These washers made of heat-resistant Mylar(TM) can be used instead of high pressure silicone grease in ultrasonic stack joints. High pressure silicone grease probably does the best job of "wetting" the surfaces for good coupling and low acoustic losses, but it is much harder to train somebody to apply the grease correctly than it is to use a fresh washer each time the tooling is assembled. Also, silicone can interfere with decorating operations such as printing or painting, and is therefore banned from some plants. To select the correct washer, measure the stud diameter and use the next larger ID, then measure the diameter (or diagonal) of the faces in contact, and use the next larger OD. If your OD is larger than the 46 mm, use 46 mm OD. IMPORTANT: Use a new washer each time the tooling is reassembled. Do not use both grease and a washer in the same joint. Washers come 35 to a pack. Order the number of packs you want, not the number of washers. Availability: Usually ships the next business day. PW35US$13.50Size: ID 8 mm, OD 25 mm (40kHz, 1 in OD)ID 9.7 mm, OD 38 mm (3/8 in ID, 1.5 in OD)ID 9.7 mm, OD 46 mm (3/8 in ID, 2.0 in OD)ID 13 mm, OD 38 mm (1/2 in ID, 1.5 in OD)ID 13 mm, OD 46 mm (1/2 in ID, 2.0 in OD) Could you do us a favor? If you want something and we don't have it on the site, like a replacement for a 502 or 802 converter or 200- or 400/800-style booster, please let us know by email. Thanks! Recent customer comment: "This was my first time using Tributek, finding what I was looking for was very easy, ordering was also easy. Customer Service did a great job letting me know that everything was being done to satisfy the customer and that the order was processed and being shipped to my location. I will definitely use this company in the future." All prices are EX WORKS (Incoterms 2000). Shipping to Argentina, Australia, Austria, Belgium, Bolivia, Brazil, Canada, Chile, China, Czech Republic, Denmark, Ecuador, Finland, France, Germany, Gibraltar, Greece, Guatemala, Hong Kong, India, Indonesia, Ireland, Italy, Japan, Luxembourg, Mexico, Netherlands, New Zealand, Nigeria, Norway, Paraguay, Peru, Poland, Portugal, Singapore, South Africa, Sweden, Switzerland, Taiwan, UK, and US and US Territories and Posessions only. Orders shipped to Illinois addresses will have Illinois sales tax added to taxable items. Paper warranty statement shipped with product supersedes any warranty statements made on web site. USA phone/fax 877-768-3892 www.tributek.biz - PO Box 8025 - Elburn IL 60119 USA All content is copyright (c) 2006-2010 www.tributek.biz division of www.tributek.com All rights reserved. Last updated 1 June 2010