The Thumbscrew, cataloged under National Stock Number 5305-01-294-6344, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corp. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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 | 5305-01-294-6344 |
| Primary Part Number | 129303-1 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Lockheed Martin Corp |
| Status | ACTIVE |
| Thread Class | 2A A |
| Fastener Length | 1.090 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 28 |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS |
| Head Height | 0.591 INCHES NOMINAL IN |
| Thread Length | 0.452 INCHES MINIMUM AND 0.466 INCHES MAXIMUM IN |
| Head Style | KNURLED NO. 6 |
| Criticality Code Justification | ZZZY |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Series Designator | UNF |
| Special Test Features | SPECIAL QUALITY CONTROL TESTING |
| Head Diameter | 0.175 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Point Style | CONE |
| Material | STEEL COMP 303 OVERALL |
| Material Document and Classification | ASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 129303-1 | Lockheed Martin Corp (USA) |
| 129303-1 | J & S Precision Products Co (inc) (USA) |
| LL-HQ5-9137 | Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA) |
NSN 5305-01-294-6344 is a Thumbscrew, manufactured by Lockheed Martin Corp, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-01-294-6344 has 3 cross-referenced part numbers: 129303-1 (Lockheed Martin Corp), 129303-1 (J & S Precision Products Co (inc)), LL-HQ5-9137 (Defense Logistics Agency Dba Defense Supply Center Philadelphia).
There are 2 known substitutes for 5305-01-294-6344: 5305-01-300-2926, 5970-01-332-8835. Verify interchangeability with system specifications before substitution.
Key specifications for 129303-1: Thread Class: 2A A; Fastener Length: 1.090 INCHES NOMINAL IN; Thread Quantity Per Inch: 28; Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS. 18 total characteristics are documented in the Federal Logistics Information System.