The Setscrew, cataloged under National Stock Number 5305-00-721-4644, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Amphenol Corporation Div Amphenol Rf. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-721-4644 |
| Primary Part Number | PM21220-1 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Amphenol Corporation Div Amphenol Rf |
| Status | CANCELLED |
| Head Style | HEADLESS (SETSCREW) |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Length | 0.250 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-18732 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Surface Treatment | PASSIVATE OVERALL |
| Width Across Flats | 0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 OR STEEL COMP 431 OVERALL |
| Point Style | CONE |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| PM21220-1 | Amphenol Corporation Div Amphenol Rf (USA) |
| NASM565-BC8H4 | National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA) |
| 21220-1 | Microwave Devices Inc (USA) |
| AN565BC8H4 | Aeronautical Standards Group Dept of Navy and Air Force (USA) |
NSN 5305-00-721-4644 is a Setscrew, manufactured by Amphenol Corporation Div Amphenol Rf, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-721-4644 has 4 cross-referenced part numbers: PM21220-1 (Amphenol Corporation Div Amphenol Rf), NASM565-BC8H4 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), 21220-1 (Microwave Devices Inc), AN565BC8H4 (Aeronautical Standards Group Dept of Navy and Air Force).
There are 4 known substitutes for 5305-00-721-4644: 3020-01-104-8088, 5305-01-256-5182, 5910-01-384-1725 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for PM21220-1: Head Style: HEADLESS (SETSCREW); Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC). 15 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-721-4644 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.