The Thumbscrew, cataloged under National Stock Number 5305-00-721-4589, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Roller Bearing Co of America, Inc Div Pic Design. Government technical data includes 13 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-721-4589 |
| Primary Part Number | 4049 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Material | STEEL OVERALL |
| Thread Length | 0.625 INCHES MINIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Height | 0.188 INCHES NOMINAL IN |
| Head Diameter | 0.750 INCHES NOMINAL IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Class | 2A A |
| Surface Treatment | PASSIVATE OVERALL |
| Point Style | FLAT |
| Thread Quantity Per Inch | 20 |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| PFFT305-001-01 | Us Army Aviation and Missile Command (USA) |
| 4049 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| PQ-4D-3 | W. M. Berg, Inc. (USA) |
NSN 5305-00-721-4589 is a Thumbscrew, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-721-4589 has 3 cross-referenced part numbers: PFFT305-001-01 (Us Army Aviation and Missile Command), 4049 (Roller Bearing Co of America, Inc Div Pic Design), PQ-4D-3 (W. M. Berg, Inc.).
There are 9 known substitutes for 5305-00-721-4589: 6645-00-225-2666, 5950-00-461-8305, 5999-00-468-3241 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4049: Material: STEEL OVERALL; Thread Length: 0.625 INCHES MINIMUM IN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Head Height: 0.188 INCHES NOMINAL IN. 13 total characteristics are documented in the Federal Logistics Information System.