The Screw,close Tolerance, cataloged under National Stock Number 5305-01-580-9577, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-580-9577 |
| Primary Part Number | BACB30NN3K9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 0.892 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN |
| Thread Length | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.1881 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 | 0.345 INCHES MINIMUM AND 0.383 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 |
|---|---|
| BACB30NN3K9 PRIMARY | Hi-Shear Corporation (USA) |
| BACB30NN3K9 | Blanc Aero Industrie Villefranche De Rouergue - Groupe Lisi Aerospace (FRA) |
| BACB30NN3K9 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NN3K9 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30NN3K9 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NN3K9 PRIMARY | Huck International, Inc (USA) |
| BACB30NN3K9 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30NN3K9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-580-9577 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-580-9577 has 7 manufacturer part numbers on file: BACB30NN3K9 (Hi-Shear Corporation), BACB30NN3K9 (Blanc Aero Industrie Villefranche De Rouergue - Groupe Lisi Aerospace), BACB30NN3K9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NN3K9 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30NN3K9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-6601. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30NN3K9: Fastener Length: 0.892 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN; Thread Length: 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.190 INCHES IN; Head Style: FLAT COUNTERSUNK. 15 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.