Bolt size - nut size

Bolt size	Socket size (MM)
5/8″	27
3/4″	32
7/8″	36
1″	41
1-1/8″	46
1-1/4″	50
1-3/8″	55
1-1/2″	60
1 5/8″	65
1-3/4″	70
1-7/8″	75
2″	80
2-1/4″	90
2-1/2″	100
2-3/4″	110
3″	120
3-1/4″	130
3-1/2″	140
3-3/4″	150
4″	160

Bolt size	Socket size (MM)	Allan socket size (MM)
M16	24	14
M18	27	14
M20	32	17
M22	32	17
M24	36	19
M27	41	19
M30	46	22
M33	50	24
M36	55	27
M39	60	30
M42	65	32
M48	75	36
M52	80	36
M56	85	41
M60	90	46
M64	95	46
M68	100	50
M72	105	55
M76	110	60
M80	115
M90	130
M100	145

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