User:Peter Horn/Sandbox.6

British Standard Fine

Version No. 1

11⁄32 in (8.7 mm)
8.59 mm (11⁄32 in)

Diameter			Thread density (threads per inch)	As BSC?	Nut (mm)	Approx. nut (inches)	Tap drill
(inches)		(mm)
3⁄16	0.19	4.83	32	Yes bb	8.59	11⁄32 6pt	5⁄32 in
7⁄32	0.22	5.59	28		?	?	4.6 mm
1⁄4	0.25	6.35	26	Yes	11.30	—	5.3 mm
5⁄16	0.31	7.87	22		13.34	17⁄32	17⁄64 in
3⁄8	0.375	9.53	20		15.24	5⁄8	8.2 mm
7⁄16	0.44	11.18	18		18.03	—	9.7 mm
1⁄2	0.50	12.70	16		20.83	13⁄16	7⁄16 in
9⁄16	0.56	14.22	16		23.37	15⁄16	1⁄2 in
5⁄8	0.63	16.00	14		25.65	1 6pt	14 mm
11⁄16	0.69	17.53	14		27.94	1+1⁄8 6pt	15.5 mm
3⁄4	0.75	19.05	12		30.48	1+1⁄4 6pt	16.75 mm
7⁄8	0.88	22.35	11		33.02	1+5⁄16	25⁄32 in
1	1.00	25.40	10		37.59	1+1⁄2	22.75 mm
1+1⁄8	1.13	28.70	9		42.42	1+11⁄16	26.50 mm
1+1⁄4	1.25	31.75	9		47.24	1+7⁄8	28.75 mm
1+1⁄2	1.50	38.10	8		56.39	2+1⁄4	34.50 mm

Version no. 2

11⁄32 in (8.7 mm)
8.59 mm (11⁄32 in)

Diameter			Thread density (threads per inch)	As BSC?	Nut		Tap drill
(inches)		(mm)			(mm)	(inches)
3⁄16	0.19	4.83	32	Yes bb	8.59	11⁄32 6pt	5⁄32 in
7⁄32	0.22	5.59	28		?	?	4.6 mm
1⁄4	0.25	6.35	26	Yes	11.30	7⁄16	5.3 mm
5⁄16	0.31	7.87	22		13.35	17⁄32	17⁄64 in
3⁄8	0.375	9.53	20		15.24	19⁄32	8.2 mm
7⁄16	0.44	11.18	18		18.03	23⁄32	9.7 mm
1⁄2	0.50	12.70	16		20.83	13⁄16	7⁄16 in
9⁄16	0.56	14.22	16		23.37	29⁄32	1⁄2 in
5⁄8	0.63	16.00	14		25.65	1+1⁄64 6pt	14 mm
11⁄16	0.69	17.53	14		27.94	1+3⁄32 6pt	15.5 mm
3⁄4	0.75	19.05	12		30.48	1+3⁄16 6pt	16.75 mm
7⁄8	0.88	22.35	11		33.02	1+5⁄16	25⁄32 in
1	1.00	25.40	10		37.59	1+15⁄32	22.75 mm
1+1⁄8	1.13	28.70	9		42.42	1+21⁄32	26.50 mm
1+1⁄4	1.25	31.75	9		47.24	1+7⁄8	28.75 mm
1+1⁄2	1.50	38.10	8		56.39	2+7⁄32	34.50 mm