Fasteners quality 12.9

Fasteners quality 12.9

Higher head
Heads 20% higher than American Standard B 18.2.1.  Higher heads mean longer wear life and maximum holding for the nut.

SAE grade marks
The radial marks indicate the grade of SAE strength for better identification. Six marks on the head guarantee the quality grade 12.9 / 35-38 Rockwell (113/124 Kg./mm2)

Forged head
Provides a correct flow of the steel fibre reducing the fatigue points ensuring major resistance to bumps and an even distribution of the weight. The edges do not round off and the bolts can be reused. The washer sits perfectly below the head.

Laminated Thread
Laminated with the maximum precision BYG bolts and nuts provide a strong hold eliminating the risk of breakage.

Fine Grade Steel
The fine grade steel provides an even microstructure improving resistance and with a lower percentage of breakage.

Complete Fastening System
For better assurance and to get the maximum resistance and duration use BYG HD nuts and washers in combination with BYG fasteners.

BYG standard fasteners meet or exceed the requirements ISO 12.9:

• Pretensile strength 120.000 lb/pulg2
• Elastic load limit 150.000lb/pulg2
• Hardness: 33 to 39 Rockwell C (hexagonal fasteners)
• Hardness: 37 to 42 Rc (plow and track bolts)