GB /T 820 - 2015 Raised Countersunk Head Screws with Cross Recess

Unit: 毫米(mm)

Thread Size
d

M1.6

M2.5

P	Pitch
a	max
d_k	theor.	max
	Actual	max=nominal size
		min
f	≈
k	max=nominal size
r	max
R	≈
x	max
Socket No.
M₁	Ref.
M₂	Ref.
Penetration depth	type H	max
		min
	type Z	max
		min

0.35	0.4	0.45
0.7	0.8	0.9
3.6	4.4	5.5
3	3.8	4.7
2.7	3.5	4.4
0.4	0.5	0.6
1	1.2	1.5
0.4	0.5	0.6
3	4	5
0.9	1	1.1
0	0	1
1.9	2	3
1.9	2.2	2.8
1.2	1.5	1.85
0.9	1.2	1.5
1.2	1.4	1.75
0.95	1.15	1.5

per 1000 units ≈ kg(7.85kg/cm3)

Thread Length
b

①,The thread diameter of the unthreaded portion is approximately equal to the pitch diameter or allowed to equal the major thread diameter
①,min

GB /T 820 - 2000

Raised Countersunk Head Screws (Common Head Style) with Cross Recess
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GB /T 13806.1 (C) - 1992

Cross Recessed Raised Countersunk Head Screws For Fine Mechanics
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GB 820 - 1985

Cross recessed raised countersunk head screws
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GB 974 - 1976

120°Cross recessed raised countersunk screws

DIN 966 - 1990

Cross Recessed Raised Countersunk Head Screws
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DIN 6929 (NE) - 2013

Raised Countersunk Head Screws

ISO 7047 - 2011

Rasied Countersunk Head Screws(Common Head Style) ，Grade A
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ISO 7047 - 1994

Countersunk Rasied Head Screws(Common Head Style) With Type H Or Type Z Cross Recess - Product Grade A
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JIS B 1111 (T12) - 2017

Cross Recessed Raised Countersunk Head Screws [Table 12]

JIS B 1111 (JA5) - 2017

Cross Recessed Raised Countersunk Head Screws

JIS B 1111 (T4) - 2006

Cross Recessed Raised Countersunk Head Screws [table 4]

JIS B 1111 (T4) - 1996

Cross Recessed Raised Countersunk Head Screws [table 4]

JIS B 1119 (2PC) - 1986

Spectacle Frames - Cross-recessed Slotted Pan Countersunk Machine Screws

Q 256

Cross recessed raised countersunk head screws

ASME/ANSI B 18.6.3 (T8) - 2010

80° Cross recessed raised countersunk head screws

ASME/ANSI B 18.6.7M - 1998

Metric cross recessed raised countersunk screws

ASME/ANSI B 18.6.7M - 1998

Metric PZ drives raised countersunk head screws

NF E 25-120 - 1994

Cross Recessed Raised Countersunk Head Screws, With Type H Or Type Z Cross Recessed - Product Grade A

BS 1981 - 1991

Recessed Raised Countersunk Head Machine Screws: Short Length

BS 1981 - 1991

Recessed raised Countersunk Head Machine Screws

BS 450 - 1958

Recessed 90° Raised-Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 3]

AS /NZS 1427 - 1996

ISO metric cross-recess raised countersunk screws [Table 2]

CNS 4561 - 1981

Cross Recessed Raised Countersunk Head Screws

GOST 17474 - 1980

Raised countersunk head screws (Cross Recessed), product grades A and B

KS B 1023 (T9) - 2016 (R2021)

Cross Recessed Raised Countersunk Head Screws

KS B 1023 (T4) - 2001

Cross Recessed Raised Countersunk Head Screws

DIN EN ISO 7047 - 2011

Raised Countersunk Head Screws (Common Head Style) with Type H or Type Z Cross Recess - Product Grade A
Suppliers(1)

ASME B 18.6.3 (H2B-I/H2B-IA) - 2024

Cross Recessed Raised Countersunk Head Screws - Type I and IA

ASME B 18.6.3 (H3D-I/H3D-IA) - 2024

Undercut Oval 82-deg Countersunk Head Screws, Type I & Type IA Recess

ASME B 18.6.3 (H4C) - 2024

Oval 82-deg Countersunk Trim Head Screws (ASTM F837 / F468)

ASME B 18.6.3 (T15) - 2013

Oval 82-deg Countersunk Trim Head Screws [Table 15] (ASTM F837 / F468)

ASME B 18.6.3 (T12-I/T12-IA) - 2013

Undercut Oval 82-deg Countersunk Head Screws, Type I & Type IA Recess

ASME B 18.6.3 (T8-I/T8-IA) - 2013

Cross recessed raised countersunk head screws - Type I and IA [Table 7&8]

QJ 2378 - 1992

Countersunk raised head screws with cross recess

Jiangsu BofanKe Precision Metal Technology Co., Ltd.
Contact:	Director Tang
Cellphone：	86-15298892886 86-15262400870
email：	syjgjsz@163.com
Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm

GB	GB /T 820
ISO	ISO 7047
DIN	DIN EN ISO 7047
Some of the above standards may be approximate equivalent. If there is any objection, the standard original shall prevail.