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M181801202B01 — FLANGE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

M181801202B01: FLANGE,PIPE.

The FLANGE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL, thickness: 0.500 INCHES NOMINAL IN, neck_height: 0.125 INCHES NOMINAL IN, socket_depth: 0.438 INCHES NOMINAL IN, flange_diameter: 3.875 INCHES NOMINAL IN, socket_diameter: 1.094 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-236-6654, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
M181801202B01
NSN: 4730-01-236-6654
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
thickness0.500 INCHES NOMINAL IN
neck_height0.125 INCHES NOMINAL IN
socket_depth0.438 INCHES NOMINAL IN
flange_diameter3.875 INCHES NOMINAL IN
socket_diameter1.094 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.500 INCHES NOMINAL IN
bolt_hole_quantity4
bolt_circle_diameter2.750 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, SOCKET NECK
face_seating_surface_conditionMACHINED
NSN4730-01-236-6654
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M181801202B01 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SOCKET DIAMETER: 1.094 INCHES NOMINAL IN
•
FLANGE DIAMETER: 3.875 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: MACHINED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 0.750 INCHES IN
•
SOCKET DEPTH: 0.438 INCHES NOMINAL IN
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 500.0 FAHRENHEIT ANY ACCEPTABLE DEGF
•
FLANGE SECTION STYLE: PLAIN FACE, SOCKET NECK
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
TECHNICAL CHARACTERISTICS
SOCKET DIAMETER1.094 INCHES NOMINAL IN
FLANGE DIAMETER3.875 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONMACHINED
NOMINAL PIPE SIZE FOR WHICH DESIGNED0.750 INCHES IN
SOCKET DEPTH0.438 INCHES NOMINAL IN
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED500.0 FAHRENHEIT ANY ACCEPTABLE DEGF
FLANGE SECTION STYLEPLAIN FACE, SOCKET NECK
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.500 INCHES NOMINAL IN
NECK HEIGHT0.125 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
MIL-F-18180DReference document
Same NSN cross-reference
Reference document — Secondary reference
ASME B16.5Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
SWF7182-3/4 INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M181801202B01?
M181801202B01 is a FLANGE,PIPE.
What parts can replace M181801202B01?
There are 3 known substitutes for M181801202B01: MIL-F-18180D, ASME B16.5, SWF7182-3/4 IN. Substitute compatibility should be verified for your specific system.
What is the NSN for M181801202B01?
M181801202B01 is cataloged in the U.S. Government catalog under NSN 4730-01-236-6654. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.