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Guardrail Bolts are total four items:Waist Neck Guardrail Bolt ; Tenon Neck Guardrail Bolt; Square Neck Guardrail Bolt; Egg Neck Guardrail Bolt;
Material: Steel, stainless steel A2 or stainless steel A4. Note: The nut grade must always be the same or higher than the bolt grade, i.e. bolts with grade 8.8 are always paired with nuts grade 8 or higher, but never less.
DIN 6797 J are internal toothed washers that can guarantee discreet locking, in particular on non-flat bearing surfaces.
The Square Head Bolt is convenient for the wrench to jam or rely on other parts to prevent rotation. It can also be used in parts to adjust the position for relatively rough structures. And it can be an ideal facility used on rough structures in order to make the machine in good condition, with high and reliable performance.
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