ASME B 18.6.3 (H9A+T1A) - 2024 Plain (Unslotted) and Slotted Regular and Large Hex Head Tapping Screws - Type AB and ABR

Unit:

Thread Size
d

d	Nominal Size
PP
s₁	Regular Head	max
		min
s₂	Large Head	max
		min
e₁	Regular Head	min
e₂	Large Head	min
k	max
	min
n	max
	min
t	max
	min
L₀ ^④	Nominal
Y ^④	Fully Threaded	max
b ^④	Thread Length (Long screws)	min

0.0730	0.0860	0.0990
42	32	28
0.125	0.125	0.188
0.120	0.120	0.181
/	/	/
/	/	/
0.134	0.134	0.202
/	/	/
0.044	0.050	0.055
0.036	0.040	0.044
/	/	/
/	/	/
/	/	/
/	/	/
9/16	5/8	3/4
0.024	0.031	0.036
0.440	0.520	0.590

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.
⑤,A slight rounding of all edges and comers of the hex surfaces of indented hex heads shall be permissible, provided the diameter of the bearing circle is equal to no less than 90% of the specified minimum width-across-flats dimension.

GB /T 5285 - 2017

Hexagon Head Tapping Screws

GB 5285 - 1985

Hexagon Head Tapping Screws

IFI 502 - 1982

Metric Hex Head Tapping Screws

DIN 7976 - 1990

Hexagon head tapping screws
Suppliers(1)

ISO 1479 - 2011

Hexagon Head Tapping Screws

ISO 1479 - 1983

Hexagon Head Tapping Screws

JIS B 1123 (JA3) - 2015

Hexagon Head Tapping Screws [JA3]

JIS B 1123 - 2015

Hexagon head tapping screws (Type C ,F and R)

JIS B 1123 (AT1) - 1996

Hexagon head tapping screws (Type C and type F)

JIS B 1123 (AAT1) - 1996

Hexagon Head Tapping Screws [Annex Attached Table 1]

ASME/ANSI B 18.6.3 - 2010

Machine Screw and Tapping Screw Nuts (Inch Seires)

UNI 6949 - 1980

Hexagon head tapping screws

NF E 25-662 - 1994

Hexagon Head Tapping Screws

BS 4174 - 1972

Hexagon Head Self-Tapping Screws [Table 21]

AS /NZS 4402 - 1996

ISO metric hexagon head tapping screws

CNS 4308 - 2000

Hexagon Head Tapping Screws

YJT 1020 (FBS)

YJT 4063 (WN1446C)

Hexagon Head Tapping Screws [PT-K Thread]

YJT 4064 (WN1447C)

Hexagon Washer Head Tapping Screws [PT-K Thread]

DIN EN ISO 1479 - 2011

Hexagon Head Tapping Screws
Suppliers(1)

ASME B 18.6.3 (H9B-I+T1A) - 2024

Cross Recess Indented Regular and Large Hex Head Tapping Screws - Type AB and ABR

ASME B 18.6.3 (H9B-VI+T1A) - 2024

Hexalobular Socket Hex Head with Type AB and ABR Thread-Forming Tapping Screws

ASME B 18.6.3 (H9C-I+T1A) - 2024

Recess Dimensions for Type I Nonindented Regular and Large Hex Head Tapping Screws - Type AB and ABR

ASME B 18.6.3 (H9B-VI+T1B) - 2024

Hexalobular Socket Hex Head with Type B and Type BP Thread-Forming Tapping Screws

ASME B 18.6.3 (H9B-VI+T1D) - 2024

Hexalobular Socket Hex Head with Type A Thread-Forming Tapping Screws

ASME B 18.6.3 (H9B[L]-VI+T1B) - 2024

Hexalobular Socket Large Hex Head with Type B and Type BP Thread-Forming Tapping Screws

ASME B 18.6.3 (H9B[L]-VI+T1D) - 2024

Hexalobular Socket Large Hex Head with Type A Thread-Forming Tapping Screws

ASME B 18.6.3 (T30-VI+T40) - 2013

Hexalobular Socket Hex Head with Type AB and ABR Thread-Forming Tapping Screws [Table 30&40]

ASME B 18.6.3 (Hex-VI-B/BP) - 2013

Hexalobular Socket Hex Head with Type B and Type BP Thread-Forming Tapping Screws [Table 30&41]

ASME B 18.6.3 (Hex-VI-A) - 2013

Hexalobular Socket Hex Head with Type A Thread-Forming Tapping Screws [Table 30&42]

ASME B 18.6.3 (Hex[L]-VI-B/BP) - 2013

Hexalobular Socket Large Hex Head with Type B and Type BP Thread-Forming Tapping Screws [Table 30&41]

ASME B 18.6.3 (Hex[L]-VI-A) - 2013

Hexalobular Socket Large Hex Head with Type A Thread-Forming Tapping Screws [Table 30&42]

ASME B 18.6.3 (T29+T40) - 2013

Plain (Unslotted) and Slotted Regular and Large Hex Head Tapping Screws - Type AB and ABR

ASME B 18.6.3 (T30-I+T40) - 2013

Cross Recess Indented Regular and Large Hex Head Tapping Screws - Type AB and ABR

ASME B 18.6.3 (T31-I+T40) - 2013

Recess Dimensions for Type I Nonindented Regular and Large Hex Head Tapping Screws - Type AB and ABR

ASME B 18.6.5M (T20) - 2000 (R2010)

Metric hexagon head tapping screws [Table 20]

ASME B 18.6.4 - 1998 (R2005)

Regular And Large Hex Head Tapping Screws - Type B and BP Thread Forming [Table 39]

ASME B 18.6.4 - 1998 (R2005)

Regular And Large Hex Head Tapping Screws - Type C Thread Forming [Table 39]

ASME B 18.6.4 - 1998 (R2005)

Regular And Large Hex Head Tapping Screws - Type AB Thread Forming [Table 39]

ASME B 18.6.4 - 1998 (R2005)

Regular And Large Hex Head Tapping Screws - Type A Thread Forming [Table 39]

ASME B 18.6.4 - 1998 (R2005)

Hex Washer Head Tapping Screws - Type B and BP Thread Forming [Table 40]

ASME B 18.6.4 - 1998 (R2005)

Hex Washer Head Tapping Screws - Type C Thread Forming [Table 40]

ASME B 18.6.4 - 1998 (R2005)

Hex Washer Head Tapping Screws - Type AB Thread Forming [Table 40]

ASME B 18.6.4 - 1998 (R2005)

Hex Washer Head Tapping Screws - Type A Thread Forming [Table 40]