38/23 Tooth T-bolt
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38/23 Tooth T-bolt

The 38/23 Tooth T-bolt design bolt head can effectively prevent the bolt from being over-threaded, There is a notch mark on the end of the screw to facilitate correct installation and positioning. The 38/23 Tooth T-bolt surface adopts hot-dip galvanizing process, the thickness of the zinc layer is 55um, to ensure the smooth screwing of the nut and bolt.

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Product Description

38/23 Tooth T-bolt


1. Features and advantages

1. The diamond-shaped design of the bolt head can effectively prevent the bolt from being over-threaded

2. There is a notch mark on the end of the screw to facilitate correct installation and positioning

3. Multi-station cold heading process, sharp and full, stable performance, beautiful appearance

4.8.8 level mechanical properties, superior tensile, shear, fatigue, and fire resistance

5. The surface adopts hot-dip galvanizing process, the thickness of the zinc layer is 55um, to ensure the smooth screwing of the nut and bolt


2. Design bearing capacity value table of T-bolts with different thread diameters, materials and strength grades.

The Nrd is the tensile load value, the Vrd is the shear load value, Mrd is the bending resistance when the cantilever is subjected to transverse load, that is, the design value of bending moment


Bolt Type

Carbon steel 8.8 grade

Stainless steel (SUS316L) A4-80

Nrd tensile

Vrd of shear

Mrd of moment/single bolt

Tinst of torque

Nrd tensile

Vrd of shear

Mrd of moment/single bolt

Tinst of torque

38/23 M12

44.9 KN

27.2 KN

61.2 N·m

84N·m

31.6 KN

23KN

58.8 N·m

70N·m

38/23 M16

83.7 KN

50.5 KN

155.4 N·m

200N·m

58.8 KN

33KN

116.6 N·m

193N·m


3. National Building Materials Testing Centre.

Number

Testing projects

Detection methods

Unit

Technical requirements

Test results

Individual assessment


1


Fatigue test


TB/T 3329-2013


/


After 500,000 fatigue tests, groove and T bolts, groove

The failure load value of the connection with the anchor rod does not decrease by more than 5% compared specified minimum value


After fatigue test, the specimen was not damaged. A limit failure load of 23.4 KN,2.5 per cent lower than the specified minimum


Qualified





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