The Setscrew, cataloged under National Stock Number 5305-01-643-9327, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Nylok Llc. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-643-9327 |
| Primary Part Number | 90251A179 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Nylok Llc |
| Status | ACTIVE |
| Point Diameter | 0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN |
| Width Across Flats | 0.094 INCHES NOMINAL IN |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Point Chamfer Angle | 113.0 DEGREES MINIMUM AND 123.0 DEGREES MAXIMUM |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CUP |
| Locking Feature | PATCH THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 316 OVERALL |
| Material | PLASTIC NYLON LOCKING FEATURE |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-01-643-9327 is a Setscrew, manufactured by Nylok Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-643-9327 has 2 manufacturer part numbers on file: 90251A179 (Mcmaster-Carr Supply Company), 90251A179 (Nylok Llc).
Key specifications for 90251A179: Point Diameter: 0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN; Width Across Flats: 0.094 INCHES NOMINAL IN; Fastener Length: 0.250 INCHES NOMINAL IN; Point Chamfer Angle: 113.0 DEGREES MINIMUM AND 123.0 DEGREES MAXIMUM. 15 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.