The Setscrew, cataloged under National Stock Number 5305-00-958-7974, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-958-7974 |
| Primary Part Number | 81981 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Hydro-Aire Aerospace Corp |
| Status | ACTIVE |
| Thread Length | 0.210 INCHES MINIMUM IN |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Surface Treatment | PASSIVATE OVERALL |
| Hardness Rating | 80.0 ROCKWELL C MINIMUM OVERALL |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Height | 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 30000 POUNDS PER SQUARE INCH LBS |
| Head Diameter | 0.176 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN |
| Head Style | FLAT CHAMFER |
| Width Across Flats | 0.094 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Fastener Length | 0.210 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 40 |
| Point Style | CONE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 81981 PRIMARY | Hydro-Aire Aerospace Corp (USA) |
NSN 5305-00-958-7974 is a Setscrew, manufactured by Hydro-Aire Aerospace Corp, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-958-7974 has 1 cross-referenced part number: 81981 (Hydro-Aire Aerospace Corp).
There is 1 known substitute for 5305-00-958-7974: 3020-01-093-5017. Verify interchangeability with system specifications before substitution.
Key specifications for 81981: Thread Length: 0.210 INCHES MINIMUM IN; Thread Direction: RIGHT-HAND; Internal Drive Style: HEXAGON; Surface Treatment: PASSIVATE OVERALL. 18 total characteristics are documented in the Federal Logistics Information System.