Black Zinc Plated Screws Round Head With Washer Triple Set , Cross Slotted Pan Head Screw

Iron Plated Black Zinc Round Head With Washer Triple Set Screw ,Pan Head Cross Slot Flat Spring Washer Combination Screw

Iron-plated black zinc round head with washer triple set screw,
Pan head cross slot flat spring washer combination screw bolt M4-M8

Standard

GB/T 9074.11-1988

material

Plain carbon steel

Surface treatment

Black zinc plating

Strength class

Class 4.8

Head shape

Round head

Product name: black zinc plated screw combination

Product specifications: Complete specifications

Product standard: National standard

Material: plain carbon steel

Surface treatment: black zinc plating

Packing instructions: Bag/box



 

Standard manufacturing process:
The standard manufacturing process is not easy to appear in the installation process,
which greatly saves the installation time.

Spiral thread: the surface is smooth and flat,
the thread is sharp and the tapping speed is fast,
it is not easy to lose teeth,
and it is not easy to be pulled into a jack.

Smooth and no burrs: smooth and smooth surface without burrs, quality workmanship,
durable, not easy to slip wire is not easy to slip.

Scope of use: construction engineering, mechanical equipment, rail transit, shipbuilding