Flex-Loc 20FA-518

5/16-18 UNC Grade 2 Heavy Hex Lock Nut with Expanding Flex Top

Flex-Loc 20FA-813

1/2-13 UNC Grade 2 Heavy Hex Lock Nut with Expanding Flex Top

Flex-Loc 20FAC-420

1/4-20 UNC Grade 2 Heavy Hex Lock Nut with Expanding Flex Top

Flex-Loc 20FAF-813

Hex Lock Nut: Expanding Flex Top, 1/2-13, Grade 2 Steel, Uncoated