The Tee,boss, cataloged under National Stock Number 4730-00-201-9591, 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 Rockwell Collins Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-201-9591 |
| Primary Part Number | 21738-3 |
| Item Name | Tee,boss |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Rockwell Collins Inc |
| Status | CANCELLED |
| Material Document and Classification | QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Leg Length | 0.683 INCHES NOMINAL SECOND END IN |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Thread Class | 2B ALL ENDS |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Surface Treatment | ANODIZE OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Material Document and Classification | QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | GASKET SEAL (BOSS) ALL ENDS |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Leg Length | 0.967 INCHES NOMINAL FIRST END IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| Leg Length | 0.863 INCHES MINIMUM AND 0.873 INCHES MAXIMUM THIRD END IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| A51K9035-1 | Northrop Grumman Systems Corporation (USA) |
| 21738 | Rockwell Collins Inc (USA) |
| A51K9035-1 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems (USA) |
| 21738-3 PRIMARY | Rockwell Collins Inc (USA) |
NSN 4730-00-201-9591 is a Tee,boss, manufactured by Rockwell Collins Inc, classified under FSC 4730 (No Item Name Available). Status: cancelled.
NSN 4730-00-201-9591 has 4 cross-referenced part numbers: A51K9035-1 (Northrop Grumman Systems Corporation), 21738 (Rockwell Collins Inc), A51K9035-1 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems), 21738-3 (Rockwell Collins Inc).
There are 11 known substitutes for 4730-00-201-9591: 5895-00-051-4758, 5930-00-091-9254, 4320-00-116-3636 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21738-3: Material Document and Classification: QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Leg Length: 0.683 INCHES NOMINAL SECOND END IN; Material: ALUMINUM ALLOY 6061 OVERALL. 22 total characteristics are documented in the Federal Logistics Information System.
NSN 4730-00-201-9591 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.