Thin or Jam Nuts are designed with approximately half the thickness of a standard hex nut. Their primary function is to act as a locking nut by being tightened against a standard nut to lock the pair in place. This double-nut method prevents self-loosening caused by vibration or movement. Apart from locking applications, thin nuts are also used in assembly conditions with limited space, where a full-size nut cannot be accommodated. Available in various finishes and materials, jam nuts are highly versatile for both heavy-duty and light applications.