The Screw,machine, cataloged under National Stock Number 5305-00-042-1721, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is General Motors Corp. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-042-1721 |
| Primary Part Number | 421721 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Screw Material | COPPER ALLOY |
| Head Height | 0.067 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 1 TYPE AND 1S STYLE |
| Head Style | ROUND |
| Fastener Length | 0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.146 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 48 |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Nominal Thread Diameter | 0.099 INCHES IN |
| Head Diameter | 0.169 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 421721 | General Motors Corp (USA) |
| 421721 | Army Weapons Command Attn Amswe-Ree-S (USA) |
| FFS92TYPE1STYLE1S | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| 39-10 | Acf Industries Inc Carter Carburetor Div |
| 421721 | General Motors Llc Dba General Motors Llc (USA) |
NSN 5305-00-042-1721 is a Screw,machine, manufactured by General Motors Corp, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-042-1721 has 5 cross-referenced part numbers: 421721 (General Motors Corp), 421721 (Army Weapons Command Attn Amswe-Ree-S), FFS92TYPE1STYLE1S (Federal Specifications Promulgated by General Services Administration Washington DC), 39-10 (Acf Industries Inc Carter Carburetor Div), 421721 (General Motors Llc Dba General Motors Llc).
There are 12 known substitutes for 5305-00-042-1721: 3110-00-156-1885, 5331-00-167-5174, 6810-00-234-8378 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 421721: Internal Drive Style: CROSS RECESS TYPE 1; Screw Material: COPPER ALLOY; Head Height: 0.067 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND. 15 total characteristics are documented in the Federal Logistics Information System.