The Flange,pipe, cataloged under National Stock Number 4730-01-023-7770, 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 Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-023-7770 |
| Primary Part Number | 20-3/4 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy |
| Status | ACTIVE |
| Flange Section Style | RAISED FACE, SOCKET NECK |
| Operating Pressure and Type | 150.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.620 INCHES NOMINAL IN |
| Raised Face Height | 0.062 INCHES NOMINAL IN |
| Surface Treatment | PAINT |
| Material Document and Classification | ASTM A181,GRADE 1 ASSN STD SINGLE MATERIAL RESPONSE |
| Maximum Operating Temp and Media for Which Designed | 400.0 FAHRENHEIT GAS AND 400.0 FAHRENHEIT OIL AND 400.0 FAHRENHEIT WATER DEGF |
| Flange Diameter | 3.875 INCHES NOMINAL IN |
| Thickness | 0.500 INCHES NOMINAL IN |
| Neck Height | 0.125 INCHES NOMINAL IN |
| Raised Face Diameter | 1.500 INCHES NOMINAL IN |
| Material | STEEL |
| Socket Depth | 0.440 INCHES NOMINAL IN |
| Socket Diameter | 1.090 INCHES NOMINAL IN |
| Nominal Pipe Size for Which Designed | 0.750 INCHES IN |
| Bolt Circle Diameter | 2.750 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Face Seating Surface Condition | SERRATED |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20-3/4 | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA) |
| ASME B16.5 | The American Society of Mechanical Engineers (USA) |
| 20-3/4 ASTMA-10 | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA) |
| M18180/2-02A04A | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 2951) | Crane Co Midwest Fittings Div (USA) |
| B16.5-3/4 | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
NSN 4730-01-023-7770 is a Flange,pipe, manufactured by Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-01-023-7770 has 6 cross-referenced part numbers: 20-3/4 (Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy), ASME B16.5 (The American Society of Mechanical Engineers), 20-3/4 ASTMA-10 (Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy), M18180/2-02A04A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 2951) (Crane Co Midwest Fittings Div) and 1 more.
There are 11 known substitutes for 4730-01-023-7770: 5120-00-032-9454, 5910-00-166-9847, 4730-00-317-3877 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20-3/4: Flange Section Style: RAISED FACE, SOCKET NECK; Operating Pressure and Type: 150.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS; Style Designator: ROUND, ONE BOLT HOLE CIRCLE; Bolt Hole Diameter: 0.620 INCHES NOMINAL IN. 21 total characteristics are documented in the Federal Logistics Information System.