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

Unit:

Thread Size
d

10#

12#

d	Nominal Size
PP
M	Ref.
Socket No.
P	max
	min
s₁	Regular Head	max
		min
s₂	Large Head	max
		min
e₁	Regular Head	min
e₂	Large Head	min
k	max
	min
L₀ ^④	Nominal
Y ^④	Fully Threaded	max
b ^④	Thread Length (Long screws)	min

0.1640	0.1900	0.2160
18	16	14
0.183	0.198	0.262
2	2	3
0.110	0.125	0.139
0.087	0.102	0.116
0.250	0.312	0.312
0.244	0.305	0.305
0.312	/	0.375
0.305	/	0.367
0.272	0.340	0.340
0.340	/	0.409
0.110	0.120	0.155
0.096	0.105	0.139
1-1/4	1-3/8	1-5/8
0.056	0.062	0.071
0.980	1.140	1.300

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.

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 (H9A+T1A) - 2024

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

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 (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]