Tower Bolts, Nuts, And Foot Nails

Short Description:

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Detail

Size of elbow foot nails

											unit：mm
thread specification	la	lsa		h		ds		df	I	x		ba
	nominal	MaX	min	max	min	max	min	min	min	maX
M16	180	122	118	40	37.5	16.7	15.3	13	100	4		60
M20	200	122	118	50	47.5	20.84	19.16	16	100	5		80
M24	240	122	118	60	57.0	24.84	23.16	19	100	6		120
Note: 1. The size should be taken as a multiple of 5mm, and 1. The size and tolerance should comply with the provisions of Appendix A.
Designers can design additional dimensions as needed.

Dimensions of hexagonal foot nails

												unit：mm
thread specification	la	!		ds			ka		sa		ea	xa	ba
	nominal	max	min	Max	min	min	max	min	nominal	min	min	max
M16	180	122	118	16.7	15.3	100	10.75	9.25	24	23.16	26.17	4	60
M20	200	122	118	20.84	19.16	100	13.4	11.6	30	29.16	32.95	5	80

DL/T 284—2021

thread specification

nominal

max

min

max

min

max

min

nominal

min

max

M24

240

122

118

24.84

23.16

15.9

14.1

35.00

39.55

120

Note: 1. The size should be a multiple of 5mm, and I dimensions and tolerances should comply with the provisions of Appendix A.

Designers can design additional dimensions as needed.

Nut size

									unit：mm
thread specification	M10	M12	M16	M18	M20	M22	M24	M27	M30	M33
P	1.5	1.75	2	2.5	2.5	2.5	3	3	3.5	3.5

thread specification		M10	M12	M16	M18	M20	M22	M24	M27	M30	M33
dw,min		14.5	16.5	22	24.9	27.7	31.4	33.3	38	42.8	46.6
emin		17.59	19.85	26.17	29.56	32.95	37.29	39.55	45.2	50.85	55.37
	max	9.5	12.2	15.9	16.9	19.0	20.2	22.3	24.7	26.4	29.5
	min	8.0	10.4	14.1	15.1	16.9	18.1	20.2	22.6	24.3	27.4
mw,min		6.4	8.3	11.3	12.1	13:5	14.5	16.2	18.1	19.4	21.9
B	nominal=max	16.00	18.00	2,400	27.00	30.00	34	36	41	46	50
B	min	15.57	17.57	23.16	26.16	29.16	33	35	40	45	49
thread specification		M36	M39	M42	M45	M48	M52	M56	M60	M64	—
P		4		4.5	4.5	5	5	5.5	5.5	6.0
dw,min		51.1	55.9	60	64.7	69.5	74.2	78.7	88.4	88.2	—
emin		60.79	66.44	71.3	76.95	82.6	88.25	93.56	99.21	104.86
N	max	9	34.3	34.9	36.9	38.9		45.9	48.9	52.4	—
N	min		31.8	32.4	34.4	36.4	.4	43.4	46.4	49.4	—
mw,min		31	25.4	25.9	27.5	29.1	32.3	34.7	37.1	39.5	—
S	nominal=max	55	60.0	65.0	70.0	75.0	80.0	85.0	90.0	95.0	—
S	min	8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8	—

Bolt size

										unit：mm
thread specification		M10	M12	M16	M18	M20	M22	M24	M27	M30	M33
P		1.5	1.75	2	2.5	2.5	2.5	3	3	3.5	3.5
Bmin reference	Supporting single mother	14	17	22	24	27	28	31	34	37	40
Bmin reference	Matched double female	24	30	38	41	46	48	54	58	63	70
Xmax		3	3.5	4	5	5	5	6	6	7	7
Cmax		0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
ds,max		12.2	14.7	18.7	21.2	24.4	26.4	28.4	32.4	35.4	38.4
ds	max	10.58	12.7	16.7	18.7	20.84	22.84	24.84	27.84	30.84	34
ds	min	9.42	11.3	15.3	17.3	19.16	21.16	23.16	26.16	29.16	32
dw,min		14.47	16.47	22	24.85	27.7	31.35	33.25	38	42.75	46.55
emin		17.59	19.85	26.17	29.56	32.95	37.29	39.55	45.2	50.85	55.37
k	nominal	6.4	7.5	10	11.5	12.5	14	15	17	18.7	21
	max	6.85	7.95	10.75	12.4	13.4	14.9	15.9	17.9	19.75	22.05
	min	5.95	7.05	9.25	10.6	11.6	13.1	14.1	16.1	17.65	19.95
kw,min		4.17	4.94	6.48	7.42	8.12	9.17	9.87	11.27	12.36	13.97
rmin		0.4	0.6	0.6	0.6	0.8	0.8	0.8		1	1
S	nominal=max	16.00	18.00	24.00	27.00	30.00	34.00	36.00	41.00	46.00	50.00
S	min	15.57	17.57	23.16	26.16	29.16	33.00	35.00	40.00	45.00	49.00
lf,max		2	3	3	3	4	4	4	6	6	6
thread specification		M36	M39	M42	M45	M48	M52	M56	M60	M64	—
P		4	4	4.5	4.5	5	5	5.5	5.5	6	—
Bmin reference	Supporting single mother	44	46	48	50	54	58	62	65	70	—
Bmin reference	Matched double female	76	81	83	87	93	101	108	114	123
Xmax		8	8	9	9	10	10	11	11	12	—
Cmax		0.8	1	1	I	1	1	1	1	1
da,max		42.4	45.4	48.6	52.6	56.6	62.6	67	71	75
ds	max	37	40	43	46	49	53.2	57.2	61.2	65.2
ds	min	35	38	41	44	47	50.8	54.8	58.8	62.8
dw,min		51.11	55.86	59.95	64.7	69.45	74.2	78.66	83.14	88.16	—
k	nominal	22.5	25	26	28	30	33	35	38	40
	max	23.55	26.05	27.05	29.05	31.05	34.25	36.25	36.75	41.25	—
	min	21.45	23.95	24.95	26.95	28.95	31.75	33.75	39.25	38.75
kw,min		15.02	16.77	17.47	18.87	20.27	22.23	23.63	25.73	27.13	—
rmin		1	1	1.2	1.2	1.6	1.6	2	2	2	—
s	nominal=max	55.0	60.0	65.0	70.0	75.0	80.0	85.0	90.0	95.0	—
s	min	53.8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8	—
lcmax		6	6	8	8	10	10	12	12	13	—
Note 1: The size of lcmx shall be determined by the designer or the purchaser based on the need for fastening connections. Note 2: b is a design reference dimension, which is determined by exposing 3P after the assembly of single and double nuts. When assembling other functional nuts at the outer end, consideration should be given to lengthening them. The length of part B of the screw.