In this annular space section, the pin is provided with a groove which is tapered such that {HEAD ~ the diameter} of {TAIL ~ the pin} increases towards its open side 
In this annular space section , the pin is provided with a groove which is tapered such that { HEAD ~ the diameter } of { TAIL ~ the pin } increases towards its open side
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH