"TENAX" HOOD/TONNEAU COVER SNAP BUTTON Head : 4.60mm, Foot thread 0-3/16oUNF (4.7mm), 8mm spannerSprite & Midget from 1958 to 1980TR2, TR3 and TR3A from 1953 to 1962Austin-Healey from 1959 to 1967 BT7-BJ8