What size are the threads ? I'm looking for M8:1 at the top and M10:1 at the tip

These are 11/32 fine thread. You need metric course thread.

This looks like the thermocouple i just took out of my lennox hearth products shoreline model srh 40 but it is not listed on your compatablity list?

It should be a good replacement.

Will this work on a superior ssdvr-3530cnm?

Yes, this is the thermocouple for that unit.

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🔥 Upgrade your fireplace game with precision and power!

DURABLE BUILD - Crafted by Lennox with a limited warranty for peace of mind
TRUSTED REPLACEMENT - 90-day replacement warranty keeps your fireplace running flawlessly
RELIABLE HEAT CONTROL - Ensures consistent 2000W warmth for cozy indoor comfort
SEAMLESS INSTALLATION - Freestanding design with smooth finish fits classic fireplaces effortlessly
FUEL POWERED EFFICIENCY - Operates without batteries, powered directly by your gas supply

The Lennox 74L57 Gas Fireplace Thermocouple is a high-quality, fuel-powered replacement part designed for classic indoor gas fireplaces. Delivering 2000 watts of heat output, it features a smooth finish and freestanding installation. Backed by a limited warranty and a 90-day replacement guarantee, this precision thermocouple ensures reliable and efficient fireplace operation without the need for batteries.

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Good experience, but the tracking updates could be better.

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Brand	Lenox
Power Source	Fuel Powered
Finish Type	Smooth
Installation Type	Freestanding
Heat Output	2000 Watts
Style	Classic
Ventilation Type	External Venting
Specific Uses For Product	Indoor
Item Weight	0.01 Ounces
Model Name	Lennox Gas SIT Thermocouple
Warranty Type	Limited
Burner type	Gas
UPC	733353710424
Manufacturer	Lennox
Part Number	3710424
Item Weight	0.01 ounces
Product Dimensions	8 x 1 x 6 inches
Item model number	74L57
Is Discontinued By Manufacturer	No
Finish	Smooth
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

Lennox 74L57 Gas Fireplace Thermocouple

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