Chrome screw 1/4" UNF x 1" raised countersunk,

Suits:

Windscreen - 100-6 & 3000 (BN4, BN6, BN7 & BT7) (1956-62)
Door Handles & Locks - Mini MkI-II (1959-70)
Grommets & Seals - MGB & MGB GT (1962-80)
External Gearbox: 4 Synchro - MGB & MGB GT (1967-80