The Screw,close Tolerance, cataloged under National Stock Number 5305-01-337-6008, 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 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-337-6008 |
| Primary Part Number | BACB30MS3R7 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 0.768 INCHES MINIMUM AND 0.798 INCHES MAXIMUM IN |
| Thread Length | 0.345 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| 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 |
| 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 |
|---|---|
| BACB30MS3R7 | Hi-Shear Corporation (USA) |
| BACB30MS3R7 | Huck International, Inc (USA) |
| BACB30MS3R7 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30MS3R7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30MS3R7 | 5/9 Secondary reference U.S. Government activity |
| BACB30MS3R7 | 5/2 Secondary reference U.S. Government activity |
| BACB30MS3R7 | 5/2 Secondary reference U.S. Government activity |
| BACB30MS3R7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-337-6008 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-337-6008 has 4 manufacturer part numbers on file: BACB30MS3R7 (Hi-Shear Corporation), BACB30MS3R7 (Huck International, Inc), BACB30MS3R7 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30MS3R7 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BACB30MS3R7: Fastener Length: 0.768 INCHES MINIMUM AND 0.798 INCHES MAXIMUM IN; Thread Length: 0.345 INCHES NOMINAL IN; Nominal Thread Diameter: 0.190 INCHES IN; Features Provided: CETYL ALCOHOL LUBRICANT. 13 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.