Champion Spark Plug Lot of 12 P/N: RHB37N New Old Stock RHB37E (19590)

Vendor: Champion
Box of 12
New Old Stock
Champion Spark Plugs
 Part Number: RHB37N
The direct replacement is  RHB37E
Shielded 5/8"-24 thread
18mm mounting thread
13/16" reach
7/8" hex size
Still sealed in the plastic cases
We have checked with our personal Champion representative, and these plugs have no shelf life.
Fits these engines according to the Champion Catalog:
Lycoming
 AEIO-320-E, IO-320-C, -F, LIO-320-C (Long Reach), IO-360-A, IO-360-C1F, IO-360-F (Long Reach), IVO-360, TIO-360-A, -B, AEIO-360-A (Long Reach), TO-360-A1A6D, TO-360-C1A6D, TO-360-E, TO-360-F1A6D, LTO-360-A1A6D, LTO-360-E, VO-435-A, -B (Long Reach), TVO-435-A, -B, -C, -D, -E, -F, -G (Long Reach), O-435-23-25, GO-480-G1, G2 (Long Reach), GSO-480-A, -B (Long Reach), IGSO-480-A (Long Reach) IGO-480-A, O-480-1-3, IO-540-AA, -E, -G, -J, -K, -M, -P, -R, -S, -U, O-540-L3C5D, M1B5D (Long Reach), O-540-9, VO-540-Series, IVO-540 Series (Long Reach), IGO-540-A, -B (Long Reach), TIO-540-A, -C, -E, -F, -G, -H, -J, -K, -N, -R, -S, -T, IGO-540-A, -B, LTIO-540-F, -J, -N, -R, TIO-541-A, -E, TIGO-541-A, -E, IO-580-A, IO-720-A, -B, -C, -D (Long Reach)
Teledyne Continental
R9A
Allison
V1710
Franklin
6AS-335-A, B, 6AS-350-A, -A1, 6V335-A1A, A1B, 6VS-335-A, -B
Pratt & Whitney
R-1830 (Twin Wasp C), R-2000 (Twin Wasp D), R-2800 (Double Wasp) R-2800-97, CA3, CA5, CA15, CA17, CA18, CA19, R-4360 (Wasp Major)
Pezetel
(WSK) ASZ-621R, (1000 h. p.), P2L-3S (600 h. p.)
Wright
Whirlwind R-760, R-975 (18mm 13/16” Rch.), Cyclone R-1300, Cyclone R-1820 Series (Except F & HE), Cyclone R-2600 Series, Cyclone R-3350, C18BA, C18BD
The box has a hole in the side.