Factory Supply High Strength Hex Bolt DIN912 Gr12.9 Socket Cap Screws

Product Description

Factory supply High Strength hex bolt gr 12.9 black socket head cap screws
Product Parameters

Material	Alloy Steel
Grade	8.8, 10.9, 12.9
Finish	Plain(Black oxide), Zinc Plated(White/Yellow), H.D.G and etc.
Thread	Metric,UNC,UNF,BSW
Standard	ISO, DIN, ASME, JIS, BS and Non-standard
Packing	1. Bulk in cartons (25-30kg Max.)+wooden pallet 2. Small Boxes into outer carton + wooden pallet 3. According to customer special demand
LeadTime	30-45 work days after order confirmed

Manufacturing Process
How to make a socket head cap screw ?

* After acid cleaning,we will delivery to the wire Drawing workshop for Drawing.
* Then transfer to the cold heading machine to make the hexagon head.(here we can do the head marking, Knurling or not Knurling here). if over M24, our machine will very biggest, you see~~

socket head cap screw DIN912 before thread rolling (below picture)
Thread rolling (below pictures)

* Then send to the heat treatment workshop to do the most important step--Heat treatment and with black.

And for Znic goods we will do it on plating factory.
Finish, let's do the test for Quality Checking!!!
HRC Test

HRC PERFECT!! so we can send the free samples to you to check the quanlity always if you need!
Packaging & Shipping
Package: 25kg bulk packing / small box inner carton
Label: we can follow customer requirements.
Shipment port: SHANGHAI
Company Profile
We,Hunan Gurth Technology Co., Ltd., is a professional manufacturer for fasteners with 2 factories in Wenzhou and Hunan bases and a number of experts and technicians engaged in hardware industries for more than 20 years. We focus on fasteners, our main products :
[ Socket head cap screw DIN912 8.8,10.9,12.9 ]
[ Set screw Din916 DIN913,DIN914 ]
[ Flat cap screw DIN7991 ]
[ Button cap screw ISO7380 ]
[ Hex bolts DIN933,DIN931 8.8,10.9,12.9 ]
[ Flange bolts DIN6921 ]
[ Nut DIN934,DIN982,DIN985,DIN6923 ]
[ Anchor ]
[ Rod thread ]
[ Washer ]
Through the years, we are consistently committed to supporting clients with better quality and competitive price.