The Screw,close Tolerance, cataloged under National Stock Number 5305-01-337-6024, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-337-6024 |
| Primary Part Number | BACB30MS3R6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BAC 5861,CAGE81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.345 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| 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 | 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 |
|---|---|
| BACB30MS3R6 | Huck International, Inc (USA) |
| BACB30MS3R6 | Hi-Shear Corporation (USA) |
| BACB30MS3R6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30MS3R6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30MS3R6 | 5/2 Secondary reference U.S. Government activity |
| BACB30MS3R6 | 5/9 Secondary reference U.S. Government activity |
| BACB30MS3R6 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30MS3R6 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-337-6024 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-337-6024 has 4 manufacturer part numbers on file: BACB30MS3R6 (Huck International, Inc), BACB30MS3R6 (Hi-Shear Corporation), BACB30MS3R6 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30MS3R6 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BACB30MS3R6: Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BAC 5861,CAGE81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.345 INCHES NOMINAL IN. 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.