BS 450 90 Degree Raised Countersunk Head Screws

Nom. Size of Screw	Basic Dia. D	Threads per Inch		Dia. of Head A		Depth of Head B		Width of Slot H		Depth of Slot J
Nom. Size of Screw	Basic Dia. D	BSW	BSF	Max.	Min.	Max.	Min.	Max.	Min.	Depth of Slot J
BS 450 - 1⁄8	0.125	40	...	0.219	0.201	0.056	...	0.039	0.032	0.027
BS 450 - 3⁄16	0.188	24	32c	0.328	0.307	0.084	...	0.05	0.042	0.041
BS 450 - 7⁄32	0.219	...	28c	0.383	0.36	0.098	...	0.055	0.046	0.048
BS 450 - 1⁄4	0.25	20	26	0.438	0.412	0.113	...	0.061	0.051	0.055
BS 450 - 5⁄16	0.313	18	22	0.547	0.518	0.141	...	0.071	0.061	0.069
BS 450 - 3⁄8	0.375	16	20	0.656	0.624	0.169	...	0.082	0.072	0.083
BS 450 - 7⁄16	0.438	14	18	0.766	0.729	0.197	...	0.093	0.082	0.097
BS 450 - 1⁄2	0.5	12	16	0.875	0.835	0.225	...	0.104	0.092	0.111
BS 450 - 9⁄16	0.563	12c	16c	0.984	0.941	0.253	...	0.115	0.103	0.125
BS 450 - 5⁄8	0.625	11	14	1.094	1.046	0.281	...	0.126	0.113	0.138
BS 450 - 3⁄4	0.75	10	12	1.312	1.257	0.338	...	0.148	0.134	0.166
a All dimensions, except J, given for the 18-through 38-inch sizes also apply to all the 90° Raised Countersunk Head Screw dimensions given in the Standard. b These screws are also available with recessed heads; recess are not given here but may be found in the Standard. c Non-preferred size; avoid use whenever possible. d By arrangement may also be 0.309. e By arrangement may also be 0.468. All dimensions in inches.