Click Specification

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

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

Display drawing:

Thread Size
d

10#

12#

1/4

5/16

3/8

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	0.2500	0.3125	0.3750
18	16	14	14	12	12
0.183	0.198	0.262	0.277	0.359	0.387
2	2	3	3	4	4
0.110	0.125	0.139	0.154	0.196	0.225
0.087	0.102	0.116	0.131	0.174	0.203
0.250	0.312	0.312	0.375	0.500	0.562
0.244	0.305	0.305	0.367	0.489	0.551
0.312	/	0.375	0.438	/	/
0.305	/	0.367	0.428	/	/
0.272	0.340	0.340	0.409	0.545	0.614
0.340	/	0.409	0.477	/	/
0.110	0.120	0.155	0.190	0.230	0.295
0.096	0.105	0.139	0.172	0.208	0.270
1-1/4	1-3/8	1-5/8	1-13/16	1-13/16	1-7/8
0.056	0.062	0.071	0.071	0.083	0.083
0.980	1.140	1.300	1.500	1.500	1.500

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.

Send Inquiry

Similar Standards

1	[DIN EN ISO] DIN EN ISO 1479 - 2011	Hexagon Head Tapping Screws View Suppliers
2	[DIN] DIN 7976 - 1990	Hexagon head tapping screws View Suppliers
3	[ASME] 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]
4	[ASME] ASME B 18.6.4 - 1998	Regular And Large Hex Head Tapping Screws - Type B and BP Thread Forming [Table 39]
5	[ASME] ASME B 18.6.3 (Hex-VI-A) - 2013	Hexalobular Socket Hex Head with Type A Thread-Forming Tapping Screws [Table 30&42]
6	[ASME] ASME B 18.6.4 - 1998	Hex Washer Head Tapping Screws - Type B and BP Thread Forming [Table 40]
7	[ASME] 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]
8	[ASME] ASME B 18.6.4 - 1998	Hex Washer Head Tapping Screws - Type A Thread Forming [Table 40]
9	[ASME] ASME B 18.6.5M - 2000 (R2010)	Metric hexagon head tapping screws [Table 20]
10	[ASME] ASME B 18.6.3 (T29+T40) - 2013	Plain (Unslotted) and Slotted Regular and Large Hex Head Tapping Screws - Type AB and ABR
11	[ASME] ASME B 18.6.4 - 1998	Regular And Large Hex Head Tapping Screws - Type A Thread Forming [Table 39]
12	[ASME] 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]
13	[ASME] ASME B 18.6.4 - 1998	Regular And Large Hex Head Tapping Screws - Type C Thread Forming [Table 39]
14	[ASME] ASME B 18.6.4 - 1998	Regular And Large Hex Head Tapping Screws - Type AB Thread Forming [Table 39]
15	[ISO] ISO 1479 - 1983	Hexagon Head Tapping Screws
16	[ASME] ASME B 18.6.4 - 1998	Hex Washer Head Tapping Screws - Type C Thread Forming [Table 40]
17	[ASME] ASME B 18.6.3 (T30-I+T40) - 2013	Cross Recess Indented Regular and Large Hex Head Tapping Screws - Type AB and ABR
18	[ASME] 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]
19	[ASME/ANSI] ASME/ANSI B 18.6.3 - 2010	Machine Screw and Tapping Screw Nuts (Inch Seires)
20	[IFI] IFI 502 - 1982	Metric Hex Head Tapping Screws
21	[ASME] ASME B 18.6.4 - 1998	Hex Washer Head Tapping Screws - Type AB Thread Forming [Table 40]
22	[ISO] ISO 1479 - 2011	Hexagon Head Tapping Screws
23	[GB] GB 5285 - 1985	Hexagon Head Tapping Screws
24	[JIS] JIS B 1123 - 1996	Hexagon Head Tapping Screws
25	[NF] NF E 25-662 - 1994	Hexagon Head Tapping Screws
26	[UNI] UNI 6949 - 1980	Hexagon head tapping screws
27	[GB] GB /T 5285 - 2017	Hexagon Head Tapping Screws
28	[BS] BS 4174 - 1972	Hexagon Head Self-Tapping Screws [Table 21]
29	[YJT] YJT 4064 (WN1447C)	Hexagon Washer Head Tapping Screws [PT-K Thread]
30	[YJT] YJT 4063 (WN1446C)	Hexagon Head Tapping Screws [PT-K Thread]
31	[AS] AS /NZS 4402 - 1996	ISO metric hexagon head tapping screws
32	[CNS] CNS 4308 - 2000	Hexagon Head Tapping Screws