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80° Slotted Undercut Oval Countersunk Head Tapping Screws [Table 11]

Choose 80° Slotted Undercut Oval Countersunk Head Tapping Screws for precise and efficient fastening in various industries. Compliant with ASME B 18.6.3 - 2013 standards, these screws offer reliability, durability, and versatility, ensuring optimal performance in diverse applications.

Model:ASME B 18.6.3

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Product Description

Innovative Design: 80° Slotted Undercut Oval Countersunk Head Tapping Screws, as outlined in ASME B 18.6.3 - 2013, feature an innovative design tailored for specific fastening needs. The undercut oval countersunk head provides a flush finish, reducing the risk of snagging or protrusion, ensuring a smooth surface upon installation.

Precision Tapping: These screws are engineered for precision tapping, allowing for efficient creation of threaded holes in various materials. The 80° slotted head facilitates easy installation and removal, enhancing the overall assembly process and reducing assembly time.

Enhanced Performance: With their specialized design and high-quality materials, these tapping screws offer enhanced performance and durability. They provide reliable fastening in applications where a flush finish and secure hold are paramount, contributing to the longevity and integrity of assembled components.

Wide Application: Suitable for a wide range of applications, these tapping screws excel in industries such as construction, woodworking, and metalworking. Their versatility and effectiveness make them a preferred choice for professionals seeking reliable and efficient fastening solutions.

Thread Size
d

7# ^③

10#

12#

d	Nominal Size
PP	UNC
L ^②
d_k	max
d_k	min
k	Ref
f	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	0.1640	0.1900	0.2160
-	64	56	48	40	40	32	-	32	24	24
1/8	1/8	1/8	1/8	3/16	3/16	3/16	/	1/4	5/16	3/8
0.112	0.137	0.162	0.187	0.212	0.237	0.262	0.287	0.312	0.362	0.412
0.096	0.120	0.144	0.167	0.191	0.215	0.238	0.262	0.285	0.333	0.380
0.025	0.031	0.036	0.042	0.047	0.053	0.059	0.064	0.070	0.081	0.092
0.021	0.025	0.029	0.033	0.037	0.041	0.045	0.049	0.052	0.060	0.068
0.023	0.026	0.031	0.035	0.039	0.043	0.048	0.048	0.054	0.060	0.067
0.016	0.019	0.023	0.027	0.031	0.035	0.039	0.039	0.045	0.050	0.056
0.028	0.034	0.040	0.047	0.053	0.059	0.065	0.071	0.078	0.090	0.103
0.022	0.027	0.033	0.038	0.043	0.048	0.053	0.059	0.064	0.074	0.085

Thread Size
d

14# ^③

1/4

16# ^③

18# ^③

5/16

20# ^③

24# ^③

3/8

7/16

1/2

d	Nominal Size
PP	UNC
L ^②
d_k	max
d_k	min
k	Ref
f	Ref.
n	max
n	min
t	max
t	min

0.2420	0.2500	0.2680	0.2940	0.3125	0.3200	0.3720	0.3750	0.4375	0.5000
-	20	-	-	18	-	-	16	14	13
/	7/16	/	/	1/2	/	/	9/16	5/8	3/4
0.462	0.477	0.512	0.561	0.597	0.611	0.711	0.717	0.760	0.815
0.427	0.442	0.475	0.522	0.556	0.569	0.664	0.670	0.715	0.765
0.104	0.107	0.115	0.126	0.134	0.137	0.160	0.161	0.156	0.156
0.076	0.079	0.084	0.092	0.099	0.100	0.116	0.117	0.122	0.131
0.075	0.075	0.075	0.084	0.084	0.084	0.094	0.094	0.094	0.106
0.064	0.064	0.064	0.072	0.072	0.072	0.081	0.081	0.081	0.091
0.115	0.119	0.127	0.140	0.149	0.152	0.177	0.179	0.184	0.204
0.096	0.098	0.106	0.116	0.124	0.127	0.148	0.149	0.154	0.169

①,Edge of head may be rounded or flat.
②,Screws of these lengths and shorter shall have undercut heads.
③,7#, 14#, 16#, 18#, 20#, 24# are for tapping screws only.
⑤,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.
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.

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