The Packing Nut, cataloged under National Stock Number 4730-00-541-2173, 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 Sae International Dba Sae International. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-541-2173 |
| Primary Part Number | MS21937W8H |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Major Unthreaded Outside Diameter | 1.000 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Unthreaded Portion Length | 0.156 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Largest Inside Diameter | 0.875 INCHES NOMINAL IN |
| Length to Shoulder | 0.344 INCHES NOMINAL IN |
| Style Designator | HEXAGON, INTERNAL THREAD, SHOULDERED |
| Material | ALUMINUM ALLOY 7075 |
| Screw Thread Location | INTERNAL |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Thread Size | 0.7500-16 |
| Thread Class | 3B |
| Thread Direction | RIGHT-HAND |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AS18280 | Society of Automotive Engineers Inc (USA) |
| 105-01488 | Precision Form Rivet Inc (USA) |
| MS21937W8H | Society of Automotive Engineers Inc (USA) |
| 759-100-9 | Safran Electronics & Defense, Avionics Usa, Llc Dba Use CAGE Code 879b2 for Cataloging (USA) |
| AS18280 | Sae International Dba Sae International (USA) |
| MS21937-8H | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 105-01488 | Dana Corp Weatherhead Div (USA) |
| AS21937 | Sae International Dba Sae International (USA) |
| AS21937 | Society of Automotive Engineers Inc (USA) |
| SAE-AS18280 | Sae International Dba Sae International (USA) |
| MS21937W8H PRIMARY | Sae International Dba Sae International (USA) |
NSN 4730-00-541-2173 is a Packing Nut, manufactured by Sae International Dba Sae International, classified under FSC 4730 (No Item Name Available). Status: cancelled.
NSN 4730-00-541-2173 has 11 cross-referenced part numbers: AS18280 (Society of Automotive Engineers Inc), 105-01488 (Precision Form Rivet Inc), MS21937W8H (Society of Automotive Engineers Inc), 759-100-9 (Safran Electronics & Defense, Avionics Usa, Llc Dba Use CAGE Code 879b2 for Cataloging), AS18280 (Sae International Dba Sae International) and 6 more.
There are 3 known substitutes for 4730-00-541-2173: 4730-00-433-2974, 4730-00-684-0564, 4730-00-821-0189. Verify interchangeability with system specifications before substitution.
Key specifications for MS21937W8H: Major Unthreaded Outside Diameter: 1.000 INCHES NOMINAL IN; Screw Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF); Unthreaded Portion Length: 0.156 INCHES NOMINAL IN; Casehardening Indicator: NOT CASEHARDENED. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 4730-00-541-2173 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.