Notice About Bundle Packs:Please understand our bundle packs share from a communal inventory. A buyout of one pack type will consume inventory of other packs. Due to limitations, our system has a delay in updating other pack stock quantities. Thank you graciously for understanding. Bolted double pin high pressure clamps are a significant upgrade from the standard clamp, with the ability to withstand twice the pressure of comparable sized single or double hinged clamps. High pressure bolted clamps are available in stainless steel SS304, with sizes ranging from 3/4 inch up to 12 inches. Larger sizes are available by special order. Intended for Tri Clamp fitting connection, high pressure clamps are commonly used in situations where temperatures fluctuate and PTFE gaskets are installed. Glacier Tanks recommends that all high pressure clamps be tightened as per the table under "Specificiations" to apply proper pressure and ensure a solid, leak free seal. However, over tightening a high pressure clamp may cause the gasket to fail from over-compression and place too much tension on the clamp threads. Learn more about clamp sizing & gaskets in our Tri Clamp Sizing Guide.