The Screw,close Tolerance, cataloged under National Stock Number 5305-01-339-0908, 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 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-339-0908 |
| Primary Part Number | BACB30VF3K2 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85 TY1 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.323 INCHES NOMINAL IN |
| Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.1625 INCHES MINIMUM AND 0.1635 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 UNS R56400 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| BACB30VF3K2 | Hi-Shear Corporation (USA) |
| BACB30VF3K2 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30VF3K2 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30VF3K2 | Boeing Defence Australia Ltd (AUS) |
| BACB30VF3K2 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACB30VF3K2 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30VF3K2 | 5/9 Secondary reference U.S. Government activity |
| BACB30VF3K2 | 5/2 Secondary reference U.S. Government activity |
| BACB30VF3K2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-339-0908 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-339-0908 has 6 manufacturer part numbers on file: BACB30VF3K2 (Hi-Shear Corporation), BACB30VF3K2 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30VF3K2 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30VF3K2 (Boeing Defence Australia Ltd), BACB30VF3K2 (Boeing Defence Australia Ltd Div Defense, Space & Security) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-6794. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30VF3K2: Fastener Length: 0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BMS 10-85 TY1 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.323 INCHES NOMINAL IN; Material Document and Classification: AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 17 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.