Square Head Flange Round Thread Bolts

Type: Track Train
Size: Dia.25mm
Length: 450mm to 600mm
Surfacing Finishing: Zinc Yellow, Hot Dig Galvanized
Transport Package: Woven Bag
Specification: SGS, CRCC
Samples:
US$ 0/Piece 1 Piece(Min.Order)
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Basic Info.

Model NO.
Dia. 25
Trademark
ZBRF
Origin
China(Mainland)
Production Capacity
16000tons

Product Description

Product Description

Material
 
carbon steel

Grade
 
5.6 5.8 8.8

Tensile Strength
        ≥500        ≥520  ≥ 800   ≥ 830

Yield strength
        ≥300          ≥420  ≥ 640    ≥ 660

Elongation
        ≥20             ≥ 12      ≥  12

Reduction of area
 
    ≥ 52      ≥  52

Hardness
        23-34

Surface finish
Zinc yellow, hot dig galvanized 

Size
Dia. 25mm, length from 450mm to 600mm

Application
Tunnel cocrete rings connecting
We produce Square head Flange round thread bolts with high quality and strength.
Zhongbo Railway Fastening Company is a leading Chinese manufacturer of rail fastening and rail joint bar.

Zhongbo, as a specialized rail fastener manufacturer, provides a complete line of products, including rail fastening, anchor, rail joint, rail clip, rail screw, anchor bolt, rail clamp plate, rail fishplate, and fishplate bolt for connecting rail tracks.

We also make rail fastenings for crane rail and elevator guide rail, along with other related products. We manufacture according to GB/TB (Chinese national standards and railway standards), AREA, UIC, BS, DIN, ASTM, and AS standards.

Our products are mainly made through hot forging.

The threads of rail screw spikes are made by hot rolling with special threading machines.

We produce metric threads, BS, BSW, TR thread, or round threads.

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