For samples, the lead time is about 7 days. For mass production, the lead time is 20-30 days after receiving the deposit payment. The lead times become effective when (1) we have
received your deposit, and (2) we have your final approval for your products. If our lead times do not work with your deadline, please go over your requirements with your sale. In all
cases we will try to accommodate your needs. In most cases we are able to do so.
A double-stacked self-locking washer is a special mechanical connector designed to prevent bolts from loosening, especially in high-vibration or high-load environments.It consists of two spring washers nested inside each other in an S-shaped configuration. The outer spring washer has ends that bend inwards, while the inner spring washer has ends that bend outwards, creating a two-way self-locking feature.The working principle of this washer is based on elastic deformation. When placed between connecting parts, the inner curved part of the outer spring ring interlocks with the outer curved part of the inner spring ring, creating a locking force that prevents the connecting parts from loosening under vibration or load.The advantages of the double-stacked self-locking washer include high reliability, easy installation, and a wide range of applications.It is suitable for various mechanical connections, such as threaded connections and pin connections, and is widely used in industrial production and machinery manufacturing, especially in the automotive manufacturing process, where it is often used to connect engine and chassis systems to improve the safety and reliability of the car.
Product Name
U-bolt
Package
BAG/BOX
Grade
4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9,etc
Available Material
304 stainless steel,plastic,brass,carbon steel,titanium,aluminum,etc
Surface treatment
Zinc plated,Black oxide,Phosphate,Dacroment,etc
Standard
ISO,BS,ANSI, GB,DIN,JIS,Nonstandard
Advantage
OEM / ODM / customized service provided
Quality control
ISO standard,100% Whole range inspection through the production
Certificate
ISO9001,ISO14001,IATF16949,ROHS,etc
Product Name
U-bolt
Package
BAG/BOX
Grade
4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9,etc
Available Material
304 stainless steel,plastic,brass,carbon steel,titanium,aluminum,etc
Surface treatment
Zinc plated,Black oxide,Phosphate,Dacroment,etc
Standard
ISO,BS,ANSI, GB,DIN,JIS,Nonstandard
Advantage
OEM / ODM / customized service provided
Quality control
ISO standard,100% Whole range inspection through the production
Certificate
ISO9001,ISO14001,IATF16949,ROHS,etc
item
connecting nut
Application
Heavy Industry, General Industry, Automotive Industry
Material
carbon steel, stainless steel
Size
M6 M8 M10 M12 M16
Packing
Cartons and pallets or according to customer’s requirements
Advantages:
Factory direct selling and competitive price
Delivery method:
Air, sea or express, such as EMS, UPS, TNT etc
Standard
GB, DIN, ISO, JIS
Size
M3-M50 or non-standard as request&design
Material
Carbon steel, stainless steel, alloys steel etc.
Hex head bolt and nut Grade
4.8 / 6.8 / 8.8 / 10.9 / 12.9 ,
A2-70 / A4-80
Packing
Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Product Name
Carbon Steel T-Bolt/T head bolt
Size
m10x75 m6 m12 m8 m9 m12 m20 m29
Grade
4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9,etc
Available Material
304 stainless steel,plastic,brass,carbon steel,titanium,aluminum,etc
Surface treatment
Zinc plated,Black oxide,Phosphate,Dacroment,etc
Standard
ISO,BS,ANSI, GB,DIN,JIS,Nonstandard
Advantage
OEM / ODM / customized service provided
Quality control
ISO standard,100% Whole range inspection through the production
Certificate
ISO9001,ISO14001,IATF16949,ROHS,etc
Finish
Plain/Zinc-plated/Galvanized/etc.
Measurement System
Metric/Inch
Place of Origin
China
Standard
GB/ISO/ANSI/DIN/BS/JIS
Material
Carbon steel/Stainless steel/Brass/Aluminum/etc.
Product Grade
Grade A
Strength Grade
Level 4.8/8.8,etc.
Applicable Industries
Construction Industry
Color
Plain/White/Black/Gold/etc.
Custom Support
ODM/OEM
Standard
GB, DIN, BSW, ASTM, ASME
Size
M3-M50 or non-standard as request&design
ASTM A193 B7 1/4″×13-1/4″×102, 5/16″×13-5/16″×152, 7/16″×25-7/16″×100
3/8″×13-3/8″×152, 1/2″×19-1/2″×152, 5/8″×32-5/8″×300, 3/4″×38-3/4×300
7/8″×50-7/8″×300
Material
Carbon steel, stainless steel, alloys steel etc.
Grade
4.8 / 8.8 / 10.9 / 12.9 ,
A2-70 / A4-80
Packing
Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Product Name
nuts
Size
M1-M16,or non-standard as request&design
Material
Stainless Steel,Alloy steel,Carbon Steel,Brass,Aluminum and So on
Grade
4.8,8.8,10.9,12.9.etc
Standard
GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
Non-standards
OEM is available, according to drawing or samples
Finish
Plain, black, zinc plated/according to your requirement
Certification
ISO9001,IATF16949,ISO14001,etc