The Setscrew, cataloged under National Stock Number 5305-01-251-1645, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-251-1645 |
| Primary Part Number | 8333-001 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Thread Class | 3A A |
| Width Across Flats | 0.125 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-13924 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Head Style | HEADLESS (SETSCREW) |
| Material | STEEL COMP 4032 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Fastener Length | 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Point Style | FULL DOG |
| Surface Treatment | OXIDE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Quantity Per Inch | 20 |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| Thread Direction | RIGHT-HAND |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5305-01-251-1645 is a Setscrew, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-01-251-1645 has 2 cross-referenced part numbers: 8333-001 (Sps Technologies, Llc Dba PB Fasteners), 5906206-1 (Naval Sea Systems Command).
There are 2 known substitutes for 5305-01-251-1645: 3040-00-692-6298, 3110-00-740-1111. Verify interchangeability with system specifications before substitution.
Key specifications for 8333-001: Thread Class: 3A A; Width Across Flats: 0.125 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-13924 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Head Style: HEADLESS (SETSCREW). 16 total characteristics are documented in the Federal Logistics Information System.