4730-00-256-8553 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Flange,pipe — FSC 4730
Flange Diameter: 3.812 INCHES NOMINAL IN
Face Seating Surface Condition: SERRATED
Nominal Pipe Size for Which Designed: 0.750 INCHES IN
Maximum Operating Temp and Media for Which Designed: 775.0 FAHRENHEIT STEAM AND 300.0 FAHRENHEIT GAS AND 300.0 FAHRENHEIT OIL AND 300.0 FAHRENHEIT WATER DEGF
Operating Pressure and Type: 150.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Flange Section Style: PLAIN FACE
Style Designator: ROUND, ONE BOLT HOLE CIRCLE
Identification
NSN: 4730-00-256-8553
NIIN: 002568553
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description
The Flange,pipe, cataloged under National Stock Number 4730-00-256-8553, 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 14 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Maximum Operating Temp and Media for Which Designed
775.0 FAHRENHEIT STEAM AND 300.0 FAHRENHEIT GAS AND 300.0 FAHRENHEIT OIL AND 300.0 FAHRENHEIT WATER DEGF
Operating Pressure and Type
150.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 200.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Flange Section Style
PLAIN FACE
Style Designator
ROUND, ONE BOLT HOLE CIRCLE
Bolt Hole Diameter
0.562 INCHES NOMINAL IN
Departure From Cited Designator
AS MODIFIED BY THK OF FLANGE
Nondefinitive Spec/std Data
C TYPE
Bolt Hole Quantity
4
Bolt Circle Diameter
2.687 INCHES NOMINAL IN
Material
STEEL
Thickness
0.438 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-00-256-8554POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8555POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8556POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8557POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8558POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8559POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8560POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8561POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8563POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
4730-00-256-8565POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MIL-F-20670, TYPE C, SZ 3/4 INCH
2/2Government specification standardization
U.S. Government activity
MILF20670
5/9Secondary reference
U.S. Government activity
B110TYPEC
5/1Secondary reference
U.S. Government activity
MILF20670
4/1Identification reference
U.S. Government activity
MILF20670
5/9Secondary reference
U.S. Government activity
Related Parts
4730-00-256-8554POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8555POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8556POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8557POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8558POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8559POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8560POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8561POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8563POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8565POSSIBLE MATCH
FLANGE,PIPE
4730-00-256-8567POSSIBLE MATCH
FLANGE,PIPE
Frequently Asked Questions
What is NSN 4730-00-256-8553?
NSN 4730-00-256-8553 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-00-256-8553?
11 possible matches (shared part number, not a government interchangeability claim): 4730-00-256-8554, 4730-00-256-8555, 4730-00-256-8556. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-00-256-8553?
Key specifications for 4730-00-256-8553: Flange Diameter: 3.812 INCHES NOMINAL IN; Face Seating Surface Condition: SERRATED; Nominal Pipe Size for Which Designed: 0.750 INCHES IN; Maximum Operating Temp and Media for Which Designed: 775.0 FAHRENHEIT STEAM AND 300.0 FAHRENHEIT GAS AND 300.0 FAHRENHEIT OIL AND 300.0 FAHRENHEIT WATER DEGF. 14 specifications are documented in the U.S. Government catalog.
Is NSN 4730-00-256-8553 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.