hardware retaining rings
proto 577 rr07523 . 75 inch drive retaining ring 1 . 44 inch groove
this action pinches the small fin or the crush gauge on these retaining rings they are nottended to bear any load the rotational forces are between the drive tool and the socket the resin crush gauge on the pin helpsdicate when a socket is excessively worn and should be drive size 3 4 type socket parts and accessories groove diam 1 7 16 type o ring sku orsno64793
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