Bolts Nuts and Screws Online

Bolts Standard Australia

Nominal Bolt Size	Pitch		Shank Diameter		Width Across Flats		Head Thickness		Nut Thickness
Nominal Bolt Size	Course	Fine	Max	Min	Max	Min	Max	Min	Max	Min
M6	1	0.75	6	5.82	10	9.78	4.15	3.85	5.2	4.9
M8	1.25	1	8	7.78	13	12.73	5.45	5.15	6.8	6.44
M10	1.5	1.25	10	9.78	16	15.73	6.58	6.22	8.4	8.04
M12	1.75	1.25	12	11.73	18	17.73	7.68	7.32	10.8	10.37
M14	2	1.5	14	13.73	21	20.67	8.98	8.62	12.8	12.1
M16	2	1.5	16	15.73	24	23.67	10.18	9.82	14.8	14.01
M20	2.5	1.5	20	19.67	30	29.67	12.715	12.85	18	16.9
M24	3	2	24	23.67	36	35.38	15.215	14.785	21.5	20.2

Nominal Bolt Size	Threads per Inch		Shank Diameter		Width Across Flats		Head Thickness		Nut Thickness
Nominal Bolt Size	UNC	UNF	Max	Min	Max	Min	Max	Min	Max	Min
1/4	20	28	0.25	0.245	0.438	0.428	0.163	0.15	0.226	0.212
5/16	18	24	0.3125	0.3065	0.500	0.489	0.211	0.195	0.273	0.258
3/8	16	24	0.375	0.369	0.562	0.551	0.243	0.226	0.337	0.320
7/16	14	20	0.4375	0.4305	0.625	0.612	0.291	0.272	0.385	0.365
1/2	13	20	0.500	0.493	0.750	0.736	0.323	0.302	0.448	0.427
5/8	11	18	0.625	0.617	0.938	0.922	0.403	0.378	0.559	0.535
3/4	10	16	0.750	0.741	1.125	1.112	0.483	0.455	0.665	0.617
7/8	9	14	0.875	0.866	1.312	1.285	0.563	0.531	0.776	0.724
1	8	14	1.000	0.990	1.500	1.469	0.627	0.591	0.887	0.831