Hastings 4.000" Standard Bore, Single Cylinder Ring Set with 5/64" Top Ring, 5/64" Second Ring and a First Oil Ring is 7/64".
This Hastings Single Cylinder Ring Set has a top ring manufactured from ductile iron 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 grey iron with a chrome ring surface treatment.

Application Summary:

Year Make/Model
1983-1987 Ford F-350
Attributes
1st Oil Groove 7/64
1st Oil Ring Material GREY IRON
1st Oil Ring Surface Treatment CHROME
2nd Groove 5/64
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 2D5697.S
California Proposition 65 No
Engborein 4.000
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 PLASMA MOLY
GTIN 00075538192114