The Thumbscrew, cataloged under National Stock Number 5305-00-018-0043, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 18 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 | 5305-00-018-0043 |
| Primary Part Number | 661601 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Thread Direction | RIGHT-HAND |
| Head Diameter | 0.250 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 40 |
| Surface Treatment | PASSIVATE OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Shoulder Diameter | 0.160 INCHES NOMINAL FIRST SHOULDER IN |
| Fastener Length | 0.980 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Material | STEEL COMP 303 OVERALL |
| Shoulder Length | 0.600 INCHES NOMINAL FIRST SHOULDER IN |
| Head Height | 0.220 INCHES NOMINAL IN |
| Head Style | KNURLED NO. 1 |
| Thread Length | 0.170 INCHES MINIMUM IN |
| Point Style | FLAT |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 661601 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
NSN 5305-00-018-0043 is a Thumbscrew, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-018-0043 has 1 cross-referenced part number: 661601 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
There are 3 known substitutes for 5305-00-018-0043: 6650-01-149-8430, 6920-01-166-8334, 5950-01-366-9538. Verify interchangeability with system specifications before substitution.
Key specifications for 661601: Shoulder Shape: ROUND FIRST SHOULDER; Thread Direction: RIGHT-HAND; Head Diameter: 0.250 INCHES NOMINAL IN; Thread Quantity Per Inch: 40. 18 total characteristics are documented in the Federal Logistics Information System.