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Slotted Flat Countersunk Head Tapping Screws - Type A

Experience efficient thread creation and secure fastening with Slotted Flat Countersunk Head Tapping Screws featuring Type A thread forming capability, compliant with ASME B 18.6.4 - 1998 standards. Choose reliability and durability for your assembly needs.

Model:ASME B 18.6.4

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Product Description

Efficient Thread Creation: ASME B 18.6.4 - 1998 compliant Slotted Flat Countersunk Head Tapping Screws with Type A thread forming capability facilitate efficient thread creation during installation. This feature eliminates the need for pre-drilling, saving time and labor during assembly processes.

Secure Fastening: Designed with Type A thread forming capability, these screws ensure a secure and tight fit, enhancing the integrity of the assembled components. This reduces the risk of loosening or stripping, providing reliable fastening solutions for various applications.

Versatile Use: Slotted Flat Countersunk Head Tapping Screws with Type A thread forming capability are suitable for a wide range of materials, including metal, plastic, and wood. Whether used in construction, woodworking, or metalworking, they provide efficient and reliable fastening solutions.

Durable Construction: Crafted from high-quality materials, these tapping screws offer durability and resistance to corrosion, ensuring long-lasting performance even in challenging environments. Their robust construction makes them suitable for use in outdoor and industrial settings.

Nominal Diameter
d

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

0.060	0.073	0.086	0.099	0.112	0.125	0.138	0.151
3/16	3/16	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#

14#

16#

18#

20#

24#

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

0.164	0.190	0.216	0.242	0.268	0.294	0.320	0.372
7/16	1/2	9/16	5/8	3/4	13/16	13/16	1
0.312	0.362	0.412	0.462	0.512	0.561	0.611	0.711
0.285	0.333	0.380	0.427	0.475	0.522	0.569	0.664
0.100	0.116	0.132	0.148	0.164	0.180	0.196	0.228
0.054	0.060	0.067	0.075	0.075	0.084	0.084	0.094
0.045	0.050	0.056	0.064	0.064	0.072	0.072	0.081
0.045	0.053	0.060	0.068	0.075	0.083	0.090	0.105
0.029	0.034	0.039	0.044	0.049	0.054	0.059	0.069

①,Screws of these lengths and shorter shall have undercut heads as shown in tabulation.Use Type AB undercut head screws in place of Type A screws for theselengths and shorte.