Click Specification

Slotted Flat Countersunk Head Tapping Screws - Type B and BP

ASME B 18.6.4 - 1998

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Nominal Diameter
d

d	Nominal Size
L	min
d_k	max
d_k	min
k	Ref.
n	max
n	min
t	max
t	min

0.0600	0.0730	0.0860	0.0990	0.1120	0.1250	0.1380	0.1510
1/8	5/32	3/16	7/32	1/4	1/4	5/16	3/8
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
0.023	0.026	0.031	0.035	0.039	0.043	0.048	0.048
0.016	0.019	0.023	0.027	0.031	0.035	0.039	0.039
0.015	0.019	0.023	0.027	0.030	0.034	0.038	0.041
0.010	0.012	0.015	0.017	0.020	0.022	0.024	0.027

Nominal Diameter
d

10#

12#

1/4

5/16

3/8

7/16

1/2

d	Nominal Size
L	min
d_k	max
d_k	min
k	Ref.
n	max
n	min
t	max
t	min

0.1640	0.1900	0.2160	0.2500	0.3125	0.3750	0.4375	0.5000
7/16	1/2	9/16	5/8	5/8	5/8	3/4	3/4
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
0.054	0.060	0.067	0.075	0.084	0.094	0.094	0.106
0.045	0.050	0.056	0.064	0.072	0.081	0.081	0.091
0.045	0.053	0.060	0.070	0.088	0.106	0.103	0.103
0.029	0.034	0.039	0.046	0.058	0.070	0.066	0.065

①,Screws of these lengths and shorter shall have undercut heads as shown in tabulation.

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Similar Standards

1	[DIN EN ISO] DIN EN ISO 1482 - 2011	Slotted Countersunkhead Tapping Screws View Suppliers
2	[DIN] DIN 7972 - 1990	Slotted countersunkhead tapping screws View Suppliers
3	[ASME] ASME B 18.6.4 - 1998	Slotted Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 13]
4	[ASME] ASME B 18.6.4 - 1998	Slotted Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 13]
5	[ISO] ISO 1482 - 1983	Slotted countersunk head tapping screws
6	[ASME] ASME B 18.6.4 - 1998	Slotted Flat Countersunk Head Tapping Screws - Type C
7	[IFI] IFI 502 - 1982	Metric Slotted Countersunk Head Tapping Screws
8	[ASME] ASME B 18.6.4 - 1998	Slotted 100° Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI1]
9	[ASME] ASME B 18.6.3 (T9+T40) - 2013	82° Slotted Undercut 82-deg Flat Countersunk Head Tapping Screws [Table 9]
10	[ASME] ASME B 18.6.5M - 2000 (R2010)	Metric slotted countersunk head tapping screws [Table 8]
11	[ASME] ASME B 18.6.4 - 1998	Slotted Flat Countersunk Head Tapping Screws - Type A
12	[ASME] ASME B 18.6.4 - 1998	Slotted 100° Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI1]
13	[ISO] ISO 1482 - 2011	Slotted Countersunk (Flat) Head Tapping Screws
14	[ASME/ANSI] ASME/ANSI B 18.6.3 - 2010	80° Machine Screw and Tapping Screw Nuts (Inch Seires)
15	[ASME] ASME B 18.6.4 - 1998	Slotted Flat Countersunk Head Tapping Screws - Type AB
16	[ASME] ASME B 18.6.4 - 1998	Slotted Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 13]
17	[ASME] ASME B 18.6.3 (T1+T40) - 2013	82° Slotted Flat Coutersunk Head Tapping Screws - Type AB (ABR) [Table 1+Table 40]
18	[BS] BS 4174 - 1972	Slotted 80° Truncated Countersunk Head Screws [Table 10]
19	[BS] BS 4174 - 1972	Slotted 80°countersunk Head Self-Tapping Screws [Table 8]
20	[JIS] JIS B 1115 (F) - 1996	Slotted countersunk head tapping screws
21	[NF] NF E 25-660 - 1994	Slotted Countersunk Head Tapping Screws
22	[JIS] JIS B 1115 (F) - 2006	Slotted Countersunk Head Tapping Screws
23	[GB] GB /T 5283 - 2017	Slotted Countersunk（Flat）Head Tapping Screws
24	[GB] GB /T 5283 - 1985	Slotted countersunk head tapping screws
25	[AS] AS /NZS 4404 - 1996	ISO metric slotted countersunk head tapping screws
26	[CNS] CNS 4303 - 2000	Slotted Countersunk Head Tapping Screws