DIN7991 Hex Countersunk Socket Flat Head Cap Screw Full Thread Black Oxide

• Material: Stainless Steel
• Type: Countersunk Head
• Groove: Hexagon
• Connection: Common Bolt
• Head Style: Counter Sunk Bolt
• Standard: DIN, ANSI
• Model NO.: DIN7991
• Grade: 4.8,6.8,8.8,10.9,12.9
• Surface Treatment: Black Phosphated,Zinc Plated,HDG,Plain and etc
• Transport Package: Bulk Packing or Customized
• Specification: various size or customized
• Trademark: RL
• Origin: Zhejiang
• HS Code: 73181590
• Production Capacity: 1000 Ton/Tons Per Month

Product Description

DIN7991 Countersunk Flat Head Hexagon Socket Cap Screw Grade 12.9 Black Oixde

A screw used for the relative position of a stationary machine. When used, the fastening screw is screwed into the screw hole of the mechanical parts to be fixed, and the end of the screw is pressed on the surface of the other mechanical parts, even if the former piece is fixed on the rear parts. Slotted and hexagon tightening screws are used for parts which are not exposed to the nail head, and the square head fastening screws are suitable for the parts which are allowed to be exposed by the nail head. The clamping force of the screws is the minimum of slotted screws, the largest square head screws, and the hexagon screws are centered. The taper end screws are suitable for the mechanical parts with small strength, and the taper end screws are suitable for the parts of the concave pits on the pressing surface. To increase the capacity of the transfer load, the flat-end screws (the pressure surface should be flat) and the concave end screws, are suitable for the hardness of the larger or often adjust the position of the parts; Long cylindrical end screws apply to tubular shafts (thin-walled pieces, The cylindrical end enters the hole in the tubular shaft to convey a larger load, but it should be used with a device to prevent loose screws.

Material	Carbon Steel/ Alloy Steel/ Stainless Steel
Surface Treatment	Zinc Plated, Black Oxide, Nicked, HDG, Chromat, Polished
Grade	4.8/ 8.8/ 10.9/ 12.9 Ect
Size	M2-M64
Length	2-300mm
Thread	Coarse, Fine
Standard	DIN, ASME, ASNI, ISO, JIS
Packing	Bubble Bags, Carton, Pallet
Application	Building Industry Machinery

Q1.What is your main products?
A1:Our main products are fasteners and hardware parts: bolts, screws, rods, nuts, washers,anchors,rivets in steel and stainless
steel etc.Hardware parts such as solar panel hardware,HVAC accessores and floor drains parts.
Q2. How to ensure that every process's quality?
A2:Jiaxing Relia owns its professional laboratory to make sure each shipment we made with qualified products.
Q3.How long is your delivery time?
A3:Our delivery time is generally 15 to 30 days, according to the quantity of order.
Q4.The anchor bolt do you have in stock ?
A4:Yes ,we have.
Q5.Can you provide a sample?
Q5:Yes, we can provide free sample.