The Flange,pipe, cataloged under National Stock Number 4730-00-174-5937, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-174-5937 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Socket Diameter | 0.555 INCHES NOMINAL IN |
| Flange Diameter | 3.375 INCHES NOMINAL IN |
| Face Seating Surface Condition | SERRATED |
| Nominal Pipe Size for Which Designed | 0.250 INCHES IN |
| Maximum Operating Temp and Media for Which Designed | 850.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF |
| Operating Pressure and Type | 600.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 1000.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Flange Section Style | RAISED FACE, SOCKET NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.562 INCHES NOMINAL IN |
| Neck Height | 0.500 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A182,GRADE F11 ASSN STD SINGLE MATERIAL RESPONSE AND ASTM A217,GRADE WC-6 ASSN STD SINGLE MATERIAL RESPONSE |
| Departure From Cited Designator | AS MODIFIED BY FLANGE,PIPE,1/4 IN.NOM PIPE SIZE IN |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 2.250 INCHES NOMINAL IN |
| Raised Face Diameter | 1.625 INCHES NOMINAL IN |
| Raised Face Height | 0.250 INCHES NOMINAL IN |
| Material | STEEL |
| Thickness | 0.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS18308-1/4 | 5/9 Secondary reference U.S. Government activity |
| MS18308-1/4INCH | 2/2 Government specification standardization U.S. Government activity |
| 5000S4823-64496 | 5/1 Secondary reference U.S. Government activity |
| MS18308 | 4/1 Identification reference U.S. Government activity |
NSN 4730-00-174-5937 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-00-174-5938. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-174-5937: Socket Diameter: 0.555 INCHES NOMINAL IN; Flange Diameter: 3.375 INCHES NOMINAL IN; Face Seating Surface Condition: SERRATED; Nominal Pipe Size for Which Designed: 0.250 INCHES IN. 18 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.