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PartsTable / COMPONENT / MIL-F-18180
MIL-F-18180 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

THERMAL RELEASE,CIRCUIT BREAKER. Key specifications include material: STEEL, thickness: 0.563 INCHES NOMINAL IN, neck_height: 2.063 INCHES NOMINAL IN, flange_diameter: 3.750 INCHES NOMINAL IN, style_designator: ROUND, ONE BOLT HOLE CIRCLE, bolt_hole_diameter: 0.625 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-174-5943, 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
MIL-F-18180
NSN: 4730-00-174-5943
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
thickness0.563 INCHES NOMINAL IN
neck_height2.063 INCHES NOMINAL IN
flange_diameter3.750 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.625 INCHES NOMINAL IN
bolt_hole_quantity4
raised_face_height0.250 INCHES NOMINAL IN
bolt_circle_diameter2.625 INCHES NOMINAL IN
flange_section_styleRAISED FACE, WELDING NECK
raised_face_diameter1.375 INCHES NOMINAL IN
nondefinitive_spec/std_data18 TABLE
NSN4730-00-174-5943
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-F-18180 · 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
•
MATERIAL: STEEL
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 850.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A182 GRADE F11 ASSN STD SINGLE MATERIAL RESPONSE
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY FLANGE,PIPE,1-1/2 IN. NOM PIPE SIZE IN
•
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
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 1.500 INCHES IN
•
SOCKET DIAMETER: 1.915 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED850.0 FAHRENHEIT STEAM AND 425.0 FAHRENHEIT WATER DEGF
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A182 GRADE F11 ASSN STD SINGLE MATERIAL RESPONSE
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY FLANGE,PIPE,1-1/2 IN. NOM PIPE SIZE IN
OPERATING PRESSURE AND TYPE600.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 1000.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
NOMINAL PIPE SIZE FOR WHICH DESIGNED1.500 INCHES IN
SOCKET DIAMETER1.915 INCHES NOMINAL IN
RAISED FACE HEIGHT0.250 INCHES NOMINAL IN
BOLT HOLE DIAMETER0.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
5000S4823-64496Interchangeable
interchangeable cross-reference
interchangeable
ASME B16.5Interchangeable
interchangeable cross-reference
interchangeable
B16.5Interchangeable
interchangeable cross-reference
interchangeable
ASAB16-5Interchangeable
interchangeable cross-reference
interchangeable
B16-5-1961Interchangeable
interchangeable cross-reference
interchangeable
640D339 PIECE 5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-F-18180?
MIL-F-18180 is a THERMAL RELEASE,CIRCUIT BREAKER.
What parts can replace MIL-F-18180?
There are 13 known substitutes for MIL-F-18180: 5000S4823-64496, ASME B16.5, B16.5 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-F-18180?
MIL-F-18180 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-174-5943. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026