Design News is part of the Informa Markets Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Self-locking fastener

Self-locking fastener

A-Lock uses the shallow angle of two inclines for locking and requires no tools or extra parts.

Unlike other fasteners that require lock washers and nylon patches, a new patented vibration-resistant fastener uses isometric threads rather than the symmetric threads more typical of common nuts and bolts. Called A-Lock, the patented fastener self-locks when the nut encounters resistance.

This two-piece unit uses the wedging action of the thread's shallow inclines for self-locking. The nut turns freely until it contacts the clamping parts. Then additional turns engage the nut's shallow flanks with those on the bolt, wedging them into a locked position. Radial force acting on the inclines is greater than axial force, which achieves the clamping action.

Tad Stanizewski, Shap Inc., 32 Canterbury Lane, Hackettstown, NJ 07840; Tel: (908) 684-4025; Fax: (908) 684-4027.

For more information, Enter 510

Submit your ideas and rough drawings for this section to John Lewis, Designer's Corner, Design News, 275 Washington St., Newton, MA 02458

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.