The Tee,tube, cataloged under National Stock Number 4730-01-172-0581, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-172-0581 |
| Primary Part Number | SS49MC909J4-28S |
| Item Name | Tee,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 MICRON FILTER AND 1 RESTRICTOR |
| Surface Treatment Document and Classification | MIL-C-22750 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Material Document and Classification | 66,300 SERIES FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.500 INCHES NOMINAL THIRD END IN |
| Leg Length | 0.935 INCHES MINIMUM AND 0.955 INCHES MAXIMUM FIRST END IN |
| Leg Length | 0.935 INCHES MINIMUM AND 0.955 INCHES MAXIMUM SECOND END IN |
| Reduced Passage Nominal Inside Diameter | 0.0087 INCHES THIRD END IN |
| Nominal Thread Size | 0.438 INCHES THIRD END BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Thread Class | 3A THIRD END BULKHEAD A |
| Material | STEEL COMP 304 OR STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) THIRD END BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SS49MC909J4-28S PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| JSFA2890904JS | 5/2 Secondary reference U.S. Government activity |
| SS49 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 4730-01-172-0581 is a Tee,tube, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-172-0581 has 1 manufacturer part number on file: SS49MC909J4-28S (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for SS49MC909J4-28S: Furnished Items and Quantity: 2 MICRON FILTER AND 1 RESTRICTOR; Surface Treatment Document and Classification: MIL-C-22750 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: FLARELESS (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 20 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4730-01-172-0581 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.