The Setscrew, cataloged under National Stock Number 5305-01-174-8221, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-174-8221 |
| Primary Part Number | 39052 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Point Diameter | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Width Across Flats | 0.438 INCHES NOMINAL IN |
| Point Length | 0.500 INCHES NOMINAL IN |
| Fastener Length | 3.438 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | BALL |
| Internal Drive Style | SQUARE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL COMP 416 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 39052 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 21720N PIECE 2 | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 12914N PIECE 2 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 5305-01-174-8221 is a Setscrew, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-174-8221 has 2 manufacturer part numbers on file: 39052 (Leslie Controls, Inc. Dba Leslie Controls Inc), 21720N PIECE 2 (Leslie Controls, Inc. Dba Leslie Controls Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-481-0651. Verify interchangeability with system specifications before substitution.
Key specifications for 39052: Point Diameter: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Width Across Flats: 0.438 INCHES NOMINAL IN; Point Length: 0.500 INCHES NOMINAL IN; Fastener Length: 3.438 INCHES NOMINAL IN. 14 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.