Sanitary External Hose Crimp Collar -Extra Length Westco Fitting 304 stainless, meets all 3A requirements. Westco fittings are designed to interlock with Westco tri clamp fittings to provide the extra holding strength needed in today’s food and brewing operations. These Westco fittings are 30% longer than the industry standard. These fittings are for use on hoses with thick rubber walls that can cold flow after hard use. The extra length gives you the extra hold.