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sean logie	16/12/2016 16:34:21
608 forum posts 7 photos	A bolt broke that's used for carriage lock and I'm trying to order one and I'm crap at identifying whitworth bolts and I would appreciate a lesson in identifying whitworth bolts. The bolt measures .298" in diameter, it has a 18tpi thread ,what size is it please . A frustrated Sean 😎
Raymond Anderson	16/12/2016 16:39:30
785 forum posts 152 photos	If it is BSW then the nearest is 5/16 x 18 , the Ø for that is 0.3125.
Roger Provins 2	16/12/2016 16:40:40
344 forum posts	The only 18 tpi whitworth I can see on the chart is 5/16"
sean logie	16/12/2016 17:12:45
608 forum posts 7 photos	Posted by Roger Provins 2 on 16/12/2016 16:40:40: The only 18 tpi whitworth I can see on the chart is 5/16" Have you a link for the chart your reading from . Sean
Thor 🇳🇴	16/12/2016 17:34:23
1766 forum posts 46 photos	Hi Sean, May be this link can be of use? You can access other thread form charts from that web page. Thor Edited By Thor on 16/12/2016 17:34:35
Chris Evans 6	16/12/2016 18:18:02
2156 forum posts	A Zeus book is an essential in any workshop. Think my last one cost around £6 it was the third one in over 50 years, the others fell apart with use.
sean logie	16/12/2016 18:48:05
608 forum posts 7 photos	Thanks all Sean

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