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Cross Recessed Raised Cheese Head Screws with B.S.W. & B.S.F. Threads [Table 7]

BS 450 - 1958

Display drawing:

Thread Size
d

1/8

3/16

7/32

1/4

5/16

3/8

7/16

1/2

d
PP	No. of Threads/Inch	B.S.W.
		B.S.F.
d_k	max
	min
h	Nominal Size
k	max
	min
r	max
R	max
Socket No.
M	Nominal Size
t	max
	min

0.1250	0.1875	0.2188	0.2500	0.3125	0.3750	0.4375	0.500
40	24	/	20	18	16	14	12
/	(32)	(28)	26	22	20	18	16
0.205	0.313	0.357	0.414	0.518	0.622	0.625	0.750
0.187	0.292	0.334	0.389	0.490	0.590	0.589	0.710
0.083	0.124	0.142	0.163	0.199	0.260	0.284	0.311
0.120	0.180	0.205	0.237	0.295	0.355	0.368	0.412
0.100	0.156	0.178	0.207	0.262	0.315	0.321	0.362
0.010	0.015	0.015	0.031	0.031	0.031	0.031	0.031
0.020	0.025	0.025	0.040	0.045	0.045	0.050	0.050
2	2	3	3	3	4	4	4
0.135	0.184	0.242	0.266	0.314	0.371	0.392	0.413
0.076	0.122	0.135	0.160	0.212	0.230	0.252	0.274
0.058	0.104	0.117	0.142	0.194	0.212	0.234	0.256

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