Guide 09 · Fastener Reference Guide

High Tensile Bolts

ISO metric precision hex bolts and set screws — dimensions and properties.

Text version — searchable and screen-reader friendly

Bolts Set Screws AS 1110.1

Diameter mm	Pitch mm	af	af	ac	ac	h	h	ds	ds	t	t	t
		Min	Max	Min	Min	Max	Min	Max	L ≤ 125	125 < L ≤ 200	L > 200
M4	0.70	6.78	7.00	7.66	2.68	2.92	3.82	4.00	14	20	33	7
M5	0.80	7.78	8.00	8.79	3.35	3.65	4.82	5.00	16	22	35	8
M6	1.00	9.78	10.00	11.05	3.85	4.15	5.82	6.00	18	24	37	10
M8	1.25	12.73	13.00	14.38	5.15	5.45	7.78	8.00	22	28	41	13
M10	1.50	15.73	16.00	17.77	6.22	6.58	9.78	10.00	26	32	45	16
M12	1.75	17.73	18.00	20.03	7.32	7.68	11.73	12.00	30	36	49	18
M14	2.00	20.67	21.00	23.36	8.62	8.98	13.73	14.00	34	40	53	21
M16	2.00	23.67	24.00	26.75	9.82	10.18	15.73	16.00	38	44	57	24
M18	2.50	26.67	27.00	30.14	11.28	11.72	17.73	18.00	42	48	61	27
M20	2.50	29.67	30.00	33.53	12.28	12.72	19.67	20.00	46	52	65	30
M22	2.50	33.38	34.00	37.72	13.78	14.22	21.67	22.00	50	56	69	34
M24	3.00	35.38	36.00	39.98	14.78	15.22	23.67	24.00	54	60	73	36
M27	3.00	40.00	41.00	45.20	16.35	17.35	26.48	27.00	60	66	79	41
M30	3.50	45.00	46.00	50.85	18.28	19.12	29.48	30.00	66	72	85	46
M33	3.50	49.00	50.00	55.37	20.58	21.42	32.38	33.00	–	78	91	50
M36	4.00	53.80	55.00	60.79	22.08	22.92	35.38	36.00	–	84	97	55
M42	4.50	63.10	65.00	71.30	25.58	26.42	41.38	42.00	–	96	109	65
M48	5.00	73.10	75.00	82.60	29.58	30.42	47.38	48.00	–	108	121	75
M56	5.50	82.80	85.00	93.56	34.50	35.50	55.26	56.00	–	–	137	85
M64	6.00	92.80	95.00	104.86	39.50	40.50	63.26	64.00	–	–	153	95

Diameter mm	Pitch mm	af	af	ac	ac	h	h	ds	ds	t	t	t
		Min	Max	Min	Min	Max	Min	Max	L ≤ 125	125 < L ≤ 200	L > 200
M8	1.00	12.73	13.00	14.38	5.15	5.45	7.78	8.00	22	28	41	13
M10	1.00/1.25	15.73	16.00	17.77	6.22	6.58	9.78	10.00	26	32	45	16
M12	1.25/1.50	17.73	18.00	20.03	7.32	7.68	11.73	12.00	30	36	49	18
M14	1.50	20.67	21.00	23.36	8.62	8.98	13.73	14.00	34	40	53	21
M16	1.50	23.67	24.00	26.75	9.82	10.18	15.73	16.00	38	44	57	24
M18	1.50	26.67	27.00	30.14	11.28	11.72	17.73	18.00	42	48	61	27
M20	1.50	29.67	30.00	33.53	12.28	12.72	19.67	20.00	46	52	65	30
M24	2.00	35.38	36.00	39.98	14.78	15.22	23.67	24.00	54	60	73	36

Diameter	Pitch (UNC)	Pitch (UNF)	af (Min)	af (Max)	ac (Min)	ac (Max)	h (Min)	h (Max)	ds (Min)	ds (Max)	t (Min)
1/4	20	28	0.428	0.438	0.488	0.505	0.150	0.163	0.245	0.250	3/4
5/16	18	24	0.489	0.500	0.557	0.577	0.195	0.211	0.306	0.313	7/8
3/8	16	24	0.551	0.562	0.628	0.650	0.226	0.243	0.369	0.375	1
7/16	14	20	0.612	0.625	0.698	0.722	0.272	0.291	0.430	0.438	1 1/8
1/2	13	20	0.736	0.750	0.840	0.866	0.302	0.323	0.493	0.500	1 1/4
9/16	12	18	0.798	0.812	0.910	0.938	0.348	0.371	0.554	0.563	1 3/8
5/8	11	18	0.922	0.938	1.051	1.083	0.378	0.403	0.617	0.625	1 1/2
3/4	10	16	1.100	1.125	1.245	1.299	0.455	0.483	0.741	0.750	1 3/4
7/8	9	14	1.285	1.312	1.461	1.516	0.531	0.563	0.866	0.875	2
1	8	12	1.469	1.500	1.675	1.732	0.591	0.627	0.990	1.000	2 1/4
1 1/8	7	12	1.631	1.688	1.859	1.949	0.658	0.718	1.114	1.125	2 1/2
1 1/4	7	12	1.812	1.875	2.066	2.165	0.749	0.813	1.239	1.250	2 3/4
1 3/8	6	12	1.994	2.062	2.273	2.382	0.810	0.878	1.363	1.375	3
1 1/2	6	12	2.175	2.250	2.480	2.598	0.902	0.974	1.488	1.500	3 1/4