The Thumbscrew, cataloged under National Stock Number 5305-00-143-1331, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mandzak Instrumentation Specialists Inc. Government technical data includes 17 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-143-1331 |
| Primary Part Number | 20659-1 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Mandzak Instrumentation Specialists Inc |
| Status | ACTIVE |
| Head Style | THUMB NO. 3 |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Externally Relieved Body Diameter Quantity | 1 |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.420 INCHES NOMINAL IN |
| Fastener Length | 0.590 INCHES NOMINAL IN |
| Point Style | FLAT |
| Width Between Flats | 0.320 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Head Height | 0.360 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 32 |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| First Diameter From Head | 0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Thread Length | 0.170 INCHES MINIMUM IN |
| Thread Class | 2A A |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20659-1 | Mandzak Instrumentation Specialists Inc (USA) |
NSN 5305-00-143-1331 is a Thumbscrew, manufactured by Mandzak Instrumentation Specialists Inc, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-143-1331 has 1 cross-referenced part number: 20659-1 (Mandzak Instrumentation Specialists Inc).
There are 3 known substitutes for 5305-00-143-1331: 6605-00-335-9905, 5330-00-583-3740, 3120-01-237-9222. Verify interchangeability with system specifications before substitution.
Key specifications for 20659-1: Head Style: THUMB NO. 3; Surface Treatment: CADMIUM AND CHROMATE OVERALL; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Externally Relieved Body Diameter Quantity: 1. 17 total characteristics are documented in the Federal Logistics Information System.