The Screw,shoulder, cataloged under National Stock Number 5305-01-149-1940, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-149-1940 |
| Primary Part Number | BACB30MA6-5 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Width Across Flats | 0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN |
| Head Height | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Fastener Length | 0.513 INCHES MINIMUM AND 0.533 INCHES MAXIMUM IN |
| Shoulder Length | 0.158 INCHES MINIMUM AND 0.168 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.233 INCHES MINIMUM AND 0.234 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP E4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.320 INCHES MINIMUM AND 0.340 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 |
|---|---|
| BACB30MA6-5 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HL202-6-5 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HL202-6-5 | Huck International, Inc (USA) |
| HL202-6-5 | Hi-Shear Corporation (USA) |
| BACB30MA6-5 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HL202-6-5 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HL202-6-5 | 5/9 Secondary reference U.S. Government activity |
| L-8052-6-5 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| HL202-6-5 | 5/2 Secondary reference U.S. Government activity |
| BACB30MA6-5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-149-1940 is a Screw,shoulder, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-149-1940 has 5 manufacturer part numbers on file: BACB30MA6-5 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HL202-6-5 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HL202-6-5 (Huck International, Inc), HL202-6-5 (Hi-Shear Corporation), BACB30MA6-5 (West Coast Aerospace, Inc.).
Key specifications for BACB30MA6-5: Width Across Flats: 0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN; Head Height: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Fastener Length: 0.513 INCHES MINIMUM AND 0.533 INCHES MAXIMUM IN; Shoulder Length: 0.158 INCHES MINIMUM AND 0.168 INCHES MAXIMUM FIRST SHOULDER 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.