Machine Design
In cross or regular lay ropes

Direction of twist of wires and strands are same
Wires in two adjacent strands are twisted in opposite direction
Direction of twist of wires in strands is opposite to the direction of twist of strands
Wires are not twisted

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Machine Design
Cap screws are

Provided with detachable caps
Used to prevent relative motion between parts
Slotted for a screw driver and generally used with a nut
Similar to small size tap bolts except that a greater variety of shapes of heads are available

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