Purchase Qty. Reference FOB Price
2,000-9,999 Pieces US$3.15
10,000+ Pieces US$2.85
Product Description
high quality curve Spear tunnel Bolt for concrete ring Application:Permanently fix concrete tunnel segment Material: Carbon steel or stainless steel----Q235, 35#, 45#, 35CrMo, 42CrMo, 40Cr etc. Specification:Complete range from M16 to M30 diameters without Length limit. ...