BS 3692 Precision Hexagon Nuts

Nominal Size and Thread Diameter^a d	Pitch of Thread Coarse Pitch Series	Width Across Flats s		Width Across Corners e		Thickness of Nut m		Tolerance on Squareness of Thread to Face of Nut^b	Eccentricity of Hexagon
Nominal Size and Thread Diameter^a d	Pitch of Thread Coarse Pitch Series	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Max.
BS 3692 - M1.6	0.35	3.2	3.08	3.7	3.48	1.3	1.05	0.05	0.14
BS 3692 - M2	0.4	4	3.88	4.6	4.38	1.6	1.35	0.06	0.14
BS 3692 - M2.5	0.45	5	4.88	5.8	5.51	2	1.75	0.08	0.14
BS 3692 - M3	0.5	5.5	5.38	6.4	6.08	2.4	2.15	0.09	0.14
BS 3692 - M4	0.7	7	6.85	8.1	7.74	3.2	2.9	0.11	0.18
BS 3692 - M5	0.8	8	7.85	9.2	8.87	4	3.7	0.13	0.18
BS 3692 - M6	1	10	9.78	11.5	11.05	5	4.7	0.17	0.18
BS 3692 - M8	1.25	13	12.73	15	14.38	6.5	6.14	0.22	0.22
BS 3692 - M10	1.5	17	16.73	19.6	18.9	8	7.64	0.29	0.22
BS 3692 - M12	1.75	19	18.67	21.9	21.1	10	9.64	0.32	0.27
BS 3692 - M14	2	22	21.67	25.4	24.49	11	10.57	0.37	0.27
BS 3692 - M16	2	24	23.67	27.7	6.75	13	12.57	0.41	0.27
BS 3692 - M18	2.5	27	26.67	31.2	30.14	15	14.57	0.46	0.27
BS 3692 - M20	2.5	30	29.67	34.6	33.53	16	15.57	0.51	0.33
BS 3692 - M22	2.5	32	31.61	36.9	35.72	18	17.57	0.54	0.33
BS 3692 - M24	3	36	35.38	41.6	39.98	19	18.48	0.61	0.33
BS 3692 - M27	3	41	40.38	47.3	45.63	22	21.48	0.7	0.33
BS 3692 - M30	3.5	46	45.38	53.1	51.28	24	23.48	0.78	0.33
BS 3692 - M33	3.5	50	49.38	57.7	55.8	26	25.48	0.85	0.39
BS 3692 - M36	4	55	54.26	63.5	61.31	29	28.48	0.94	0.39
BS 3692 - M39	4	60	59.26	69.3	66.96	31	30.38	1.03	0.39
BS 3692 - M42	4.5	65	64.26	75.1	72.61	34	33.38	1.11	0.39
BS 3692 - M45	4.5	70	69.26	80.8	78.26	36	35.38	1.2	0.39
BS 3692 - M48	5	75	74.26	86.6	83.91	38	37.38	1.29	0.39
BS 3692 - M52	5	80	79.26	92.4	89.56	42	41.38	1.37	0.46
BS 3692 - M56	5.5	85	84.13	98.1	95.07	45	44.38	1.46	0.46
BS 3692 - M60	5.5	90	89.13	103.9	100.72	48	47.38	1.55	0.46
BS 3692 - M64	6	95	94.13	109.7	106.37	51	50.26	1.63	0.46
BS 3692 - M68	6	100	99.13	115.5	112.02	54	53.26	1.72	0.46
a Sizes shown in parentheses are non-preferred. b As measured with the nut squareness gage described in the text and illustrated in Appendix A of the Standard and a feeler gage. All dimensions are in millimeters. For illustration of hexagon nuts and thin nuts