Lock Nut Manufacturer
Best Butt Weld Fittings Manufacturer in India since 1971.

Table of Contents
Teshi Group : Leading Manufacturer, Stockist, Supplier, and Exporter of Lock Nut in India.
Teshi Group is a leading manufacturer, stockist, supplier, and exporter of high-quality lock nuts in India, offering durable and reliable fastening solutions for a wide variety of industrial applications. Specializing in precision-engineered lock nuts, Teshi Group ensures that their products provide secure, vibration-resistant connections, preventing loosening or dislodgement during operation. These lock nuts are widely used across industries such as automotive, machinery, construction, oil & gas, and power generation, where high-performance, secure fastenings are critical. Teshi Group’s lock nuts are designed to offer superior locking functionality, whether through a nylon insert, serrated edges, or a mechanical locking mechanism, ensuring a strong grip that withstands external forces and vibrations. Manufactured with high-quality materials and advanced production techniques, Teshi Group guarantees that each lock nut meets international standards for strength, corrosion resistance, and reliability. Available in a range of sizes, materials, and finishes, Teshi Group’s lock nuts are tailored to meet specific industrial needs, providing both versatility and high performance. With a focus on quality and customer satisfaction, Teshi Group’s lock nuts are the preferred choice for industries seeking secure, efficient, and long-lasting fastening solutions.
About Lock Nut :-
A lock nut is a type of nut specifically designed to resist loosening due to vibrations or external forces, ensuring the secure and stable fastening of components in various mechanical and structural applications. Unlike standard nuts, lock nuts feature a unique design or mechanism that provides enhanced locking capability. These may include features like a nylon insert (as in nylon lock nuts), a deformed thread (as in prevailing torque lock nuts), or a mechanical locking feature (such as a serrated face or a tab that engages with the mating surface). Lock nuts are commonly used in industries where equipment is subjected to frequent vibrations, such as automotive, aerospace, machinery, and construction. Their primary function is to maintain the integrity of threaded connections over time, preventing them from loosening and ensuring the safety, reliability, and longevity of the assembled components. Available in a wide range of sizes and materials, lock nuts are selected based on the specific requirements of the application, including load-bearing capacity, corrosion resistance, and temperature tolerance. These versatile components play a critical role in maintaining the structural integrity and operational efficiency of complex assemblies across various sectors.
Teshi Group is an ISO certified Lock Nut manufacturer & distributor in India.
Lock Nut Specification, Grades & Material
Standard Specifications |
Length
|
3 mm to 200 mm
|
---|---|
Standard
|
ASME/ANSI B16.11, MSS-SP-97, MSS-SP-79, JIS B2316, BS 3799
|
Size
|
1/2" diameter through 2"
|
Material
|
MS, Stainless Steel & Aluminium
|
Material & Grades |
Stainless Steel
|
Grade: ASTM 182 , ASTM 193, ASTM 194, B8 (304), B8C (SS347), B8M (SS316), B8T (SS321), A2, A4, 304 / 304L / 304H, 310, 310S, 316 / 316L / 316H / 316 Ti, 317 / 317L, 321 / 321H, A193 B8T 347 / 347 H, 431, 410
|
---|---|
Duplex & Super Duplex Steel
|
S31803, S32205
|
Carbon Steel
|
ASTM 193, ASTM 194, B6, B7/ B7M, B16, 2, 2HM, 2H, Gr6, B7, B7M
|
Alloy Steel
|
Grade: ASTM 320 L7, L7A, L7B, L7C, L70, L71, L72, L73
|
Nickel Alloy
|
UNS 2200 (Nickel 200) / UNS 2201 (Nickel 201), UNS 4400 (Monel 400), UNS 8825 (Inconel 825), UNS 6600 (Inconel 600) / UNS 6601 (Inconel 601), UNS 6625 (Inconel 625),UNS 10276 (Hastelloy C 276), UNS 8020 (Alloy 20 / 20 CB 3)
|
Teshi Group Is A Leading Suppliers of Lock Nut
We supply Lock Nut to Agra, Ahmedabad, Ajmer, Aligarh, Allahabad, Ambattur, Amravati, Amritsar, Asansol, Aurangabad, Bangalore, Bareilly, Belgaum, Bhavnagar, Bhilai Nagar, Bhiwandi, Bhopal, Bhubaneswar, Bikaner, Chandigarh, Chennai, Coimbatore, Cuttack, Dehradun, Delhi, Dhanbad, Durgapur, Faridabad, Firozabad, Gaya, Ghaziabad, Gorakhpur, Gulbarga, Guntur, Gurgaon, Guwahati, Gwalior, Haora, Hubli and Dharwad, Hyderabad, Indore, Jabalpur, Jaipur, Jalandhar, Jalgaon, Jammu, Jamnagar, Jamshedpur, Jhansi, Jodhpur, Kalyan & Dombivali, Kanpur, Karnataka, Kochi, Kolapur, Kolkata, Kota, Loni, Lucknow, Ludhiana, Madurai, Maheshtala, Malegoan, Mangalore, Meerut, Mira, Bhayander, Moradabad, Mumbai, Nagpur,Nanded Waghala, Nashik, Navi Mumbai, Nellore, Noida, Patna, Pimpri & Chinchwad, Pune, Raipur, Rajkot, Ranchi, Saharanpur, Salem, Sangli Miraj Kupwad, Siliguri, Solapur, Srinagar, Surat, Thane, Thiruvananthapuram, Tiruchirappalli, Tirunelveli, Udaipur, Ujjain, Ulhasnagar, Vadodara, Varanasi, Vasai Virar, Vijayawada, Visakhapatnam, Warangal.
