The Packing Nut, cataloged under National Stock Number 4730-00-553-2815, 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 Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems. Government technical data includes 8 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-553-2815 |
| Primary Part Number | 45139 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND |
| Screw Thread Location | INTERNAL |
| Material | STEEL COMP 630 |
| Thread Length | 0.075 INCHES NOMINAL IN |
| Thread Class | 2B |
| Casehardening Indicator | NOT CASEHARDENED |
| Screw Thread Series Designator | UNS |
| Thread Size | 3/4IN-40 IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 45139 PRIMARY | Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA) |
NSN 4730-00-553-2815 is a Packing Nut, manufactured by Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-553-2815 has 1 cross-referenced part number: 45139 (Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems).
There are 4 known substitutes for 4730-00-553-2815: 3455-00-232-9042, 5930-00-666-1606, 5130-01-483-2186 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 45139: Thread Direction: RIGHT-HAND; Screw Thread Location: INTERNAL; Material: STEEL COMP 630; Thread Length: 0.075 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.