PartsTable
Technical Data Sheet
12-00-3727 ✓ 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: 0.500 INCHES NOMINAL IN, neck_height: 0.062 INCHES NOMINAL IN, socket_depth: 0.500 INCHES NOMINAL IN, flange_diameter: 4.250 INCHES NOMINAL IN, socket_diameter: 1.360 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-023-7771, 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
12-00-3727
NSN: 4730-01-023-7771
FSC: 4730
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialSTEEL
thickness0.500 INCHES NOMINAL IN
neck_height0.062 INCHES NOMINAL IN
socket_depth0.500 INCHES NOMINAL IN
flange_diameter4.250 INCHES NOMINAL IN
socket_diameter1.360 INCHES NOMINAL IN
special_featuresFLANGES CONFORM TO ASA STANDARD B16.5
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.625 INCHES NOMINAL IN
bolt_hole_quantity4
raised_face_height0.062 INCHES NOMINAL IN
bolt_circle_diameter3.120 INCHES NOMINAL IN
NSN4730-01-023-7771
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 12-00-3727 · 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
NECK HEIGHT: 0.062 INCHES NOMINAL IN
SOCKET DEPTH: 0.500 INCHES NOMINAL IN
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
SPECIFICATION/STANDARD DATA: 80204-B16.5 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
FLANGE DIAMETER: 4.250 INCHES NOMINAL IN
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 1.000 INCHES IN
RAISED FACE HEIGHT: 0.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
NECK HEIGHT0.062 INCHES NOMINAL IN
SOCKET DEPTH0.500 INCHES NOMINAL IN
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
SPECIAL FEATURESFLANGES CONFORM TO ASA STANDARD B16.5
SPECIFICATION/STANDARD DATA80204-B16.5 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
FLANGE DIAMETER4.250 INCHES NOMINAL IN
NOMINAL PIPE SIZE FOR WHICH DESIGNED1.000 INCHES IN
RAISED FACE HEIGHT0.062 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
1381 1-1/2INInterchangeable
interchangeable cross-reference
interchangeable
ASTM A-105Interchangeable
interchangeable cross-reference
interchangeable
ANSI B16.11 1-1/2INInterchangeable
interchangeable cross-reference
interchangeable
R5828Interchangeable
interchangeable cross-reference
interchangeable
29512Interchangeable
interchangeable cross-reference
interchangeable
1938PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12-00-3727?
12-00-3727 is a THERMAL RELEASE,CIRCUIT BREAKER.
What parts can replace 12-00-3727?
There are 25 known substitutes for 12-00-3727: 1381 1-1/2IN, ASTM A-105, ANSI B16.11 1-1/2IN and 22 more. Substitute compatibility should be verified for your specific system.
Is 12-00-3727 still available?
12-00-3727 is currently cancelled.
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