My plans mention that my anchor bolts sleeves need to be manufactured by Sinco, Inc. or Sinco Products, Inc. or an approved equal. I have never heard of this company. Who is Sinco?

Sinco, Inc., also known as Sinco Products, Inc., was a construction products company that manufactured plastic anchor bolt sleeves, among other products, many years ago.  Roughly in the year 2000 the company stopped manufacturing anchor sleeves and now appears to be out of business, renamed, or purchased by another company.  When Portland Bolt sees a specification asking for a Sinco plastic anchor sleeve we know that this is an outdated requirement and we immediately substitute Wilson Anchor Bolt Sleeves or a Contec Sleeve, since Sinco branded sleeves are no longer manufactured or available.