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PartsTable / COMPONENT / M1818012 04A01
M1818012 04A01 ✓ 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: 0.562 INCHES NOMINAL IN, neck_height: 0.188 INCHES NOMINAL IN, socket_depth: 0.562 INCHES NOMINAL IN, flange_diameter: 4.625 INCHES NOMINAL IN, socket_diameter: 1.700 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-022-5679, 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
M1818012 04A01
NSN: 4730-01-022-5679
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
thickness0.562 INCHES NOMINAL IN
neck_height0.188 INCHES NOMINAL IN
socket_depth0.562 INCHES NOMINAL IN
flange_diameter4.625 INCHES NOMINAL IN
socket_diameter1.700 INCHES NOMINAL IN
special_featuresFLANGES CONFORM TO ASA STANDARD B16.5
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.500 INCHES NOMINAL IN
bolt_hole_quantity4
raised_face_height0.062 INCHES NOMINAL IN
bolt_circle_diameter3.500 INCHES NOMINAL IN
NSN4730-01-022-5679
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M1818012 04A01 · 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: 1.700 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A105 MIL SPEC SINGLE MATERIAL RESPONSE
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
MATERIAL: STEEL
•
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
•
BOLT HOLE QUANTITY: 4
•
SOCKET DEPTH: 0.562 INCHES NOMINAL IN
•
RAISED FACE DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SOCKET DIAMETER1.700 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A105 MIL SPEC SINGLE MATERIAL RESPONSE
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
MATERIALSTEEL
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
BOLT HOLE QUANTITY4
SOCKET DEPTH0.562 INCHES NOMINAL IN
RAISED FACE DIAMETER2.500 INCHES NOMINAL IN
FLANGE SECTION STYLERAISED FACE, SOCKET NECK
FLANGE DIAMETER4.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
B16-5-1953TABLE21Interchangeable
interchangeable cross-reference
interchangeable
29513Interchangeable
interchangeable cross-reference
interchangeable
DH29513Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-18180/2Interchangeable
interchangeable cross-reference
interchangeable
M18180/2-56A01AInterchangeable
interchangeable cross-reference
interchangeable
SW-7302 1 1/2INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M1818012 04A01?
M1818012 04A01 is a THERMAL RELEASE,CIRCUIT BREAKER.
What parts can replace M1818012 04A01?
There are 22 known substitutes for M1818012 04A01: B16-5-1953TABLE21, 29513, DH29513 and 19 more. Substitute compatibility should be verified for your specific system.
Is M1818012 04A01 still available?
M1818012 04A01 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026