Products

There are mainly 4 kind of surface treatment: Plain, Black, Electronical galvanised and Hot dip galvanized Hex nuts.

Their performance and appearance will be better than the casting nuts.
General material is 1045, 42CrMo etc.
General thread profiles is T thread, R thread, G thread, metric...

​A square nut is a four-sided nut. Square nuts are typically mated with square-headed bolts. Square nuts are used along with flat washers in order to avoid damage from its sharp edges and helps to...

Give a good granularity of angles for a tool to approach from (good in tight spots).
More (and smaller) corners would be vulnerable to being rounded off.

Spherical Washers are designed to aid even fastening between parts with irregular alignment. The top washer features a convex spherical radius for aligning in the con-caved bottom washer. Both...

Material: Mild steel round bar
Surface treatment: Plain
Free from flash and surface defects

#1045 steel
Zinc plated
Sharp edges deburred

Dome nuts have a circular flange on one end that creates a large, even clamping surface between the nut and workpiece. They are used with bottom washers to reduce stress on threads caused by...

Rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity.

The Underground expansion shell holds in any rock strata which is sufficiently competent to provide an adequate anchorage.

As the professional manufacture, we would like to provide you Underground Mining Roof Support Expansion Shell. And we will offer you the best after-sale service and timely delivery.

Expansion shell can provide prestressing to rock. It is very convenient and easy to install.