10.9 12.9 grade track hex bolt head marking

Rockwell  Hardness:       35°-38°

Tensile Strength:               1160N/mm²

Grade/Material:                10.9-ASTM5140(40Cr)

Surface Treatment:         Phosphated; Galvanized; Black Oxide;Dacromet

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Step8. FAQ :

Q1: Why choose us?

A:  a.More than 10 years professional team in auto fastener industrial.

      b.Value for money, high quality and competive price.

      c.Fast delivery.

      d.Baostep-a strong brand, deliveries in over 60 countries

      e.Freely offer LCL service.Save time and money.

Q2: What`s your auto fastener guarantee ?

A: Strictly complying with quality management systems of ISO9001/TS16949.   

    If you have any problems concerning quality, we will offer you a refund or a replacement.

Q3: How many quantities about packaging for each item?

A: Without quantity limitation for inventory goods; more than 3000pcs/item for customization order.

Q4: How long is the date of delivery?

A: For inventory goods, we will deliver within 2 working days. For a customized order,30-60days.