Hastings 3.953"/100.40 mm Bore +.030" Over Size, Single Cylinder Ring Set with 1.60 mm Top Ring, 1.75 mm Second Ring and a First Oil Ring is 3.50 mm.
This Hastings Single 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
1990-1997 Ford Aerostar
1991-2004 Ford Explorer
2001-2003 Ford Explorer Sport
2001-2004 Ford Explorer Sport Trac
1990-2004 Ford Ranger
1994-1998 Mazda B4000
2000 Mazda B4000
1991-1994 Mazda Navajo
1998-2004 Mercury Mountaineer
Attributes
1st Oil Groove 3.50
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1.75
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 4627S.030
California Proposition 65 No
Engborein 3.953
Engboremetric 100.40
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1.60
Top Ring Surface Treatment PHOSPHATE
GTIN 00075538161462