ASME B18.17 Type B Style 1 Wing Screws

Nominal Size	Threads per Inch	Series b	Head Blank size (Ref)	A		B		C		E		G		L
				Wing		Wing		Wing		Boss		Boss		Practical Screw Lengths
				Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
ANSI B18.17 - 10 (0.1900)	24	...	...	0.97	0.91	0.45	0.39	0.15	0.12	0.39	0.36	0.28	0.22	2	0.5
ANSI B18.17 - 1⁄4 (0.2500)	20	...	...	1.16	1.09	0.56	0.5	0.17	0.14	0.47	0.44	0.34	0.28	3	0.5
ANSI B18.17 - 5 ⁄ 16 (0.3125)	18	...	...	1.44	1.38	0.67	0.61	0.18	0.15	0.55	0.52	0.41	0.34	3	0.5
ANSI B18.17 - 3⁄8 (0.3750)	16	...	...	1.72	1.66	0.8	0.73	0.2	0.17	0.63	0.6	0.47	0.41	4	0.5
ANSI B18.17 - 7 ⁄ 16 (0.4375)	14	...	...	2	1.94	0.91	0.84	0.21	0.18	0.71	0.68	0.53	0.47	3	1
ANSI B18.17 - 1⁄2 (0.5000)	13	...	...	2.31	2.22	1.06	0.94	0.23	0.2	0.79	0.76	0.62	0.5	3	1
ANSI B18.17 - 5⁄8 (0.6250)	11	...	...	2.84	2.72	1.31	1.19	0.27	0.23	0.96	0.92	0.75	0.62	2.5	1