Machine Design

Preload Indicating Washers

Preload indicating (PLI) washers are said to provide accurate measuring of the clamp force in a bolted joint, and work with joints that are inaccessible to torque wrenches.

Standard PLI washers are suitable for use under locknuts to induce an average preload of 80% of the yield strengths in bolts ranging from 80 to 260-ksi minimum ultimate tensile strength. Washer types include standard for use under the nut, under the head for small spaces, and oversize for use with reworked joints. Sizes range from #10 to 11/2 diameters in alloy steel, cadmium plated to QQ-P-416, and corrosion-resistant A286 material.

SPS Technologies
301 Highland Ave.
Jenkintown, PA 19046
(215) 572-3158
spstech.com/aero

Hide comments

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.
Publish