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M181801205A01A — THERMAL RELEASE,CIRCUIT BREAKER

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

M181801205A01A: THERMAL RELEASE,CIRCUIT BREAKER.

THERMAL RELEASE,CIRCUIT BREAKER. Key specifications include material: STEEL, thickness: 0.690 INCHES NOMINAL IN, neck_height: 0.188 INCHES NOMINAL IN, socket_depth: 0.620 INCHES NOMINAL IN, flange_diameter: 5.000 INCHES NOMINAL IN, socket_diameter: 1.950 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-023-7772, 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
M181801205A01A
NSN: 4730-01-023-7772
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
thickness0.690 INCHES NOMINAL IN
neck_height0.188 INCHES NOMINAL IN
socket_depth0.620 INCHES NOMINAL IN
flange_diameter5.000 INCHES NOMINAL IN
socket_diameter1.950 INCHES NOMINAL IN
special_featuresFLANGES CONFORM TOASA STANDARD B16.5
style_designatorROUND, ONE BOLT HOLE CIRCLE
surface_treatmentPAINT
bolt_hole_diameter0.620 INCHES NOMINAL IN
bolt_hole_quantity4
raised_face_height0.062 INCHES NOMINAL IN
NSN4730-01-023-7772
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M181801205A01A · 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: 1.950 INCHES NOMINAL IN
•
FLANGE DIAMETER: 5.000 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: SERRATED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 1.500 INCHES IN
•
SOCKET DEPTH: 0.620 INCHES NOMINAL IN
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 400.0 FAHRENHEIT GAS AND 400.0 FAHRENHEIT OIL AND 400.0 FAHRENHEIT WATER DEGF
•
OPERATING PRESSURE AND TYPE: 150.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
FLANGE SECTION STYLE: RAISED FACE, SOCKET NECK
TECHNICAL CHARACTERISTICS
SOCKET DIAMETER1.950 INCHES NOMINAL IN
FLANGE DIAMETER5.000 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONSERRATED
NOMINAL PIPE SIZE FOR WHICH DESIGNED1.500 INCHES IN
SOCKET DEPTH0.620 INCHES NOMINAL IN
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED400.0 FAHRENHEIT GAS AND 400.0 FAHRENHEIT OIL AND 400.0 FAHRENHEIT WATER DEGF
OPERATING PRESSURE AND TYPE150.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
FLANGE SECTION STYLERAISED FACE, SOCKET NECK
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.620 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 6
B16.5Reference document
Same NSN cross-reference
Reference document — Secondary reference
ASME B16.5Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
MIL-F-18180Reference document
Same NSN cross-reference
Reference document — Secondary reference
B16-5-1-1-2IN-IPS150PSI-PP-FLGEReference document
Same NSN cross-reference
Reference document — Secondary reference
20-1 1/2 ASTMA-Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
29514Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M181801205A01A?
M181801205A01A is a THERMAL RELEASE,CIRCUIT BREAKER.
What parts can replace M181801205A01A?
There are 6 known substitutes for M181801205A01A: B16.5, ASME B16.5, MIL-F-18180 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M181801205A01A?
M181801205A01A is cataloged in the U.S. Government catalog under NSN 4730-01-023-7772. 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.