Stainless steel screws characteristics and anti-loosening solutions

Stainless steel screws characteristics and anti-loosening solutions

(1) Mechanical properties

Stainless steel screws, as the name suggests, must be made of stainless steel screw wire pier beating after rolling a suitable tooth thread screws. And stainless steel screws have a lot of properties related to the stainless steel material. Considering the performance and organization of stainless steel, understand the performance of stainless steel material. Thus, stainless steel has good mechanical properties such as anti-rust, anti-corrosion, and high-temperature resistance. The stainless steel screws also certainly have these good mechanical properties, with the stainless steel material material more and more excellent. The screw industry produced by the mechanical properties of stainless steel screws is getting better and better. Anti-rust, corrosion resistance, high temperature, and high pressure are getting stronger and stronger.

Same-Size Thread 18-8 Stainless Steel Shoulder Screws: With threads the same diameter as the shoulder, these screws can handle heavy loads. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. They’re often used to guide or align components and as an axle or pivot point.

Black-oxide stainless steel screws have a matte-black finish.

18-8 Stainless Steel Thread-Locking Shoulder Screws: A locking element on the threads adds friction to resist loosening. These 18-8 stainless steel shoulder screws have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. They’re often used to guide or align components and as an axle or pivot point.

Stainless Steel Hex Head Shoulder Screws: Stainless steel shoulder screws have excellent corrosion resistance in most environments. Also known as wheel and axle bolts, these shoulder screws have a hex head that can be gripped with a wrench. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment.

(2)Physical properties

Stainless steel and carbon steel physical property data comparison, carbon steel density is slightly higher than the ferritic and martensitic stainless steel and somewhat lower than the austenitic stainless steel; resistivity according to carbon steel, ferritic, martensitic and austenitic stainless steel sorting increasing; coefficient of linear expansion of the size of the order of magnitude is also similar to austenitic stainless steel is the highest and the carbon steel is the smallest; carbon steel, ferrite and martensitic stainless steel magnetic, austenitic Stainless steel is non-magnetic, but its cold work hardening into a martensitic phase transition will produce magnetic, heat treatment can be used to eliminate this martensitic organization and restore its non-magnetic. Austenitic stainless steel has the following characteristics compared with carbon steel:

1. High rate of electro-negativity, about five times that of carbon steel.

2. Significant coefficient of linear expansion, 40% larger than carbon steel, and with the increase in temperature, the value of the coefficient of linear expansion of stainless steel screws is also correspondingly higher.

3. Low thermal conductivity, about 1/3 of carbon steel.

(3) Mechanical properties

Whether stainless steel plate or heat-resistant steel plate, austenitic steel plate has the best overall performance, both in terms of sufficient strength and plasticity; at the same time, the hardness is not high, which is also one of the reasons they are widely used. Austenitic stainless steel, with the vast majority of other metal materials, is similar in its tensile strength, yield strength, and hardness with the lowering of the temperature and increase; plasticity with the lowering of the temperature and decrease. Its tensile strength at a temperature of 15 ~ 80 ° C range of growth is more uniform. More importantly: stainless steel screws with a reduction of temperature, their impact toughness decreases slowly, and there is no brittle transition temperature. So, stainless steel can maintain sufficient plasticity and toughness at low temperatures.

Stainless Steel Socket Head Screws with Split Lock Washer: Screws are 18-8 stainless steel for good chemical resistance. They may be mildly magnetic. Also known as Sems screws, they have a permanently attached but freely rotating split lock washer that adds tension to resist loosening from vibration. All screws meet ASTM F837 specifications and testing requirements for material quality. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

18-8 Stainless Steel Thread-Locking Socket Head Screws: Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. A thread locker bonded to the threads adds friction to resist loosening from vibration. Dimensions meet ASME B18.3 or ISO 4762 (formerly DIN 912) specifications， Length is measured from under the head.

Screws with a nylon patch are reusable, but their holding power lessens with each use. Screws with an epoxy adhesive provide a permanent bond; once tightened, the epoxy expands to seal the gaps between the mating threads. Metric screws are also known as A2 stainless steel screws.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

18-8 Stainless Steel Button Head Hex Drive Screws: 18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head. Passivated stainless steel screws provide added protection against oxidation and corrosion.

(4) Heat resistance

Heat resistance refers to high temperatures. Antioxidant or corrosion resistance to gaseous media is a performance of thermal stability, while both have sufficient strength, which is thermal strength.

With the customer's production of products and materials required more and more high, product materials used in the screw requirements are also more and more high. In the face of harsh environments in the product material and special occasions, more and more use of stainless steel screws of high-quality mechanical properties. Thus selected stainless steel screws， Requirements are higher and higher; the stainless steel screw material is also higher and higher. So a lot of ordinary stainless steel screws SUS201 are replaced by stainless steel SUS304 screws, stainless steel screws SUS316. Of course, some requirements are not so high; the general customer will choose the cost of relatively cheap stainless steel screws SUS201.

