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Thread size of bolts is calculated by measuring the depth, width, and length of the threads. This helps to identify specific bolts and patterns.
These bolts are 12mm x 1.75 thread pitch. Im unsure of the length. I use 2.5 inch length for putting these engines on a engine stand
If you are wondering about the thread size, they are the same as the Lug Bolts. 12x125 MM.
How to calculate spanner size regarding bolts and nuts
M12-1.50
Bolts are categorised by their thread size. The standard socket size for a bolt with a three quarter inch thread is 1 and one eighth inches. Heavy head bolts use a one and a quarter inch socket.
9 mm by 1.25
The bolts that go from bell housing to block on a 5.7 (350 c.i.d.) are 3/8 bolts. standard thread with a 9/16 head. The bolts should be no shorter than 1 inch and no longer than 1 1/4 inch.
The lug nuts for the 1996 Volvo 850 are 65.8 mm in length, and the hex size is 19 mm. The thread size is M12 x 1.75. Some brands of lug nuts for this car are McGard and Dorman.
inch size bolts have the number of teeth in the length of 25.4mm length while in mm size bolts has the number of teeth on the 1mm length...so mm size(TPM) thread is more strengthen than inch(TPI) size bolts
The lug bolts on a 1996 VW Golf is a M14 x 1.5 thread, with a 17mm hex head.
Thread size is 9/16-18. Need a 7/8 socket for removing the lug nuts. Bolt pattern is 5 on 5.5"