30/20 Tooth T-bolt
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30/20 Tooth T-bolt

The 30/20 Tooth T-bolt surface adopts special multi-alloy co-permeation coating technology, which effectively avoids the contradiction between coating and anti-off when the coating thickness is 80um, and meets the 150-hour copper accelerated test, the neutral 1200-hour salt spray test and higher requirements.

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Product Description

30/20 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 special multi-alloy co-permeation coating technology, which effectively avoids the contradiction between coating and anti-off when the coating thickness is 80um, and meets the 150-hour copper accelerated test, the neutral 1200-hour salt spray test and higher requirements


2.Design Bearing Capacity of T Bolts of Different Material 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

30/20 M12

44.9 KN

27.2 KN

61.2 N·m

84N·m

31.6 KN

23KN

58.8 N·m

70N·m


3. National Building Materials Testing Centre.

Number

Testing projects

Detection methods

Unit

Technical requirements

Test results

Individual assessment


1


Impact test


GB/T1732-1993


/


No cracks, wrinkles and spalling in the test coating


There were no cracks, wrinkles and spalling on the coating


Qualified


2

Allowable sliding load test of single bolt along channel axis


GB/T3329-2013


KN


≥10


KN under 10 sliding loads


Qualified


3


Fire-resistant ageing test


GB/T9978.1-2008


/

No loss of bearing capacity within 90 min, no less than 1.8 KN of single point bearing tension

The single point bearing tensile force is 1.8 KN,90min After the fire resistance test, the T bolt and heavy object are not removed from the groove, and the bearing capacity of the groove is not lost


Qualified





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