DIN912 Hexagon Socket Cap Screw M2.5-M20

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Product Description

Product Name	DIN912 Hexagon Socket Cap Screw M2.5-M20
Material	Carbon Steel, Stainless Steel 201/ 304/ 316 or others.
Size	M2.5--M20
Standard Model	DIN ANSI JIS ASTM
Min Order	1000piece/ pieces

Packaging & Shipping

Packing	Inner Box + Carton Box + Pallet or Under Your Requirement
Supply capacity	10000000 piece/ pieces per month
Delivery time	5~20 days after deposit
Export market	Asia, America, Europe, Africa, markets.

Our Services

1. Reliable Supplier
2. High Quality
3. Standard Producing Technology
4. Competitive Factory Price
5. Fast Delivery

1. Reliable Supplier

2. High Quality

3. Standard Producing Technology

4. Competitive Factory Price

5. Fast Delivery

Product Picture：

DIN912 Hexagon Socket Cap Screw M2.5-M20

Q: Why the screw thread more closely, spin into the more effort?: This is due to the spiral angle of the thread becomes smaller, the pitch of the thread, the lead becomes smaller.

Q: Why do you have to add a spring washer when it comes to the role of ah ah ah: If the screw on a spring washer, screw and screw hole fixed, due to the role of the spring washer spring will greatly reduce the possibility of loosening screws, falling off

Q: Do not use self tapping screws: Self tapping screws are needed to use the gasket.A part between a connector and a nut. A flat metal ring is generally used to protect the surface of the connecting piece from the nut.

Q: How do you choose the appropriate gasket for bolt or screw connection?: Mainly depends on your needs, such as the bolt is M10, you have to choose the matching. A variety of information can be found from the hardware manual.

Q: When do flat washers use GB95 when using GB97.1?: Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolation, to prevent loose or disperse pressure. Such components are used in many materials and structures to perform similar functions. Due to the limitation of the material and the process of the threaded fastener, the supporting surface of the bolt and the like is not large, so that the surface of the connecting piece is protected by reducing the compressive stress of the bearing surface.

Q: In the fastener industry, 1018 refers to what material: Low-carbon steel. Domestic in accordance with the Japanese standard to create the SWRCH18A. (JIS G 3507) Carbon C: 0.15 to 0.20 Silicon Si: 0.17 to 0.37 Mn Mn: 0.60 to 0.90 Phosphorus P: ≤0.030 Sulfur S: ≤0.035 The carbon content of the material is relatively low and can not be quenched and tempered. Used for cold piers to make low-grade screws. Pull up the strength of 450Mpa.

Q: How to remove mildew on the rubber washer: Solution：1, activated carbon with gauze wrapped and then put;2, orange or orange peel or lemon cut into small pieces, put into steam for a while;3, is not in line with the onion steamed but the effect is poor.

Q: For the commonly used standard parts, for some of the quality of good or bad, how to distinguish,: If it is important, random to do one or two destructive pull test, their own press with a simple tooling, pay attention to safety, if their own, to the physical and chemical test units or heat treatment of the brothers can do. You can also go to the supplier to monitor the sampling of such a similar test (contract agreed).

Q: Who knows who invented the screw?: Greek mathematician Archimedes invented the thread, but until the 15th century only appeared the first screw, do not know who is its inventor. 1550 years with wood screws, until 1774 only invented a screwdriver. In 1936, Henry M. Philips applied for a patent for the screws of the crosshead head

Q: What is the size of the screw for the wall power switch installation: Concealed switch generally M5 × 30 semi-round head screws, you can also use M4 × 30 tapping screws. Ming installed switch is used M5 expansion with M5's self-tapping screws.

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