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Expansion bolts

Function:
Using lift form inclination to improve rub bond stress can reach better fixed effect of the expansion screw anchor. Expansion bolt type specification45, 50, 60, 70, 80, expansion bolts grade and its materials can be mainly classified as austenite A1, A2, A4, martensite and ferrite C1, C2, C4. For example, A2-70, "--" represents bolt material and 70 represents strength grade. The following is the full expansion bolt specification table. Bolt materials commonly are Q215, Q235, 25 and 45 steel. For important or special purpose of threaded connection15Cr, 20Cr, 40Cr, 15MnVB, 30CrMrSi, alloy steel with high mechanical properties would be good choice.

Specification	M6	M8	M10	M12	M14	M16	M18	M20
Length	50	60	70	80	100	100	150	150
	60	70	80	90	125	120	180	180
	65	80	90	100	150	125	200	200
	80	90	95	110		145	250	250
	100	100	100	120		150	300	300
		110	110	130		180
		120	120	150		200
			130	180		250
			150	200		300

Part of the specification parameter list:

Thread specifications	Length	Nominal length L	Expand tube size		Installation sizea	Drilling size		Connected pipe	Allowed static load
d	b	(Commonly used specification)	Diameter D	Length L1	(Reference)	Diameter	Deepth	Max thickness L2	Stretching resistance	Shearing resistance
(mm)									(N)
M6	35	65, 75, 85	10	35	3	10.5	40	L-50/-	2350	1770
M8	40	80, 90, 100	12	45	3	12.5	50	L-62/-	4310	3240
M10	50	95, 110, 125	14	55	3	14.5	60	L-75/L-83	6860	510
M12	52	110, 130, 150	18	65	4	19	75	L-90/L-100	10100	7260
M16	70	150, 175	22	90	4	23	100	L-122/L-135	19020	14120

Last: Shear studs Next: Torsional shear type high strength bolt

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