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M19646C124D315 — Technical Data Sheet

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MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M · COMPONENT
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

THERMOMETER,INDICATING,CAPILLARY. Key specifications include MATERIAL: STEEL CORROSION RESISTING OVERALL, BULB TYPE: FLEXIBLE CAPILLARY, BULB STYLE: PLAIN BULB W/BENDABLE EXTENSION, SCALE TYPE: DIAL, CASE DIAMETER: 4.000 INCHES NOMINAL IN, DIAL DIAMETER: 3.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 6685-01-481-2073, 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
M19646C124D315
NSN: 6685-01-481-2073
FSC: 6685
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
MATERIALSTEEL CORROSION RESISTING OVERALL
BULB TYPEFLEXIBLE CAPILLARY
BULB STYLEPLAIN BULB W/BENDABLE EXTENSION
SCALE TYPEDIAL
BULB QUANTITY1
CASE DIAMETER4.000 INCHES NOMINAL IN
DIAL DIAMETER3.500 INCHES NOMINAL IN
BULB TIP LENGTH1.500 INCHES NOMINAL IN
ACTUATING MEDIUMLIQUID
SPECIAL FEATURESSURFACE MOUNTING; TEMP PLUS 20 DEGREES F TO PLUS 240 DEGREES F; YELLOW DIAL; UNION CONNECTION 0.750 INCH IN
STYLE DESIGNATORBULB W/O SOCKET
BULB OVERALL LENGTH181.500 INCHES NOMINAL IN
NSN6685-01-481-2073
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M THERMOMETER,INDICATING,CAPILLARY TITLE COMPONENT PN M19646C124D315 MFR MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M THERMOMETER,INDICATING
KEY FEATURES
•
BULB STYLE: PLAIN BULB W/BENDABLE EXTENSION
•
SCALE TYPE: DIAL
•
BULB TYPE: FLEXIBLE CAPILLARY
•
BULB OVERALL LENGTH: 181.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BULB W/O SOCKET
•
DIAL DIAMETER: 3.500 INCHES NOMINAL IN
•
BULB CONNECTION TYPE: UNION
•
EXTENSION NECK LENGTH: 180.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BULB STYLEPLAIN BULB W/BENDABLE EXTENSION
SCALE TYPEDIAL
BULB TYPEFLEXIBLE CAPILLARY
BULB OVERALL LENGTH181.500 INCHES NOMINAL IN
STYLE DESIGNATORBULB W/O SOCKET
DIAL DIAMETER3.500 INCHES NOMINAL IN
BULB CONNECTION TYPEUNION
EXTENSION NECK LENGTH180.000 INCHES NOMINAL IN
CASE DIAMETER4.000 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
M27-400InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
81GNN00RW75YInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
81GN-N00U-W40YInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-T-19646InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
81GK-Y00R-W25YInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
41GH-Y00U-A10YInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M19646C124D315?
M19646C124D315 is a THERMOMETER,INDICATING,CAPILLARY manufactured by MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M.
What parts can replace M19646C124D315?
There are 21 known substitutes for M19646C124D315: M27-400, 81GNN00RW75Y, 81GN-N00U-W40Y and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M19646C124D315?
M19646C124D315 is cataloged in the Federal Logistics Information System under NSN 6685-01-481-2073. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026