Speedometer-tachometer d adapter (NSN 6680-01-182-1280)
Special Features
Bsteel alloy 4140, 4142, 8648 or 1137 to 1141; quench and temper to rockwell hardness c30-c37; cadmium plating type 2, class 3 per astm qq-p-416; alternate zinc coating class fe/zn type 2, per astm b633
