Hastings 3.870" Bore +.040" Over Size, Single 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 does not specify Ring Material or Ring Surface Treatment

Application Summary:

Year Make/Model
1968-1969 Oldsmobile 442
1968 Oldsmobile Cutlass
1968-1969 Oldsmobile Vista Cruiser
Attributes
1st Oil Groove 3/16
2nd Groove 5/64
Alternate Part Number 698S.040
California Proposition 65 No
Engborein 3.870
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 5/64
GTIN 00075538045250