The Nipple,tube, cataloged under National Stock Number 4730-00-004-2799, 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 Northrop Grumman Systems Corporation. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-004-2799 |
| Primary Part Number | GC550FA16 |
| Item Name | Nipple,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Connection Style | CUSHION SEAL (TUBE) ALL ENDS |
| Nominal Overall Length | 1.928 INCHES IN |
| Criticality Code Justification | FEAT |
| Style Designator | LONG W/ OFFSET WRENCHING FACILITY |
| Material Document and Classification | AMS 4965,6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 0.438 INCHES MINIMUM AND 0.475 INCHES MAXIMUM SECOND END IN |
| Leg Length | 1.062 INCHES MINIMUM AND 1.097 INCHES MAXIMUM FIRST END IN |
| Nominal Thread Size | 1.250 INCHES FIRST END BULKHEAD IN |
| Nominal Thread Size | 1.250 INCHES ALL ENDS IN |
| Maximum Operating Temp | 274.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | AERONAUTICAL FLUID FIRST RESPONSE |
| Media for Which Designed | AIR SECOND RESPONSE |
| Thread Class | 3A FIRST END BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 14 FIRST END BULKHEAD |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNJS ALL ENDS |
| Thread Series Designator | UNJS FIRST END BULKHEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| GC550FA16 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| R44358T-16 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division (USA) |
| AP301T16 PRIMARY | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| AFP2001T1616 PRIMARY | Aerofit, Llc (USA) |
| Reference | Meaning |
|---|---|
| AE16338-16 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| ST7M215 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 1520-13279-16 | 5/9 Secondary reference U.S. Government activity |
| GC550FA | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| AE16117-16 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| TF301T16 | 5/9 Secondary reference Smiths Tubular Systems-Laconia, Inc. |
| R44102T16 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division |
| TF301T16-16 | 5/9 Secondary reference Smiths Tubular Systems-Laconia, Inc. |
| ST7M215T16 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 4730-00-004-2799 is a Nipple,tube, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-004-2799 has 4 manufacturer part numbers on file: GC550FA16 (Northrop Grumman Systems Corporation), R44358T-16 (Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division), AP301T16 (Sps Technologies, Llc Dba Airdrome Precision Components), AFP2001T1616 (Aerofit, Llc).
5 possible matches (shared part number, not a government interchangeability claim): 4730-00-004-2800, 4730-00-275-9458, 4730-00-277-1210. Verify interchangeability with system specifications before substitution.
Key specifications for GC550FA16: Connection Style: CUSHION SEAL (TUBE) ALL ENDS; Nominal Overall Length: 1.928 INCHES IN; Criticality Code Justification: FEAT; Style Designator: LONG W/ OFFSET WRENCHING FACILITY. 21 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.
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.