GB /T 70.3 - 2023 Hexagon Socket Countersunk Head Screws with Reduced Loadability

Unit: 毫米(mm)

Thread Size
d

M2.5

P	Pitch
b	Ref.
d_k	Theoretical	max
	Actual	max
		min
d_s	max
	min
e ^①	min
k	Ref.	max
		min
r	min
s	Nominal Size
	max
	min
t	max
	min
Minimum tensile load(N)	8.8^②
	10.9^②
	12.9^②
	50^③
	70^③
	80^③

0.4	0.45	0.5
/	/	18
4.7	5.88	6.72
4.09	5.08	5.81
3.7	4.8	5.54
2	2.5	3
1.86	2.36	2.86
1.5	1.733	2.303
1.35	1.69	1.86
1.13	1.408	1.522
0.1	0.1	0.1
1.3	1.5	2
1.36	1.56	2.08
1.32	1.52	2.02
0.85	1.15	1.25
0.75	1	1.1
1330	2180	3220
1730	2820	4180
2020	3310	4910
830	1360	2010
1160	1900	2810
1330	2180	3220

Thread Length
b

①,e mim=1.14 S min
①,ref.
②,80% of the values for F_m,min as specified in GB/T 3098.1.
③,80% of the values for F_m,min as specified in GB/T 3098.6.
④,a ≤ 2P.

GB /T 70.3 - 2008

Hexagon Socket Countersunk Head Screws
Suppliers(1)

GB /T 70.3 - 2000

Hexagon Socket Countersunk Head Screws
Suppliers(1)

IFI 535 - 1982

Metric Socket Countersunk Head Cap Screws

DIN 7991 - 1986

Hexagon Socket Countersunk Head Cap Screws
Suppliers(6)

ISO 10642 - 2019

Hexagon Socket Countersunk Head Screws With Reduced Loadability
Suppliers(2)

ISO 10642 - 2004

Hexagon Socket Countersunk Head Screws
Suppliers(2)

ISO 10642 - 1997

Hexagon socket countersunk head screws
Suppliers(2)

JIS B 1194 - 2006

Hexagon Socket Countersunk Head Screws

Q 250

Hexagon socket countersunk head screws

ASME/ANSI B 18.3 - 2003

Spline socket flat countersunk head cap screws

ASME/ANSI B 18.3.5M - 1993

Metric hexagon socket countersunk head screws

ASME/ANSI B 18.3.5M - 1986

Metric hexagon socket countersunk head screws

ASME/ANSI B 18.3.5M - 1986 (R2008)

Metric Hexagon Socket Countersunk Head Cap Screws (ASTM F835M / F879M / A1-70)

UNI 5933 - 1988

Hexagon Socket Countersunk Head Screws - ISO Metric Coarse Pitch Thread - Product Grade A

NF E 25-146 - 2004

Hexagon Socket Countersunk Head Screws

BS 4168-8 - 1982

Metric Hexagon Socket Countersunk Head Screws

BS 2470 - 1973

Hexagon Socket Countersunk Head Screws - Unified Thread

CNS 4558 - 1981

Hexagon Socket Countersunk Head Screws

DIN EN ISO 10642 - 2020

Hexagon Socket Countersunk Head Screws
Suppliers(6)

DIN EN ISO 10642 - 2013

Hexagon socket countersunk head screws
Suppliers(6)

DIN EN ISO 10642 - 2004

Hexagon Socket Countersunk Head Screws
Suppliers(6)

IS 6761 - 1994 (R2004)

Countersunk Head Screws With Hexagon Socket

ASME B 18.3 - 2012

Hexagon Socket Flat Countersunk Head Cap Screws [Table 8] (ASTM F835 / F879)

ASME B 18.3 - 2003 (R2008)

Hexagon Socket Flat Countersunk Head Cap Screws

Suzhou Yongchuang Fastener Factory
Contact:	Mr. Tang
Cellphone：	+86-15298892886
QQ：	546348066
email：	syjgjsz@163.com
Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm

GB	GB /T 70.3
ISO	ISO 10642
DIN	DIN EN ISO 10642
UNI	UNI 5933
Some of the above standards may be approximate equivalent. If there is any objection, the standard original shall prevail.