Click Specification

(Non-preferred) dimensions in parentheses.

Square bolts faced under head, and faced under head and turned on shank with B.S.Threads - Black [Table 2]

BS 916 - 1953

Display drawing:

Thread Size
d

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

7/8

1-1/8

1-1/4

(1-3/8)

1-1/2

(1-5/8)

PP	No. of Threads/Inch	BSW
		BSF
d_s	faced under head	max
	faced under head and turned on shank	max
		min
s	max
	min
e	max
r	max
k	max
	min

20	18	16	14	12	12	11	10	9	8	7	7	6	6	5
26	22	20	18	16	16	14	12	11	10	9	9	8	8	8
0.280	0.342	0.405	0.468	0.530	0.592	0.665	0.790	0.915	1.040	1.175	1.300	1.425	1.550	1.685
0.2500	0.3125	0.3750	0.4375	0.5000	0.5625	0.625	0.750	0.875	1.000	1.125	1.250	1.375	1.500	1.625
0.2465	0.3090	0.3715	0.4335	0.4960	0.5585	0.619	0.744	0.867	0.992	1.117	1.242	1.365	1.490	1.615
0.445	0.525	0.600	0.710	0.820	0.920	1.010	1.200	1.300	1.480	1.670	1.860	2.050	2.220	2.410
0.435	0.515	0.585	0.695	0.800	0.900	0.985	1.175	1.270	1.450	1.640	1.815	2.005	2.175	2.365
0.63	0.74	0.85	1.00	1.16	1.30	1.43	1.70	1.84	2.09	2.36	2.63	2.90	3.14	3.41
1/32	1/32	1/32	1/32	1/32	1/32	1/32	1/32	1/32	1/32	3/64	3/64	3/64	3/64	3/64
0.176	0.218	0.260	0.302	0.343	0.375	0.417	0.500	0.583	0.666	0.75	0.83	0.92	1.00	1.08
0.156	0.198	0.240	0.282	0.323	0.345	0.387	0.470	0.553	0.636	0.71	0.79	0.88	0.96	1.02

Thread Size
d

1-3/4

2-1/4

2-1/2

2-3/4

(3-1/4)

3-1/2

(3-3/4)

4-1/2

5-1/2

PP	No. of Threads/Inch	BSW
		BSF
d_s	faced under head	max
	faced under head and turned on shank	max
		min
s	max
	min
e	max
r	max
k	max
	min

5	4.5	4	4	3.5	3.5	3.25	3.25	3	3	2.875	2.75	2.625	2.5
7	7	6	6	6	5	5	4.5	4.5	4.5	4	4	4	4
1.810	2.060	/	/	/	/	/	/	/	/	/	/	/	/
1.750	2.000	2.250	2.500	2.750	3.000	3.250	3.500	3.750	4.000	4.500	5.000	5.500	6.000
1.740	1.990	2.240	2.490	2.740	2.990	3.235	3.485	3.735	3.980	4.480	4.980	5.480	5.980
2.580	2.760	3.150	3.550	3.890	4.180	4.530	4.850	5.180	5.550	6.380	7.300	8.350	9.450
2.520	2.700	3.090	3.490	3.830	4.080	4.430	4.750	5.080	5.450	6.255	7.175	8.225	9.325
3.65	3.90	4.45	5.02	5.50	5.91	6.41	6.86	7.33	7.85	9.02	10.32	11.81	13.36
3/64	3/64	1/16	1/16	1/16	1/16	3/32	3/32	3/32	3/32	1/8	1/8	1/8	1/8
1.17	1.33	1.50	1.67	1.83	2.00	2.17	2.33	2.50	2.67	3.00	3.33	3.67	4.00
1.11	1.27	1.42	1.59	1.75	1.90	2.07	2.23	2.40	2.57	2.85	3.18	3.52	3.85

Alternative history

BS 916 - 1953 BS 916 - 1953

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