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P I S T O N R I N G T Y P E S

Top and Compression Rings

R

Rectangular ring

ET

Half keystone ring

M

Taper - faced ring

T

Keystone ring

N

Napier ring

NM

Taper - faced napier ring

DSF

Coil Spring loaded bevelled edge oil control ring

D

Bevelled edge oil control ring

3S

Multi - piece steel - rail oil control ring

Oil Control Rings

Ring Coatings

Cr

Periphery crome - plated

Mo

Periphery molybdenum plated

P

Phosphated

Nit

Nitrided

Fe

Ferroxided

IV