Click Specification

Plain and Slotted Hex Washer Head Screws [Table 32] (ASTM F837, F468)

ASME B 18.6.3 (T32) - 2013

Display drawing:

Download CAD Model

Thread Size
d

10#

12#

d	Nominal Size
PP
s	max
	min
e	min
h	max
	min
d_c	max
	min
c	max
	min
n	max
	min
t	max
	min

0.0860	0.0990	0.1120	0.1250	0.1380	0.1510	0.1640	0.1900	0.2160
56	48	40	40	32	/	32	24	24
0.125	0.125	0.188	0.188	0.250	0.250	0.250	0.312	0.312
0.120	0.120	0.181	0.181	0.244	0.244	0.244	0.305	0.305
0.134	0.134	0.202	0.202	0.272	0.272	0.272	0.340	0.340
0.050	0.055	0.060	0.070	0.093	0.093	0.110	0.120	0.155
0.040	0.044	0.049	0.058	0.080	0.080	0.096	0.105	0.139
0.166	0.177	0.243	0.260	0.328	0.328	0.348	0.414	0.432
0.154	0.163	0.225	0.240	0.302	0.302	0.322	0.384	0.398
0.016	0.016	0.019	0.025	0.025	0.029	0.031	0.031	0.039
0.010	0.010	0.011	0.015	0.015	0.017	0.019	0.019	0.022
/	/	0.039	0.043	0.048	0.048	0.054	0.060	0.067
/	/	0.031	0.035	0.039	0.039	0.045	0.050	0.056
/	/	0.042	0.049	0.053	0.053	0.074	0.080	0.103
/	/	0.025	0.030	0.033	0.033	0.052	0.057	0.077

Thread Size
d

14#

1/4

5/16

20#

24#

3/8

7/16

1/2

d	Nominal Size
PP
s	max
	min
e	min
h	max
	min
d_c	max
	min
c	max
	min
n	max
	min
t	max
	min

0.2420	0.2500	0.3125	0.3200	0.3720	0.3750	0.4375	0.5000
/	20	18	/	/	16	14	13
0.375	0.375	0.500	0.500	0.562	0.562	0.625	0.750
0.367	0.367	0.489	0.489	0.551	0.551	0.610	0.735
0.409	0.409	0.545	0.545	0.614	0.614	0.682	0.820
0.190	0.190	0.230	0.230	0.295	0.295	0.348	0.400
0.172	0.172	0.208	0.208	0.270	0.270	0.321	0.367
0.520	0.520	0.676	0.676	0.780	0.780	0.870	1.040
0.480	0.480	0.624	0.624	0.720	0.720	0.790	0.960
0.050	0.050	0.055	0.055	0.063	0.063	0.073	0.085
0.030	0.030	0.035	0.035	0.037	0.037	0.043	0.050
0.075	0.075	0.084	0.084	0.084	0.094	0.094	0.106
0.064	0.064	0.072	0.072	0.072	0.081	0.081	0.091
0.111	0.111	0.134	0.134	0.134	0.168	0.175	0.195
0.083	0.083	0.100	0.100	0.100	0.131	0.140	0.155

②,Unless otherwise specified by purchaser, hex washer head screws are not slotted.
③,Fillet radius, R, at the edges and corners of the sides of the hex and the top of the washer shall not exceed 0.15 times the basic screw diameter.
④,Shape of indentation optional.
⑥,Machine Screw Length of Thread 1) Sizes No.5 and smaller. Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 1-1/8 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall, unless otherwise specified, have a minimum length of full-form thread of 1 in. 2) Sizes No.6 and smaller. Screws of nominal lengths equal to three diameters and shorter shall have full-form threads extending to within one pitch (thread) of the bearing surface of the head, or closer, if practicable. Nominal lengths greater than three diameters, up to and including 2 in., shall have full-form threads extending to within two pitches (threads) of the bearing surface of the head, or closer, if practicable. Screws of longer nominal lengths shall have a minimum length of full-form thread of 1.5 in. unless otherwise specified.
⑦,The diameter of body on machine screws having other than trim heads shall not be less than the Class 2A thread minimum pitch diameter nor greater than the basic major diameter of the thread.

Send Inquiry

Similar Standards

1	[JIS] JIS B 1189 (Type 1) - 2005	Hexagon Flange with flat upper face Bolt - Type 1 [Attached Table 1] View Suppliers
2	[JIS] JIS B 1189 (Type 1) - 2014	Hexagon Bolt with flange (Collar) - Type 1 - [Table JA.2] View Suppliers
3	[JIS] JIS B 1189 (Class 1) - 1977	Hexagon bolts with collar - class 1 View Suppliers
4	[ASME] ASME B 18.6.3 (T33-VI) - 2013	Recess Dimensions for Indented Hex Washer Head Screws，Type VI
5	[ASME] ASME B 18.6.3 (T33-I) - 2013	Cross Recess Dimensions for Indented Hex Washer Head Screws
6	[NF] NF E 27-711 - 1982	Hexagon Bolt with Collar
7	[AS] AS /NZS 1427 - 1996	ISO metric small series hexagon washer head screws