The Screw,machine, cataloged under National Stock Number 5305-01-331-0030, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-331-0030 |
| Primary Part Number | H21-0001-004 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications |
| Status | ACTIVE |
| Head Style | PAN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2A A |
| Head Diameter | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Screw Material | STEEL CORROSION RESISTING |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Thread Length | 0.200 INCHES NOMINAL IN |
| Head Height | 0.060 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Thread Quantity Per Inch | 40 |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4-40X1/4 | Textron Inc Camcar Div Sems Products Unit (USA) |
| H21-001-004 | L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications (USA) |
| H21-0001-004 PRIMARY | L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications (USA) |
| CRESTCUP4-40X1/4 | Textron Fastening Systems Dba Decorah Operations Tfs (USA) |
NSN 5305-01-331-0030 is a Screw,machine, manufactured by L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-01-331-0030 has 4 cross-referenced part numbers: 4-40X1/4 (Textron Inc Camcar Div Sems Products Unit), H21-001-004 (L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications), H21-0001-004 (L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications), CRESTCUP4-40X1/4 (Textron Fastening Systems Dba Decorah Operations Tfs).
There are 6 known substitutes for 5305-01-331-0030: 5305-00-116-4101, 5305-00-151-3576, 5305-00-811-5703 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for H21-0001-004: Head Style: PAN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Thread Class: 2A A. 13 total characteristics are documented in the Federal Logistics Information System.