The Nut,tube Coupling, cataloged under National Stock Number 4730-00-222-8636, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 3 manufacturers, 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 | 4730-00-222-8636 |
| Primary Part Number | MS21921W4 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Material | ALUMINUM ALLOY 7075 OVERALL |
| Seat Angle | 45.00 DEGREES NOMINAL |
| Nut Height | 0.719 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 20 |
| Surface Treatment | ANODIZE OVERALL |
| Nominal Tube Outside Diameter | 0.250 INCHES IN |
| Length to Shoulder | 0.547 INCHES NOMINAL IN |
| Nominal Thread Size | 0.438 INCHES IN |
| Nut Style | TUBE COUPLING |
| Smallest Inside Diameter | 0.300 INCHES NOMINAL IN |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Thread Direction | RIGHT-HAND |
| Material Document and Classification | QQ-A-225/9,T73 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Class | 3B |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| SAE-AS18280 | Sae International Dba Sae International (USA) |
| MS21921W4 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| MS21921D4 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| AS21921 | Society of Automotive Engineers Inc (USA) |
| MS21921W4 PRIMARY | Sae International Dba Sae International (USA) |
| MS21921-4W | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| AS18280 | Society of Automotive Engineers Inc (USA) |
| AS21921 | Sae International Dba Sae International (USA) |
| AS18280 | Sae International Dba Sae International (USA) |
| MS21921W4 | Society of Automotive Engineers Inc (USA) |
NSN 4730-00-222-8636 is a Nut,tube Coupling, manufactured by Sae International Dba Sae International, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-222-8636 has 10 cross-referenced part numbers: SAE-AS18280 (Sae International Dba Sae International), MS21921W4 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MS21921D4 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), AS21921 (Society of Automotive Engineers Inc), MS21921W4 (Sae International Dba Sae International) and 5 more.
There are 3 known substitutes for 4730-00-222-8636: 4730-00-554-8015, 4730-00-555-8203, 4730-01-667-6443. Verify interchangeability with system specifications before substitution.
Key specifications for MS21921W4: Material: ALUMINUM ALLOY 7075 OVERALL; Seat Angle: 45.00 DEGREES NOMINAL; Nut Height: 0.719 INCHES NOMINAL IN; Thread Quantity Per Inch: 20. 15 total characteristics are documented in the Federal Logistics Information System.