Lock Nut Exporter To All Major Cities In The World
We export Lock Nut to Seoul, Hanoi, Los Angeles, Rio de, Houston, York, Dammam, Al-Khobar, Bogota, Al-Jubail, Chiyoda, Abu Dhabi, Kuwait Santiago, Perth, Busan, London, Jakarta, Surat, Courbevoie, Dallas, Calgary, Mexico Muscat, Aberdeen, City, Edmonton, Riyadh, Caracas, Ahvaz, Brisbane, Moscow, Milan, Manama, Ulsan, Jaya, Granada, Vung Petaling, Melbourne, Montreal, Port-of-Spain, La Victoria, Istanbul, Janeiro, Karachi, New Singapore, Madrid, Lagos, Atyrau, Sydney, Kuala Dubai, City, Bangkok, Toronto, Gimhae-si, Lumpur, Jeddah, Pimpri-Chinchwad, Tehran, Doha, Ho-Chi-Minh-City, Algiers, Tau, Colombo, Ernakulam, Geoje-si, Cairo, Sharjah, Lahore.
Teshi exports Lock Nut in more than 50 countries. We have shipments going out monthly to different countries for our newly acquired customers. Our ready stock of Flanges helps us ship the Flange and meet the requirement and demands of our customers as fast as possible.
We Export Lock Nut to United States (USA), Canada, Germany, Japan, France, Middle-East, Bangladesh, Nepal etc.
Product
Export
ASME B15.5 & B 16.47, AWWA, IS 1538, IS 6392, EN 1092 etc.
Dimension
Standards
Frequently Asked Questions
Most frequent questions and answers
What is a lock nut?
A lock nut is a type of nut designed to resist loosening from vibrations or torque. It features a built-in mechanism, such as a nylon insert or serrations, to create friction against the bolt and prevent it from turning.
What are the types of lock nuts?
Common types of lock nuts include:
- Nylon-insert lock nuts (Nylock nuts)
Metal-locking nuts (all-metal lock nuts)
Castle nuts
Serrated flange nuts
Prevailing torque nuts
How does a nylon insert lock nut work?
A nylon insert lock nut has a nylon ring inside its threads that grips the bolt, providing resistance to movement and preventing the nut from loosening. It is often used in applications requiring a strong, vibration-resistant connection.
Can lock nuts be used with any type of bolt?
Lock nuts can be used with most bolts, but the size, thread type, and material of both the lock nut and the bolt must match for proper installation and performance.
What materials are lock nuts made from?
Lock nuts are typically made from materials like steel, stainless steel, brass, or alloy steel. The choice of material depends on the application’s strength, corrosion resistance, and environmental conditions.
Are lock nuts reusable?
Nylon-insert lock nuts can often be reused, but their effectiveness may degrade after multiple uses. All-metal lock nuts, such as prevailing torque nuts, can be reused depending on the condition of the threads.
What is the difference between a lock nut and a regular nut?
A regular nut does not have any built-in locking mechanism, meaning it can loosen due to vibration or torque. A lock nut has features like a nylon insert, serrations, or prevailing torque to prevent loosening.
What is a prevailing torque lock nut?
A prevailing torque lock nut creates resistance to loosening through deformation of the threads, often with a metal insert or by using specially treated threads to grip the bolt.
What is a castle nut?
A castle nut is a type of lock nut that has a series of slots on its top and is typically used with a cotter pin to prevent the nut from loosening. It is commonly used in automotive, heavy machinery, and military applications.
When should I use a lock nut?
Lock nuts are ideal for applications where vibrations, shock loads, or movement might cause a regular nut to loosen, such as in machinery, automotive, and structural connections.
What are serrated flange lock nuts?
Serrated flange lock nuts have a built-in flange with serrations that dig into the surface of the material, providing additional resistance to loosening. They are often used in high-vibration applications.
Can I use a lock nut with a washer?
Yes, lock nuts can be used with washers, although some lock nuts, such as serrated flange lock nuts, have an integrated washer built into the nut itself.
How do I tighten a lock nut?
Lock nuts should be tightened using the same tools as regular nuts. However, it is important to ensure that the torque is applied correctly to avoid damaging the locking mechanism or over-tightening the connection.
Are lock nuts better than regular nuts?
Lock nuts offer additional security, especially in applications with high vibration or where safety is critical, making them more effective than regular nuts in many industrial, automotive, and machinery applications.
What are all-metal lock nuts?
All-metal lock nuts are designed with special features, such as deformed threads or a hard metal insert, which create friction against the bolt, preventing loosening without the use of nylon or other inserts.
Can lock nuts be used in high-temperature environments?
Yes, certain lock nuts made from heat-resistant materials such as stainless steel or alloy steel are designed for high-temperature applications and can effectively resist loosening even in extreme conditions.
What is the advantage of using a lock nut over a regular nut?
The main advantage of using a lock nut is its ability to resist loosening from vibrations or external forces, providing a more secure and stable fastening, especially in dynamic environments.
Can lock nuts be used in outdoor applications?
Yes, lock nuts made from corrosion-resistant materials like stainless steel or zinc-coated lock nuts are ideal for outdoor applications, including marine and construction environments.
Are there different grades of lock nuts?
Yes, lock nuts come in different grades depending on the material and strength required for the application. For example, Grade 8 lock nuts are high-strength nuts commonly used in heavy-duty applications.
Can lock nuts be installed without a tool?
Some types of lock nuts, such as finger-tight nylon-insert lock nuts, can be installed by hand, but using a tool is generally recommended for securing the nut properly and ensuring it reaches the desired torque.