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National standard 10.9 grade high strength fine tooth external six angle screw, fine buckle outside six angle bolt, young tooth screw M12

Authentic 10.9 grade fine teeth outside the six angle bolt blackening, specifications complete, affordable, authentic guarantee (due to the size of the weight is not the same, photographed before contact the seller to modify the freight, so as not to cause unnecessary losses)

price:USD$2.32
discount 70% in 2018-09-18 to 2018-09-20
price: USD$ 1.62
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
Minimum Order Quantity:6
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Note: please contact the customer service, and then pay the freight according to the actual weight.

GB6171 10.9级 高强度六角细牙螺母 六角细扣螺帽 幼牙螺母 M8-72GB6173 10.9级 六角细牙薄螺母 六角细扣扁螺母 幼牙薄螺帽M8-M64GB6176 10.9级  细牙加厚螺母 外六角细扣加厚螺帽 幼牙六角螺母GB97 8.8级平垫 发黑高强度垫片 垫圈 发黑平垫 平垫圈¢6-¢64GB93 8.8级弹垫 高强度弹垫 弹簧垫片 发黑弹垫 弹垫圈 M6~M64

Name: outer six corner bolt grade: 10.9 grade

Material: 40CR standard: GB5785/5786

Surface treatment: the process of quenching black products: heat treatment