Autolite URHM38E Massive Electrode Aviation Spark Plugs

Autolite Massive Electrode Aviation Spark Plugs

OEMs and overhaul facilities around the world are specifying massive electrode Autolite Aviation Spark Plugs for their performance, heat transfer, leakage protection, advanced reliability, long life, and cost-effectiveness.

Completely FAA-PMA approved, these plugs are trusted for use in some of aviation's most demanding applications, including the Extra 300 aircraft flown by the Northern Lights Aerobatic Team and the Exxon Flyin' Tiger climb machine.

Features:

• High-conductivity copper core electrode is co-extruded inside a special nickel alloy for optimum heat transfer and resistance to combustion gases.
• Vacuum-cemented center electrode for better heat transfer from the center electrode to the insulator, which helps reduce fouling.
• High-alumina ceramic insulator is enhanced with a proprietary protective glaze material for high mechanical strength and superior dielectric quality needed to survive the severe engine environment.
• Bright nickel plating provides corrosion protection.
• Hot-lock assembly procedure resists the high pressure of combustion gases, and creates a leakproof sealing force between the insulator and outer shell.
• Proprietary glass center seal and integral resistor bonds the insulator, center electrode, and terminal into a single, leakproof structure for maximum durability, electrical conductivity and improved spark gap life.
• Non-screw head electrode offers a consistent contact surface for excellent harness-to-spark plug termination and energy transfer.

Specifications:

Unison / Autolite Part # Mounting Thread Size Reach Shielding Thread Gap (Current Autolite Gap) UREM38E 18mm 1/2" 5/8" - 24 .016" - .021" URHM38E 18mm 1/2" 3/4" - 20 .016" - .021" UREM40E 18mm 1/2" 5/8" - 24 .016" - .021" URHM40E 18mm 1/2" 3/4" - 20 .016" - .021" URHB32E 18mm 13/16" 3/4" - 20 .016" - .021" UREB37E 18mm 13/16" 5/8" - 24 .016" - .021" URHB37E 18mm 13/16" 3/4" - 20 .016" - .021" UREM37BY 2 18mm 1/2" 5/8" - 24 .016" - .021" Cross Reference:  (depends upon application) Unison / Autolite Part # Bendix Autolite Part # (pre 1980s) Champion Part # Auburn Part # UREM38E SH26 REM38E SR-86 URHM38E SH260 RHM38E HSR-86,-87 UREM40E SH20A REM40E SR-87,-88 URHM40E SH200A RHM40E HSR-87,-88 URHB32E SL350 RHB32E 273 UREB37E SL30A REB37E 171 URHB37E SL300A RHB37E 271 UREM37BY 2 - REM37BY - 2 UREM37BY is a projected gap design