This is for 5 x brass nuts suitable for inlet and exhaust manifolds on various classic cars. These are 5/16" UNF.
5 x Brass Manifold Nuts 3/8 UNF Exhaust Inlet MG VW Mini Triumph
10 X BRASS MANIFOLD EXHAUST M10 NUTS 10MM NUT 1.25 BN9
5 X TR415 BRASS TUBELESS RUBBER CAR VALVES FOR LANDROVER TRACTOR 4X4 VW BEETLE
M10 X 1.5 X 46MM Exhaust Manifold Stud With Copper Flashed Nut Honda (S43)
MGB Roadster/ MGB GT/ Midget Brass Manifold Nut set - GHF261K
OEQ Intake Inlet Manifold & Swirl Flaps BMW 1 2 3 4 5 X Series N47 11617807991