Self-Locking Place Bolts

/Place Bolts
Place Bolts 2017-05-26T12:18:37+00:00

Is Vibration Costing you Money?

Vibration causes fasteners to loosen over time. Every time you have to check and re-tighten your bolts, you’re losing money. Our self-locking place bolts resist vibrational loosening up to 7 times better than conventional hex head cap screws.

These self-locking, free-spinning bolts most often appear in military (MS35764) and commercial engineering standards for applications like flywheels, cylinder heads, ring gears, flex plates, compressor mountings, and transmission covers. Our place bolts can also be found on oil rig mud pumps. Place bolts are ideal for any application where vibration threatens to loosen traditional bolts or screws.

Asymmetric place bolts are available in two series: Type B and Type BH.

These all metal lock bolts have five varying width slots and a recess cold-formed in the hexagon head to provide diaphragm self-locking action. Asymmetric place bolts are made in standard customary and metric sizes and can be manufactured to specific customer blueprints or specifications such as MS35764. We also manufacture the obsolete type ‘AA’ six slot place bolts upon request.

Our place bolts are:

  • Cold Formed
  • One Piece
  • All Metal
  • Self Locking
  • Free Spinning
  • Reusable

Contact us, and we can help make vibrational loosening and its costly maintenance one less thing for you to worry about.



Type B

Conventional hexagon size


Type BH

Next larger head size for stronger locking action

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