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Simpson Strong-Tie 3/8" Expansion Screw Anchor

Brand: Simpson Strong-Tie Mfg#: ESA37
Product#: 137ESA37
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The ESA was the original internally threaded mechanical anchor design. The malleable lead shield allows for secure mounting.


  • One piloted setting punch is included in each box
  • The minimum concrete thickness is 1-1/2 times the embedment depth
  • Machine bolt is not included
  • The allowable loads listed are based on a safety factor of 40


  • Brand: Simpson Strong-Tie
  • Thread Size: 0.375-16
  • Standards: Federal A-A-1922A, Type 1
  • Minimum Embedment Depth: 1.25 in
  • Type: Internally Threaded
  • Ultimate Tension: 1520 lb
  • Material: Antimonial Lead
  • Drill Bit Size: .75 in
  • Length: 1.25 in
  • Special Features: Die Cast Zamac 3 Alloy Cone
  • Usage: Use with Light Duty Concrete, Block, Brick and Stone