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CHAMPION AEROSPACE, INC. AVIATION CATALOG AV-14

RHB37E

12 Pack Shipping Wt.: 3 lbs. - 5 oz. (1.503 kg)
Thread size: 18mm
Reach: 1/2”/1.27cm
Shielded Threading: 3/4” - 20
Standard Electrode: Two Prong
Plug Gap: .016”-.021”/0.41-0.53mm

NOTE:
Spark plugs are shipped in factory sealed plastic cases. Opened spark plug cases make the spark plugs non-returnable. Please do not open any spark plug until you are sure you have received the correct spark plugs for your application.

SPARK PLUG P/N Description

1. Resistor
None - No Resistor
R - Mil-Spec. Resistor-Erosion protection

2. Barrel Style
None - Unshielded
E - Shielded 5/8"-24 Thread
H - Shielded 3/4"-20 Thread (All Weather Plug)
V - M18X1 - Metric

3. Mounting Thread - Reach - Hex Size
B - 18 mm - 13/16” (2.06 cm) - 7/8” (2.22 cm)
M - 18 mm - 1/2” (1.27 cm) - 7/8” (2.22 cm)
J - 14 mm - 3/8” (.095 cm) - 13/16” (2.06 cm)
L - 14 mm - 1/2” (1.27 cm) - 13/16” (2.06 cm)
U - 18 mm - 1-1/8” (2.85 cm) - 7/8” (2.22 cm)
N - 14 mm - 3/4” (1.90 cm) - 13/16” (2.06 cm)

4. Heat Rating Position
Low number - Cold (26)
High number - Hot (50)

5. Electrode Design
None - Conventional Single
E - Two Electrode Massive
N - Four Electrode Massive
S - Single Electrode (Iridium)
B - Twin Electrodes(Nickel)
R - Push-wire - 90° to Center
Y - Projected Core Nose
P - Two Electrode (Platinum)
W - Two Electrode (Iridium)