The Screw,close Tolerance, cataloged under National Stock Number 5305-01-337-3798, 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 20 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-337-3798 |
| Primary Part Number | BACB30WP5-16 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 1.454 INCHES MINIMUM AND 1.484 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE 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 | 24 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.574 INCHES MINIMUM AND 0.637 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 |
|---|---|
| BACB30WP5-16 | Hi-Shear Corporation (USA) |
| BACB30WP5-16 | Howmet Global Fastening Systems Inc (USA) |
| BACB30WP5-16 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30WP5-16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30WP5-16 | Indiana Wheel and Rim Co Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30WP5-16 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30WP5-16 | 5/2 Secondary reference U.S. Government activity |
| BACB30WP5-16 | 5/9 Secondary reference U.S. Government activity |
| BACB30WP5-16 | 5/2 Secondary reference U.S. Government activity |
| BACB30WP5-16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-337-3798 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-337-3798 has 5 manufacturer part numbers on file: BACB30WP5-16 (Hi-Shear Corporation), BACB30WP5-16 (Howmet Global Fastening Systems Inc), BACB30WP5-16 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30WP5-16 (Sps Technologies, Llc Dba PB Fasteners), BACB30WP5-16 (Indiana Wheel and Rim Co Inc).
Key specifications for BACB30WP5-16: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 1.454 INCHES MINIMUM AND 1.484 INCHES MAXIMUM IN. 20 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.