316 Stainless Steel Disc .125″ Holes Meets 21CFR 177.2600 Buna – Rubber gaskets for general purpose industrial sealing at moderate temperatures (between -22° and 250°F) FKM – Rubber gaskets providing indefinite seal from 5° to 400°F, and an excellent seal at 600°F up to 48 hours Which gasket material is suitable for your application? Consult our Compound Selection Guide. Tri-Clamp Orifice Plate Gaskets are used to adjust flow rates, equalize backpressure and balance backflow during SIP procedures. Material Specs & Statements