Metric 316 Stainless Steel Button Head Hex Drive Screws:316 stainless steel screws resist corrosion from chemicals and saltwater better than 18-8 stainless steel screws. All are passivated for added protection against oxidation and corrosion. Screws may be mildly magnetic. Length is measured from under the head.

316 Stainless Steel Pan Head Phillips Screws: More corrosion resistant than 18-8 stainless steel screws, these pan head screws have excellent resistance to chemicals and salt water. All are passivated for added protection against oxidation and corrosion. They may be mildly magnetic. Length is measured from under the head.

Metric 316 Stainless Steel Extra-Wide Truss Head Phillips Screws:316 stainless steel screws resist corrosion from chemicals and saltwater better than 18-8 stainless steel screws. All are passivated for added protection against oxidation and corrosion. The extra-wide truss head distributes holding pressure to reduce the likelihood of crushing thin material. Screws may be mildly magnetic. Length is measured from under the head.

316 Stainless Steel Flanged Button Head Screws: More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer. Screws may be mildly magnetic. Head height includes the flange. Length is measured from under the flange.

Passivated stainless steel screws provide added protection against oxidation and corrosion.

316 Stainless Steel Decorative Round Head Slotted Screws: More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They are passivated for added protection against oxidation and corrosion. The tall, domed head provides a finished appearance. Screws may be mildly magnetic. Length is measured from under the head.

316 Stainless Steel High-Profile Narrow Fillister Head Slotted Screws: More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They're passivated for added protection against corrosion and oxidation. All have a tall head with a deep drive to maximize driving power and a narrow diameter to fit in tight spaces. Screws may be mildly magnetic. Length is measured from under the head.

(5) Anti-loosening solution

I previously met a customer. The company needed stainless steel screws are required to prevent loosening. Simply put is to make the stainless steel screws used in the product material can make the stainless steel screws will not fall lightly. Need screws and products and materials more tightly connected. For stainless steel screws anti-loosening solution, there are two solutions. The following statement of the two solutions is to solve the problem of anti-loosening stainless steel standardized parts.

The first is using unique anti-elasticity materials, such as engineering resin materials with better anti-elasticity. Attach it to the stainless steel screw thread. Make it with the nut or material products for mechanical friction. Produce vibration and absolute resistance. Completely solve the problem of screw loosening.

The second, simply put, is in the stainless steel screw teeth threads coated with a layer of glue, the so-called spot glue. This kind of glue is called drop-resistant glue. This glue has a high sticker, is non-toxic, and has other suitable properties. This kind of glue is coated on the stainless steel screw, and after drying, the adhesive force is super strong. Can make the stainless steel screw threads in the nut thread combination or in the product threaded hole joint produce a super cause of the fastening effect. Play an anti-loosening superb impact.

Stainless steel screws usually refer to steel screws that can resist corrosion by air, water, acid, alkali salt, or other media. Stainless steel screws are generally not easy to rust, durable, and can be used in environmental protection equipment, medical equipment, communication equipment, and other fields.

Metric Stainless Steel Thread-Locking Button Head Hex Drive Screws: These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. A nylon patch bonded to the threads adds friction to prevent loosening from vibration. Length is measured from under the head.

Vibration-Resistant Sealing Rounded Head Screws: A nylon patch bonded to the threads of these screws adds friction to prevent loosening from vibration, while an O-ring prevents leaks and seals out contaminants. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. They’re passivated for added protection against oxidation and corrosion. The silicone O-ring withstands salt water and is suitable for various temperatures. Length is measured from under the head.

Stainless Steel Thread-Locking Hex Drive Flat Head Screws: These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. A nylon patch bonded to the threads adds friction to prevent loosening from vibration. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.

Passivated stainless steel screws have added protection against oxidation and corrosion.

Metric 18-8 Stainless Steel Thread-Locking Cup-Point Set Screws: Made from 18-8 stainless steel, these set screws are chemical resistant and may be mildly magnetic. They have a nylon locking patch that grips threads to resist loosening. A cup point with a thin edge digs into the contact surface for a secure hold. The length listed is the overall length.

Super-Corrosion-Resistant 316 Stainless Steel Thread-Locking Cup-Point Set Screws: Made from 316 stainless steel, these set screws have excellent chemical resistance and can be used in saltwater environments. They have a nylon locking patch that grips threads to resist loosening. A cup point with a thin edge digs into the contact surface for a secure hold. The length listed is the overall length.

For high-quality Super-Corrosion-Resistant 316 Stainless Steel Thread-Locking Cup-Point Set Screws for Sheet Metal and professional technical support, don't hesitate to contact us at adelajonly@gmail.com or visit our website at: https://www.juxinfasteners.com.