Click Specification

Cross Recessed Big Flat Head Self-Tapping Screws

ASME B 18.6.4 - 1998

Display drawing:

Screw Thread
d

10#

1/4

5/16

3/8

7/16

1/2

PP
d	Nominal Diameter
d_k	max
d_k	min
k	max
k	min
M	Ref.
t	Ref.
N	Ref.
Socket No.
Penetration depth	max
Penetration depth	min

56	48	40	40	32	32	24	20	18	16	14	13
0.0860	0.0990	0.1120	0.1250	0.1380	0.1640	0.1900	0.2500	0.3125	0.3750	0.4375	0.5000
0.194	0.226	0.257	0.289	0.321	0.384	0.448	0.573	0.698	0.823	0.948	1.073
0.180	0.211	0.241	0.272	0.303	0.364	0.425	0.546	0.666	0.787	0.907	1.028
0.053	0.061	0.069	0.078	0.086	0.102	0.118	0.150	0.183	0.215	0.248	0.280
0.044	0.051	0.059	0.066	0.074	0.088	0.103	0.133	0.162	0.191	0.221	0.250
0.098	0.104	0.106	0.122	0.152	0.166	0.182	0.256	0.346	0.376	0.408	0.438
0.050	0.058	0.060	0.076	0.072	0.086	0.102	0.130	0.180	0.214	0.244	0.276
0.018	0.018	0.018	0.019	0.027	0.029	0.030	0.033	0.059	0.063	0.068	0.072
1	1	1	1	2	2	2	3	4	4	4	4
0.052	0.059	0.062	0.078	0.073	0.088	0.104	0.126	0.173	0.206	0.237	0.268
0.034	0.042	0.044	0.060	0.048	0.063	0.079	0.101	0.148	0.182	0.212	0.243

①,Material
1）Tapping screws are normally fabricated
from carbon steel of high quality，such as AISI 1016, 1018, 1019, 1021, 1022, or
1024, either killed or capped but not rimmed.
2）also be made from corrosion resistant steel,
brass, monel, and aluminum alloys. The materials and
properties shall be as mutually agreed upon between
the manufacturer and purchaser.

Similar Standards

1	[DIN] DIN 7500 (CE) - 1995	Cross recessed pan head thread rolling screws View Suppliers
2	[DIN] DIN 7500 (CE) - 2007	Cross Recessed Pan Head Thread Rolling Screws View Suppliers
3	[DIN] DIN 7500 (C) - 1984	Cross recessed pan head thread rolling screws View Suppliers
4	[GB] GB /T 6560 - 1986	Cross Recessed Pan Head Thread Forming Screws View Suppliers
5	[GB] GB /T 6560 - 2014	Cross Recessed Pan Head Thread Rolling Screws View Suppliers
6	[UNI] UNI 8112	Cross Recessed Round Head Forming Screws