M10 x 1.5 Locknut - for turbo / manifold

Locking Head Common 10mm exhaust Nut with 1.5mm thread pitch

Sold singly 

Ideal for Rover T16 manifold to head studs

You may also be interested in this/these product(s)

M8 x 1.25 stud - for turbo outlet (EACH) £2.00

M8 x 1.25 Locknut - for turbo outlet (EACH) £2.00

Rover T16 Exhaust Manifold Gasket (with metal fire rings) £15.50

M10 x 1.5 stud - for turbo outlet (EACH) £2.24