Hastings 4.000" Bore +.010" Over Size, 8-Cylinder Ring Set with 5/64" Top Ring, 5/64" Second Ring and a First Oil Ring is 3/16".
This Hastings Single Cylinder Ring Set has a top ring manufactured from steel with plasma moly ring surface treatment, a second ring manufactured from grey iron with phosphate ring surface treatment. The 1st oil control ring is manufactured of steel rail/stainless expansion with a chrome rail ring surface treatment.

Application Summary:

Year Make/Model
1960-1966 American Motors Ambassador
1965-1966 American Motors Classic
1965-1966 American Motors Marlin
1966 American Motors Rebel
1954-1956 Buick Century
1977-1979 Buick Century
1977-1979 Buick LeSabre
1977 Buick Regal
1979 Buick Regal
1953-1956 Buick Roadmaster
1954 Buick Skylark
1977-1979 Buick Skylark
1956 Buick Special
1953-1956 Buick Super
1956-1957 Cadillac Commercial Chassis
1959-1963 Cadillac Commercial Chassis
1957 Cadillac DeVille
1959-1963 Cadillac DeVille
1957 Cadillac Eldorado
1959-1963 Cadillac Eldorado
1956-1957 Cadillac Series 60 Fleetwood
1959-1963 Cadillac Series 60 Fleetwood
1956-1957 Cadillac Series 62
1959-1963 Cadillac Series 62
1956-1957 Cadillac Series 75 Fleetwood
1959-1963 Cadillac Series 75 Fleetwood
1962-1975 Chevrolet Bel Air
1962-1972 Chevrolet Biscayne
1969-1974 Chevrolet Blazer
1987-1994 Chevrolet Blazer
1969-1972 Chevrolet Brookwood
1975-1986 Chevrolet C10
1966-1974 Chevrolet C10 Pickup
1967-1986 Chevrolet C10 Suburban
1988-1995 Chevrolet C1500
1992-1995 Chevrolet C1500 Suburban
1975-1987 Chevrolet C20
1966-1974 Chevrolet C20 Pickup
1967-1986 Chevrolet C20 Suburban
1988-1995 Chevrolet C2500
1992-1995 Chevrolet C2500 Suburban
1975-1986 Chevrolet C30
1966-1974 Chevrolet C30 Pickup
1988-1995 Chevrolet C3500
1967-1981 Chevrolet Camaro
1987-1990 Chevrolet Camaro
1966-1980 Chevrolet Caprice
1985-1988 Chevrolet Caprice
1964-1973 Chevrolet Chevelle
1965-1968 Chevrolet Chevy II
1962-1981 Chevrolet Corvette
1985-1990 Chevrolet Corvette
1964-1979 Chevrolet El Camino
1969-1970 Chevrolet Estate
1975-1993 Chevrolet G10
1975-1995 Chevrolet G20
1975-1995 Chevrolet G30
1962-1985 Chevrolet Impala
1975-1986 Chevrolet K10
1966-1974 Chevrolet K10 Pickup
1967-1986 Chevrolet K10 Suburban
1988-1995 Chevrolet K1500
1992-1995 Chevrolet K1500 Suburban
1975-1986 Chevrolet K20
1966-1974 Chevrolet K20 Pickup
1967-1986 Chevrolet K20 Suburban
1988-1995 Chevrolet K2500
Attributes
1st Oil Groove 3/16
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 5/64
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2M139S.010
California Proposition 65 No
Engborein 4.000
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
Notes W/Deep Oil Grv.
SDR Required Flag N
Top Groove 5/64
Top Ring Surface Treatment PLASMA MOLY
GTIN 00075538020592