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

ASME B 18.6.3 (T2-I/T2-IA+T40) - 2013

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Thread Size
d

d ^①	Nominal Size
PP
d_k	max
	min
k	Ref
M₁	Type I
M₂	Type IA
P	Type I Max.
	Type I Min.
	Type IA Max.
	Type IA Min.
Socket No.	Type I
	Type IA
α	Min.
	Max.
L₀ ^④	Nominal
Y ^④	max.	Fully Threaded
b ^④	min.	Thread Length (Long screws)

0.0600	0.0730	0.0860	0.0990	0.1120	0.1250	0.1380	0.1510
48	42	32	28	24	20	20	19
0.112	0.137	0.162	0.187	0.212	0.237	0.262	0.287
0.096	0.120	0.144	0.167	0.191	0.215	0.238	0.262
0.035	0.043	0.051	0.059	0.067	0.075	0.083	0.091
0.062	0.070	0.096	0.100	0.122	0.148	0.168	0.176
0.062	0.070	0.096	0.100	0.122	0.148	0.168	0.176
0.036	0.044	0.056	0.061	0.082	0.075	0.095	0.103
0.020	0.028	0.040	0.045	0.066	0.052	0.072	0.080
0.037	0.045	0.053	0.058	0.079	0.071	0.091	0.099
0.021	0.029	0.037	0.042	0.063	0.053	0.073	0.081
0	0	1	1	1	2	2	2
0	0	1	1	1	2	2	2
80°	80°	80°	80°	80°	80°	80°	80°
82°	82°	82°	82°	82°	82°	82°	82°
7/16	9/16	5/8	3/4	13/16	15/16	1	1-1/8
0.021	0.024	0.031	0.036	0.042	0.050	0.050	0.053
0.360	0.440	0.520	0.590	0.670	0.750	0.830	0.910

Thread Size
d

10#

12#

1/4

5/16

3/8

7/16

1/2

d ^①	Nominal Size
PP
d_k	max
	min
k	Ref
M₁	Type I
M₂	Type IA
P	Type I Max.
	Type I Min.
	Type IA Max.
	Type IA Min.
Socket No.	Type I
	Type IA
α	Min.
	Max.
L₀ ^④	Nominal
Y ^④	max.	Fully Threaded
b ^④	min.	Thread Length (Long screws)

0.1640	0.1900	0.2160	0.2500	0.3125	0.3750	0.4375	0.5000
18	16	14	14	12	12	10	10
0.312	0.362	0.412	0.477	0.597	0.717	0.760	0.815
0.285	0.333	0.380	0.442	0.556	0.670	0.715	0.765
0.100	0.116	0.132	0.153	0.191	0.230	0.223	0.223
0.182	0.198	0.262	0.276	0.358	0.386	0.402	0.418
0.182	0.198	0.262	0.276	0.358	0.386	0.402	0.418
0.110	0.125	0.139	0.154	0.196	0.225	0.241	0.256
0.087	0.102	0.116	0.131	0.174	0.203	0.219	0.234
0.107	0.122	0.136	0.151	0.193	0.222	0.238	0.253
0.089	0.104	0.118	0.133	0.175	0.204	0.22	0.235
2	2	3	3	4	4	4	4
2	2	3	3	4	4	4	4
80°	80°	80°	80°	80°	80°	80°	80°
82°	82°	82°	82°	82°	82°	82°	82°
1-1/4	1-3/8	1-5/8	1-13/16	1-13/16	1-7/8	1-7/8	1-7/8
0.056	0.062	0.071	0.071	0.083	0.083	0.100	0.100
0.980	1.140	1.300	1.500	1.500	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.

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17	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI3]
18	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 14]
19	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 10]
20	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type B and BP Thread Forming [Table 18]
21	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 15]
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23	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 16]
24	[ASME] ASME B 18.6.5M - 2000 (R2010)	Metric cross recessed countersunk head tapping screws [Table 9]
25	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 11]
26	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 15]
27	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI4]
28	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type B and BP Thread Forming [Table 19]
29	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 11]
30	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI3]
31	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 12]
32	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 10]
33	[ASME] ASME B 18.6.5M - 2000 (R2010)	Metric Type IA Cross-Recessed Flat Countersunk Head Tapping Screws [Table 10]
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35	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type AB Thread Forming [Table 18]
36	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type A Thread Forming [Table 12]
37	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type A Thread Forming [Table 18]
38	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 15]
39	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 12]
40	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type AB Thread Forming [Table 19]
41	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Head Tapping Screws - Type A Thread Forming [Table 10]
42	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 16]
43	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI2]
44	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type A Thread Forming [Table 19]
45	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI4]
46	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type A Thread Forming [Table 17]
47	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type B and BP Thread Forming [Table 17]
48	[ASME] ASME B 18.6.4 - 1998	Type IA Cross Recessed Flat Countersunk Trim Head Tapping Screws - Type C Thread Forming [Table 18]
49	[ASME] ASME B 18.6.4 - 1998	Type II Cross Recessed Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 12]
50	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed 100°Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI2]
51	[ASME] ASME B 18.6.4 - 1998	Type I Cross Recessed Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 14]
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53	[UNI] UNI 6955	Cross-Recessed Flat Countersunk Head Tapping Screws
54	[UNI] UNI 9709 - 1990	Two-thread countersunk (flat) head tapping screws with cross rocessed for plastics
55	[JIS] JIS B 1122 (AAT2) - 1996	Cross Recessed Countersunk Head Tapping Screws - threaded portion are of class 1 to 4 [Annex attached table 2]
56	[JIS] JIS B 1125 - 2015	Flex. Purpose Drilling Tapping Screws
57	[BS] BS 4174 - 1972	Recess 80°Truncated Countersunk Head Screws - Type Z [Table 11]
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63	[JIS] JIS B 1125 - 1995	Cross recessed bugle head self-drilling tapping screws
64	[BS] BS 4174 - 1972	Recess 80°countersunk Head Screws - Type Z [Table 9]
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