4730-01-123-1579 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Flange,pipe — FSC 4730
Flange Diameter: 13.125 INCHES NOMINAL IN
Face Seating Surface Condition: MACHINED
Maximum Operating Temp and Media for Which Designed: 150.0 FAHRENHEIT WATER, SALT DEGF
Tube Outside Diameter for Which Designed: 8.000 INCHES NOMINAL IN
Operating Pressure and Type: 700.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Flange Section Style: PLAIN FACE, WELDING NECK
Style Designator: ROUND, ONE BOLT HOLE CIRCLE
Identification
NSN: 4730-01-123-1579
NIIN: 011231579
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 4730-01-123-1579, 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 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
150.0 FAHRENHEIT WATER, SALT DEGF
Tube Outside Diameter for Which Designed
8.000 INCHES NOMINAL IN
Operating Pressure and Type
700.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Flange Section Style
PLAIN FACE, WELDING NECK
Style Designator
ROUND, ONE BOLT HOLE CIRCLE
Bolt Hole Diameter
0.688 INCHES NOMINAL IN
Neck Height
2.750 INCHES NOMINAL IN
Material Document and Classification
MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE
Groove Depth
0.108 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
Groove Pitch Diameter
8.875 INCHES NOMINAL IN
Bolt Hole Quantity
16
Bolt Circle Diameter
11.375 INCHES NOMINAL IN
Material
NICKEL ALLOY
Groove Width
0.125 INCHES NOMINAL IN
Thickness
1.625 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 Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-138-6489810-1385861TYG4INPOSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Sea Systems Command
4730-01-139-4432810-1385861TYP3INPOSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Sea Systems Command
4730-01-282-5124810-1385861 TYG 3.5INPOSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Sea Systems Command
4730-01-303-2497810-1385861TYP10INMODPOSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Ship Systems Command
4730-01-309-8150704-4685262 ITEM F12POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Ship Systems Command
4730-01-318-84664684449-T/F1POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Ship Systems Command
4220-01-343-3447262112601-0037APOSSIBLE MATCH
DIFFUSER,AIR SUPPLY
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-690-3933810-1385861TYG,3INPOSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Sea Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
810-1385861
D/9Drawing number reference only
U.S. Government activity
13-08-0515
C/1Advisory reference — outside the item-of-supply concept
U.S. Government activity
810-1385861TYG8IN
3/2Design control — primary reference
U.S. Government activity
Related Parts
4730-01-138-6489POSSIBLE MATCH
FLANGE,PIPE
810-1385861TYG4IN
4730-01-139-4432POSSIBLE MATCH
FLANGE,PIPE
810-1385861TYP3IN
4730-01-282-5124POSSIBLE MATCH
FLANGE,PIPE
810-1385861 TYG 3.5IN
4730-01-303-2497POSSIBLE MATCH
FLANGE,PIPE
810-1385861TYP10INMOD
4730-01-309-8150POSSIBLE MATCH
FLANGE,PIPE
704-4685262 ITEM F12
4730-01-318-8466POSSIBLE MATCH
FLANGE,PIPE
4684449-T/F1
4220-01-343-3447POSSIBLE MATCH
DIFFUSER,AIR SUPPLY
262112601-0037A
4730-01-690-3933POSSIBLE MATCH
FLANGE,PIPE
810-1385861TYG,3IN
Frequently Asked Questions
What is NSN 4730-01-123-1579?
NSN 4730-01-123-1579 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-01-123-1579?
8 possible matches (shared part number, not a government interchangeability claim): 4730-01-138-6489, 4730-01-139-4432, 4730-01-282-5124. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-01-123-1579?
Key specifications for 4730-01-123-1579: Flange Diameter: 13.125 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Maximum Operating Temp and Media for Which Designed: 150.0 FAHRENHEIT WATER, SALT DEGF; Tube Outside Diameter for Which Designed: 8.000 INCHES NOMINAL IN. 17 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-123-1579 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.