-85,TY 1,FSCM 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.