Hastings 3.9375" Standard Bore, 8-Cylinder Ring Set with 5/64" Top Ring, 5/64" Second Ring and a First Oil Ring is 3/16".
This Hastings 8-Cylinder Ring Set has a top ring manufactured from grey iron with phosphate 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
1956 Chrysler 300
1956 Chrysler Imperial
1956 Chrysler New Yorker
1956 Chrysler Newport
1957-1958 Chrysler Saratoga
1956 Chrysler St Regis
1956 Chrysler Town & Country
1957-1958 Chrysler Windsor
1957 Dodge Royal
1957 Dodge Sierra
1956-1957 GMC Truck
1955 Lincoln Capri
1955 Lincoln Custom
1964 Oldsmobile 442
1964 Oldsmobile Cutlass
1967 Oldsmobile F85
1964-1966 Oldsmobile Jetstar 88
1964-1967 Oldsmobile Vista Cruiser
1957 Pontiac Bonneville
1956-1957 Pontiac Catalina
1956-1957 Pontiac Chieftain
1956-1957 Pontiac Star Chief
1957 Pontiac Super Chief
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 636
California Proposition 65 No
Engborein 3.9375
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 5/64
Top Ring Surface Treatment PHOSPHATE
GTIN 00075538028352