GB /T 14 - 2013 Mushroom Head Square Neck Bolts

Unit: 毫米(mm)

Thread Size
d

P	Pitch
b ^②	Ref.	L≤125
		125＜L≤200
		L＞200
d_k	max=nominal size
	min
d_s	max
k₁	max
	min
k	max
	min
r	max
s	max
	min

0.80	1.00	1.25
16	18	22
/	/	28
/	/	/
13	16	20
11.9	14.9	18.7
5.48	6.48	8.58
4.1	4.6	5.6
2.9	3.4	4.4
3.1	3.6	4.6
2.5	3	4
0.4	0.5	0.8
5.48	6.48	8.58
4.52	5.52	7.42

Thread Length
b

①,ds_min≈Thread diameter
②,For nmoinal lengths L ≤ 75 mm and sizes d ≤ M12 the length of thread, b, may be the whole of the shank length up to the square neck.

GB /T 14 - 1998

Cup head square neck bolts with large head

GB /T 14 - 1988

Cup Head Square Bolts With Large Head - Grade C

GB 14 - 1976

Cup head square neck bolts with large head

DIN 603 - 2017

Cup Head Square Neck Bolts
Suppliers(3)

DIN 603 - 2010

Mushroom head square neck bolts
Suppliers(3)

DIN 603 - 1981

Mshroom head square neck bolts
Suppliers(3)

DIN 11015 - 1995

Agricultural Machinery - Flat Countersunk Square Neck Bolts With Short Square

ISO 8677 - 1986

Cup Head Square Neck Bolts With Large Head-Product Grade C

JIS B 1171 (AT1) - 1996

Cup head square neck bolts（Large size）[Table 1]

Q 192B

Cup head square neck bolts with large head

ASME/ANSI B 18.5 - 2012

Step Bolts,(Inch Series)

ASME/ANSI B 18.5 - 2008

Step Bolts

ASME/ANSI B 18.5.2.3M - 1998

Metric round head square neck bolts with large head

UNI 5732 - 1965

Cup square bolts with hexagon nut - ISO metric coarse thread - Finish C

UNI 5731 - 1965

Cup square bolts and bolts with square nut - ISO metric coarse thread - Finish C

NF E 27-351 - 1969

Round Head Square Neck Bolts - JAPY Type

BS 4933 - 1973

Metric Cup Square Bolts

CNS 4424 - 1981

Cup Square Bolts

CNS 4425 - 1981

Cup Square Bolts With Enlarged Head For Looms

CNS 4574 - 1981

Cover Bolts Type A

GOST 7802 - 1981

Increased cup head square shoulder bolts, product grade C

ASME B 18.5 - 2012 (2017)

Step Bolts,(Inch Series)

GB	GB /T 14
ISO	ISO 8677
DIN	DIN 603
ASME/ANSI	ANSI/ASME B 18.5.2.3M
UNI	UNI 5732
NF	NF E 27-351
Some of the above standards may be approximate equivalent. If there is any objection, the standard original shall prevail.