The Screw,machine, cataloged under National Stock Number 5305-00-855-7556, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-855-7556 |
| Primary Part Number | 23978 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Fastener Length | 1.938 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Head Height | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Screw Surface Treatment | PASSIVATE |
| Thread Length | 1.938 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Screw Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 |
| Thread Quantity Per Inch | 40 |
| Head Diameter | 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Head Style | PAN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5305-00-855-7556 is a Screw,machine, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-855-7556 has 2 cross-referenced part numbers: 23978 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 23978 (United Technologies Corp Hamilton Sundstrand Corp).
There are 6 known substitutes for 5305-00-855-7556: 2530-00-278-2248, 3120-00-339-2592, 2995-00-397-5540 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for 23978: Fastener Length: 1.938 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND; Head Height: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Thread Class: 2A A. 13 total characteristics are documented in the Federal Logistics Information System.