Square Head Flange Round Thread Bolts

• Customization: Available
• Type: Track Train
• Size: Dia.25mm
• Model NO.: Dia. 25
• Length: 450mm to 600mm
• Surfacing Finishing: Zinc Yellow, Hot Dig Galvanized
• Transport Package: Woven Bag
• Specification: SGS, CRCC
• 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.