HH/HHU Series Hoopster® Rings Internal Hoopster Retaining Rings are dicult to remove from the groove without a removal provision. We oer either a bent end for removal or no removal provision as shown to the left. Groove Diameter Width All dimensions in inches unless otherwise specified. Product Dimensions Stock Items available in carbon steel and 302 stainless steel. Ring Housing Diameter Outside Diameter Radial Wall Smalley Part Number 1, 2, 4 Use "HH" prefix for removal provision end. Use "HHU" prefix for no removal provision. Add sux “-S02” for 302 stainless steel. 3 Based on a groove material yield strength of 45,000 psi and a safety factor of 2. 4 See pages 134-135 for How to Order. 2