The Packing Nut, cataloged under National Stock Number 4730-00-422-8789, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Illinois Tool Works Inc.. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references 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 | 4730-00-422-8789 |
| Primary Part Number | MB-19-K5 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Illinois Tool Works Inc. |
| Status | ACTIVE |
| Thread Class | 2A A |
| Casehardening Indicator | NOT CASEHARDENED |
| Smallest Inside Diameter | 0.141 INCHES NOMINAL IN |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Screw Thread Location | EXTERNAL |
| Style Designator | HEXAGON, EXTERNAL THREAD, INVERTED FLARE |
| Material | STEEL CORROSION RESISTING |
| Seat Angle in Deg | 60.0 |
| Screw Thread Series Designator | UNS |
| Thread Length | 0.188 INCHES NOMINAL IN |
| Thread Size | 0.438-24 |
| Thread Direction | RIGHT-HAND |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4730-00-422-8789 is a Packing Nut, manufactured by Illinois Tool Works Inc., classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-422-8789 has 2 cross-referenced part numbers: MB19 (Illinois Tool Works Inc.), MB-19-K5 (Illinois Tool Works Inc.).
There are 3 known substitutes for 4730-00-422-8789: 6115-00-081-2035, 5330-00-121-2654, 6115-00-689-4486. Verify interchangeability with system specifications before substitution.
Key specifications for MB-19-K5: Overall Length: 0.469 INCHES NOMINAL IN; Thread Class: 2A A; Casehardening Indicator: NOT CASEHARDENED; Smallest Inside Diameter: 0.141 INCHES NOMINAL IN. 13 total characteristics are documented in the Federal Logistics Information System.