The Screw,shoulder, cataloged under National Stock Number 5305-00-005-3621, 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 17 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-005-3621 |
| Primary Part Number | 4438 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Width Across Flats | 0.156 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Shoulder Diameter | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM FIRST SHOULDER IN |
| Head Style | FLAT CHAMFER |
| Shoulder Length | 0.313 INCHES MINIMUM AND 0.315 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Quantity Per Inch | 20 |
| Internal Drive Style | HEXAGON |
| Material Document and Classification | ASTM 582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL COMP 303 OVERALL |
| Fastener Length | 0.751 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Head Diameter | 0.500 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Length | 0.438 INCHES NOMINAL IN |
| Head Height | 0.219 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5305-00-005-3621 is a Screw,shoulder, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-005-3621 has 2 cross-referenced part numbers: 104-44-29 (Zf Industrieantriebe Witten Gmbh), 4438 (Roller Bearing Co of America, Inc Div Pic Design).
There are 8 known substitutes for 5305-00-005-3621: 3110-00-117-0777, 3110-00-156-1833, 4730-00-287-1701 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4438: Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Width Across Flats: 0.156 INCHES NOMINAL IN; Thread Class: 2A A; Nominal Thread Diameter: 0.250 INCHES IN. 17 total characteristics are documented in the Federal Logistics Information System.