I. Characteristics
1. Structural design and core functions
- Increase the contact area: By expanding the contact surface between the bolt or nut and the connected part, the flat gasket reduces the pressure per unit area and avoids surface crushing or scratching (especially for soft or brittle materials).
- Uniform distribution pressure: When the surface of the connector is uneven or there is a difference in hardness, the flat gasket can disperse the load to prevent local stress concentration leading to deformation or damage.
- Simplify installation and adjustment: With long hole design, flat gaskets allow adjustment of installation position within a certain range, improving assembly flexibility.
2. Materials and properties
- Diverse materials: Common materials include carbon steel, stainless steel (such as 304/316), copper, aluminum and titanium alloy, to adapt to different environmental requirements (such as corrosion resistance, high temperature resistance, electrical conductivity, etc.).
- Surface treatment process: Through galvanizing, nickel plating or polishing processes to enhance rust resistance, some high-precision scenarios (such as US flat MATS) require tolerances up to Class A standards.
3. Application limitations
- No anti-loosening function: the flat gasket itself does not have anti-loosening or anti-vibration ability, and needs to be used with spring gaskets or other locking devices.
- Not suitable for high dynamic load: In the scenario of frequent vibration or large impact load, the use of flat gaskets alone is easy to cause loosening failure.
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II. Use
1. General industrial field
- Mechanical manufacturing: Used to protect the surface of bolt joints, such as hydraulic systems, transmission components, etc., to prevent direct metal friction.
- Automotive industry: Distribute the pressure in the engine, chassis and other parts to reduce the pressure loss of high-strength bolts on aluminum components.
- Construction works: compensation for bolt hole deviation in steel structure connection, or for stable support of wood structure and composite materials.
2. Special scenarios
- Chemical and Marine engineering: Stainless steel or titanium alloy flat gaskets for corrosion resistant environments, such as pipe flange seals, offshore platform equipment.
- Medical and electronic devices: biocompatible materials (such as titanium alloy) are used for implanted devices, and copper gaskets are used for conducting and cooling circuit boards.
3. Auxiliary functions
- Sealing and insulation: In non-high pressure environments, flat gaskets can be combined with sealing materials (such as rubber) for simple sealing or insulation.
- Repeated disassembly requirements: In cases of frequent disassembly (such as equipment maintenance), flat gaskets simplify operation and reduce surface wear.
III. Selection Recommendations
1. Material and Environment Matching: Select stainless steel (A2/A4) for humid environments, alloy steel (such as 35CrMo) for high-temperature scenarios, and copper gaskets for electrical conductivity requirements.
2. Dimensional Compatibility: The inner diameter should be slightly larger than the bolt diameter, and the outer diameter is typically about twice the inner diameter to ensure coverage of the contact surface.
3. Avoid Interference Issues: If the fillet under the bolt head is large, use a flat washer with an inner hole chamfer to prevent installation clearance.
| Material |
Carbon steel |
| Place of Origin |
Hebei, China |
| Finish |
Zinc Plating,plain,HDG |
| Grade |
4.8/8.8 |
| Size |
M5-M24 |
| Length |
10-200mm |
| Packing |
Bag carton |
| MOQ |
1ton |
1. who are we?
We are based in Hebei, China, start from 2017,sell to Eastern Europe(40.00%),North America(20.00%),South America(20.00%),Domestic Market(10.00%),Mid East(10.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Sleeve anchors/Anchors/Bolts/Nuts/Hooks
4. why should you buy from us not from other suppliers?
Our factory mainly produces: all kinds of flat washers,Drop in anchor ,and spring washers, anchor bolt , hex nut, hex bolt, sleeve anchor, and thread rod with DIN, BSW,Meanwhile, we are manufacturing factory, so we have good price and best quality
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian
HEBEI YUETONG FASTENERS MANUFACTURING CO.,LTD
HANDAN MOEN IMPORT AND EXPORT TRADING CO.,LTD
Contact Person: Nina
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