Various other keying means could be used to affix {TAIL ~ the disc} 51 to {HEAD ~ the shaft} 
Various other keying means could be used to affix { TAIL ~ the disc } 51 to { HEAD ~ the shaft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD