ASME B 18.6.4 - 1998 Slotted Flat Countersunk Head Tapping Screws - Type A

Unit:

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
3/16	3/16	3/16
0.112	0.137	0.162
0.096	0.120	0.144
0.035	0.043	0.051
0.023	0.026	0.031
0.016	0.019	0.023
0.015	0.019	0.023
0.010	0.012	0.015

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.

GB /T 5283 - 2017

Slotted Countersunk（Flat）Head Tapping Screws

GB /T 5283 - 1985

Slotted Countersunk Head Tapping Screws

IFI 502 - 1982

Metric Slotted Countersunk Head Tapping Screws

DIN 7972 - 1990

Slotted countersunkhead tapping screws
Suppliers(1)

ISO 1482 - 2011

Slotted Countersunk (Flat) Head Tapping Screws

ISO 1482 - 1983

Slotted countersunk head tapping screws

JIS B 1115 (JA4) - 2015

Slotted Countersunk head tapping screws [Table JA3]

JIS B 1115 (T6) - 2015

Slotted Countersunk Head Tapping Screws [Table 6]

JIS B 1115 (T2) - 1996

Slotted countersunk head tapping screws [Table 2]

JIS B 1115 (AT2) - 1996

Slotted Countersunk head tapping screws [Annex Table 2]

ASME/ANSI B 18.6.3 - 2010

80° Machine Screw and Tapping Screw Nuts (Inch Seires)

NF E 25-660 - 1994

Slotted Countersunk Head Tapping Screws

BS 4174 - 1972

Slotted 80°countersunk Head Self-Tapping Screws [Table 8]

BS 4174 - 1972

Slotted 80° Truncated Countersunk Head Screws [Table 10]

AS /NZS 4404 - 1996

ISO metric slotted countersunk head tapping screws

CNS 4303 - 2000

Slotted Countersunk Head Tapping Screws

DIN EN ISO 1482 - 2011

Slotted Countersunkhead Tapping Screws
Suppliers(1)

ASME B 18.6.3 (H1A+T1A) - 2024

82° Slotted Flat Coutersunk Head Tapping Screws - Type AB (ABR)

ASME B 18.6.3 (H3A+T1A) - 2024

82° Slotted Undercut 82-deg Flat Countersunk Head Tapping Screws

ASME B 18.6.3 (T1+T40) - 2013

82° Slotted Flat Coutersunk Head Tapping Screws - Type AB (ABR) [Table 1+Table 40]

ASME B 18.6.3 (T9+T40) - 2013

82° Slotted Undercut 82-deg Flat Countersunk Head Tapping Screws [Table 9]

ASME B 18.6.5M (T8) - 2000 (R2010)

Metric slotted countersunk head tapping screws [Table 8]

ASME B 18.6.4 - 1998

Slotted Flat Countersunk Head Tapping Screws - Type B and BP

ASME B 18.6.4 - 1998

Slotted Flat Countersunk Head Tapping Screws - Type C

ASME B 18.6.4 - 1998

Slotted Flat Countersunk Head Tapping Screws - Type AB

ASME B 18.6.4 - 1998

Slotted Undercut Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table 13]

ASME B 18.6.4 - 1998

Slotted Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 13]

ASME B 18.6.4 - 1998

Slotted Undercut Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table 13]

ASME B 18.6.4 - 1998

Slotted 100° Flat Countersunk Head Tapping Screws - Type B and BP Thread Forming [Table VI1]

ASME B 18.6.4 - 1998

Slotted 100° Flat Countersunk Head Tapping Screws - Type AB Thread Forming [Table VI1]