المكون الخارجي للمحمل الكروي أو الأسطواني والذي يوفر سطح اتصال للعناصر المتدحرجة للمحمل المضاد للاحتكاك.
one face extends down to form lip,od chamfered 3/64 in. min,to 1/16 in. max,by 45 deg on small face side special features, steel overall material, 2.0260 inches minimum and 2.0270 inches maximum overall outside diameter, 0.3494 inches minimum and 0.3594 inches maximum overall width, 1.2500 inches minimum and 1.2580 inches maximum largest bore diameter