Click Specification

82° Square Recessed Countersunk Head Tapping Screws - Type AB (ABR)

ASME B 18.6.3 (T2-III+T40) - 2013

Display drawing:

Thread Size
d

10#

12#

1/4

5/16

3/8

d ^①	Nominal Size
PP
d_k	max
	min
k	Ref
M	Ref
P	max
	min
Socket No.
α	max
	min
L₀ ^④	Nominal Size
Y ^④	Fully Threaded	max
b ^④	Thread Length (Long screws)	min

0.0860	0.0990	0.1120	0.1250	0.1380	0.1510	0.1640	0.1900	0.2160	0.2500	0.3125	0.3750
32	28	24	20	20	19	18	16	14	14	12	12
0.162	0.187	0.212	0.237	0.262	0.287	0.312	0.362	0.412	0.477	0.597	0.717
0.144	0.167	0.191	0.215	0.238	0.262	0.285	0.333	0.380	0.442	0.556	0.670
0.051	0.059	0.067	0.075	0.083	0.091	0.100	0.116	0.132	0.153	0.191	0.230
0.050	0.070	0.070	0.091	0.091	0.091	0.112	0.112	0.133	0.133	0.191	0.191
0.033	0.038	0.038	0.055	0.055	0.065	0.063	0.075	0.095	0.095	0.100	0.100
0.028	0.028	0.028	0.040	0.040	0.050	0.048	0.060	0.080	0.080	0.085	0.085
00	0	0	1S	1S	1R	2S	2R	3R	3R	4R	4R
82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°
80°	80°	80°	80°	80°	80°	80°	80°	80°	80°	80°	80°
5/8	3/4	13/16	15/16	1	1-1/8	1-1/4	1-3/8	1-5/8	1-13/16	1-13/16	1-7/8
0.031	0.036	0.042	0.050	0.050	0.053	0.056	0.062	0.071	0.071	0.083	0.083
0.520	0.590	0.670	0.750	0.830	0.910	0.980	1.140	1.300	1.500	1.500	1.500

①,Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omitted.
②,No extrusion of excess metal beyond the apex of the point resulting from thread rolling shall be permissible . A slight rounding or truncation of the point is desirable.
③,The width of flat at crest of thread shall not exceed 0.004 in. for sizes up to and including No. 8, and 0.006 in. for larger sizes.
④,For screws of norminal lengths equal to or shorter than the nominal screw lengths, L0, listed in Table, the full-form threads shall extend close to the head such that the minor diamter limits of the specified thread are maintained to within Y daistance from the underside of the head, or closer if practicable. Screws of nominal lengths, L0, longer than those tabulated in table shall have a minimum length of full-form thread as shown in the "b Min" column of table, unless otherwise specified by the purchaser.

Alternative history

ASME B 18.6.3T2-III+T40 - 2013 ASME B 18.6.3H1B-III+T1A - 2024

Send Inquiry

Similar Standards

1	[ASME] ASME B 18.6.5M (T11) - 2000	Metric square recessed flat countersunk tapping screws [Table 11] View Suppliers
2	[ASME] ASME B 18.6.5M (T11) - 2000 (R2010)	Metric Type Ill Square-Recessed Flat Countersunk Head Tapping Screws [Table 11] View Suppliers
3	[ASME] ASME B 18.6.5M (T19) - 2000	Metric square slot pan head tapping screws [Table 19]
4	[ASME] ASME B 18.6.3 (T25-III+T40) - 2013	Square Recessed Mushroom Head Tapping Screws - Type AB and ABR
5	[ASME] ASME B 18.6.5M (T19) - 2000 (R2010)	Metric Type Ill Square-Recessed Pan Head Tapping Screws [Table 19]
6	[ASME] ASME B 18.6.3 (T8-III+T40) - 2013	Square recessed raised countersunk head tapping screws - Type AB and ABR
7	[ASME] ASME B 18.6.5M (T15) - 2000 (R2010)	Metric Type III square-recessed oval countersunk head tapping screws
8	[ASME] ASME B 18.6.3 (H7B-III+T1A) - 2024	Square Recessed Mushroom Head Tapping Screws - Type AB and ABR
9	[ASME] ASME B 18.6.3 (H3B-III+T1A) - 2024	Undercut 82-deg Square Recessed Countersunk Head Tapping Screws - Type AB (ABR)
10	[ASME] ASME B 18.6.3 (T12-III+T40) - 2013	Square recessed undercut oval countersunk head tapping screws - Type AB and ABR
11	[ASME] ASME B 18.6.3 (H6B-III+T1A) - 2024	Cross recessed raised cheese head tapping screws - Type AB and ABR
12	[ASME] ASME B 18.6.3 (H2B-III+T1A) - 2024	Square recessed raised countersunk head tapping screws - Type AB and ABR
13	[ASME] ASME B 18.6.3 (T19-III+T40) - 2013	Square Recessed Pan Head Tapping Screws - Type AB and ABR
14	[ASME] ASME B 18.6.3 (T22-III+T40) - 2013	Square Recessed Raised Cheese Head Tapping Screws - Type AB and ABR
15	[ASME] ASME B 18.6.3 (H1B-III+T1A) - 2024	Square Recessed Countersunk Head Screws (ASTM F837, F468)
16	[ASME] ASME B 18.6.3 (H11B-III+T1A) - 2024	Square Recessed Round Head Tapping Screws - Type AB and ABR
17	[ASME] ASME B 18.6.3 (T10-III+T40) - 2013	Undercut 82-deg Square Recessed Countersunk Head Tapping Screws - Type AB (ABR)
18	[ASME] ASME B 18.6.3 (T36-III+T40) - 2013	Square Recessed Round Head Tapping Screws - Type AB and ABR
19	[ASME] ASME B 18.6.3 (H3D-III+T1A) - 2024	Square recessed undercut oval countersunk head tapping screws - Type AB and ABR
20	[ASME] ASME B 18.6.3 (H5C-III+T1A) - 2024	Square Recessed Pan Head Tapping Screws - Type AB and ABR
21	[WS] WS 9200 - 2014	Hexagon socket cheese head self-tapping screws