AALL AMERICAN Fasteners offers a wide variety of locking or anti-loosening fasteners suitable for a multitude of applications. While the term “locking” does not mean permanently secured, these fasteners do demonstrate anti-loosening properties.  In many fasteners, the locking function is inherent to the design while others are modified physically or by applying compounds to achieve a more secure joint.

Free Spinning Locking Fasteners

  • Lock Bolts
    • Place Bolts
    • SEMS Screw (Bolt)
    • Serrated Flange Bolts
  • Lock nuts
    • Hex
      • Conduit
      • Cone
      • Serrated Flange
    • Flex Type
    • K Lock (Keps) – External / Internal Tooth
    • Nylon Insert
    • Prevailing Torque
    • Reversible     
    • Top
  • Lock Washers
    • Combination External / Internal Tooth
    • Disc Washer
    • External Tooth
    • Internal Tooth
    • Split Lock
    • Wave Spring

Fastener Locking Modifications

Another method of increasing resistance to loosening involves modifying the fastener.  Common practices include drilling holes or embedding a nylon type material in the fastener.

Achieving anti-loosening properties by drilling involves drilling horizontal holes across a fastening device.  Typically these holes are drilled through the head, shank, threads or corners and allow for safety wire to run through the hole.  Safety wire is secured to a stationary component limiting movement of the fastener.  Holes drilled across the shank accommodate cotter pins for castellated or slotted nuts in addition to wires.  Both provide a quick visual check to ensure the fastener has not come loose due to vibration.

Embedding a nylon type material in a fastener requires machining a hole or strip into the threaded portion of the fastener.  This hole or strip accommodates a plug or bar of nylon type material that fills the threads of the mating material when tightened.  The material creates a greater resistance against the mating material thereby creating a more securely fastened joint.  The industry refers to this as a nylon pellet or nylon strip.

Locking Compounds

AALL AMERICAN Fasteners offers a full range of common and brand name locking or sealing compounds such as Loctite®, Vibratite®, Nylock® and 3M Scotch Grip®.  There are factory applied compounds or compounds sold for application at the time of installation.  When selecting a locking or sealing compound, give consideration to the application material, the temperature range of the application and any exposure to liquids, gases or chemicals.  

Please contact our Certified Fastener Specialists to review your requirements at 877-791-4426 or send your Request For Quote to us directly.
Back to top
AALL AMERICAN Fasteners now offers online purchasing:  Fittings, Valves, Hose Clamps & Accessories.

Click here for Made in America Fittings.