M4-0.7 x 20mm Button Head Socket Cap Screws, 10.9 Grade Alloy Steel, Allen Socket Drive, Black Oxide Finish, Full Thread Quantity 50

M4-0.7 x 20mm Button Head Socket Cap Screws, 10.9 Grade Alloy Steel, Allen Socket Drive, Black Oxide Finish, Full Thread Quantity 50

Product Type: Button Head Socket Cap Screws. The button head scoket screws are 100% Class 10.9 Alloy Steel which offers a high level of chemical and corrosion resistance. Thread Pitch: 0.7mm; Exterior Finish: Black Oxide; Color: Black Package includes：50 Pcs x 10.9 Button Head Socket Cap Screws Button Head Socket Screws are great to have around for use in wood and wet environments. Size:M4 x 20mm (50 PCS)


1. What is a hexagon socket screw?

The outer edge of the head of the hexagon socket screw is round, and the middle is a recessed hexagon. It is usually used with a hexagon wrench. Commonly used in machinery, it mainly has the advantages of easy fastening, disassembly, and not easy to slip corners.


2. What is the application range of hexagon socket screws?

Hexagonal screws are widely used, ranging from household hardware, electrical products, mechanical equipment products, to the wind power industry, the aerospace industry, office equipment industry, the electronics industry, the communications industry, the shipbuilding industry, etc.


3. What are the grades of hexagon socket screws?

The performance grades of hexagon socket screw are divided into more than 10 grades, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which screw of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched, tempering), commonly known as high-strength screw, and the rest are commonly known as ordinary screw. According to the stainless steel material, there are 201, 304, and 316 stainless steel.

Notice: Please view the detailed information of the linked product for the specific size. Please purchase the appropriate size according to your needs.

Thread Diameter 4mm
Head Diameter 7.6mm
Head Height 2.2mm
Screw Length 20mm
Specifications: ISO 7380 / DIN 9427
High Quality Alloy Steel Grade 10.9


Package Included

50 x 10.9 Alloy Steel Grade Button Head Socket Bolts