Hastings 2.900" Bore +.060" Over Size, Single Cylinder Ring Set with 1/16" Top Ring, 1/16" Second Ring and a First Oil Ring is 5/32".
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
1967-1968 Triumph Spitfire
1975-1980 Triumph Spitfire
Attributes
1st Oil Groove 5/32
1st Oil Ring Material STEEL RAIL/STAINLESS EXP
2nd Groove 1/16
2nd Ring Surface Treatment PHOSPHATE
Alternate Part Number 6840S.060
California Proposition 65 No
Engborein 2.900
Hazardous Material Code N
Life Cycle Status Code Available to Order
NAFTA Preference Criterion Code B
SDR Required Flag N
Top Groove 1/16
Top Ring Surface Treatment PHOSPHATE
GTIN 00075538060420