Metric high tensile, precision hexagon head bolts, screws and hexagon nuts.
ISO metric course pitch series threads 6g.
Property class 8.8 to Australian standards, bolts and screws
AS1110-2000 nuts AS 1112-200

Metric
Nominal Bolt Size	Pitch		Shank Dia		Width Across Flats		Head thickness		Nut Thickness
	Course	Fine	Max	Min	Max	Min	Max	Min	Max	Min
M6	1.00	0.75	6	5.82	10	9.78	4.15	3.85	5.2	4.90
M8	1.25	1.00	8	7.78	13	12.73	5.45	5.15	6.8	6.44
M10	1.50	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	10.80	10.37
M14	2.00	1.50	14	13.73	21	20.67	8.98	8.62	12.8	12.10
M16	2.00	1.50	16	15.73	24	23.67	10.18	9.82	14.8	14.01
M20	2.50	1.50	20	19.67	30	29.67	12.715	12.85	18.00	16.90
M24	3.00	2.00	24	23.67	36	35.38	15.215	14.785	21.50	20.20

Unified high tensile hexagon bolts, screws and hexagon nuts, inch series, UNC and UNF threads to Australian standard 2465-1999 grade 5 - grade 8 (equivalent to dimensions of ANSI B18.2.1)

Imperial
Nominal Bolt Size	Threads per inch		Shank Dia		Width Across Flats		Head thickness		Nut Thickness
	UNC	UNF	Max	Min	Max	Min	Max	Min	Max	Min
1/4	20	28	0.250	0.245	0.438	0.428	0.163	0.150	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	1.100	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

Information provided as a guide by Bremick Fasteners