Square Anti Vibration Spring Nut With Built-In Spring Steel

Product introduction

The spring nut is a fastening nut that integrates elastic self-locking and quick installation. It is widely used in automobile manufacturing, rail transit, electrical cabinets and other fields. As an important auto parts nut, it is made of spring steel. It uses an elastic structure to eliminate thread gaps, maintain stable clamping force under vibration conditions, and effectively prevent loosening.

The products cover special-shaped nuts and non-standard nuts, and the structure can be customized according to the customer's sheet metal opening, installation space and load requirements. We have IATF 16949 quality system certification, support full-process services from sample development to batch delivery, and provide customers with fastening solutions with high reliability and high assembly efficiency.

 

Product design and features

Elastic self-locking structure: built-in spring steel sheet or integrally formed spring arm, which automatically generates pre-tightening force after installation to effectively prevent loosening

Quick snap-in design: Most products can be directly snap-in into square holes or special-shaped holes, without the need for additional tools for fixation, greatly improving assembly efficiency.

Adjustability: allows for fine adjustments after installation to accommodate workpiece manufacturing tolerances

Compact design: small size and thin thickness, suitable for installation locations with limited space

 

Materials and application areas

Material

Spring steel (such as 65Mn, SUS301): Provides excellent elasticity and fatigue life, suitable for high vibration environments

Carbon steel surface treatment: Dacromet, zinc plating, nickel plating, etc. to meet corrosion resistance requirements

Stainless steel: suitable for wet, outdoor or high-cleanliness scenes

Application areas

Spring nuts are widely used in industries that require quick assembly + anti-vibration and anti-loosening:

Automobile manufacturing: As auto parts nuts, they are widely used in body sheet parts, seat slides, instrument panel brackets, battery pack fixing and other positions to meet the dual requirements of high reliability and assembly speed in the automotive industry.

Rail transit and construction machinery: used for structural connections with severe vibrations

Communication cabinets and electrical equipment: snap into C-shaped steel or cabinet square holes to achieve flexible wiring and equipment installation

Home appliances and sheet metal industry: quick fixing of panels, guide rails, modular components

 

Quality control and certification system

Spring Nut Safety and Reliability. Our company has established a full-process quality control system:

Raw material control: 100% batch mechanical properties re-inspection of spring steel strips to ensure stable elastic modulus and hardness

Stamping and Forming: Dimensional SPC (Statistical Process Control) Monitoring

Heat treatment: continuous mesh belt furnace, real-time recording of temperature curve and hardness distribution

Surface treatment: salt spray test, hydrogen embrittlement test

 

Finished product testing:

Elastic recovery test

Torque-Clamping Force Test

Vibration anti-loosening test (according to GB/T 10431 or ISO 16130 standard)

Certification system

ISO 9001, IATF 16949 (automotive industry quality management system)

Products can meet RoHS and REACH environmental protection requirements

For export needs, PPAP (Production Part Approval Process) three-level document packages can be provided

For nuts with special shapes and non-standard nuts, we have established special quality gates to ensure that each customized product maintains a process capability index Cpk ≥ 1.33 while increasing its structural complexity.

 

Customized services

Structural customization: design the clamping structure according to the customer's sheet metal opening shape (square hole, round hole, special-shaped hole)

Adjust the number, length, and thickness of spring arms to match different plate thickness and load requirements

Add positioning bumps, error-proofing structures, and auxiliary guide structures

Size and thread customization: Thread specifications: metric, imperial, American and non-standard threads, installation thickness: suitable for 0.8mm – 6.0mm thin plates, outline: round, square, oval, L-shaped, etc.

 

FAQ

Q: What are the advantages of spring nuts compared with ordinary welding nuts or pressure rivet nuts?

A: Spring nuts belong to the "elastic mounting type" among fastening nuts. They do not require welding or riveting and can be quickly snapped into sheet metal holes. They are especially suitable for thin plates or painted workpieces. They will not damage the surface coating and are easy to disassemble and repair.

 

Q: In the automotive field, where are spring nuts mainly used? Are they standard auto parts nuts?

A: Yes, spring nuts are typical automotive parts nuts, widely used in body door panels, dashboard beams, seat fixed points, battery pack internal brackets, etc. Its anti-vibration performance meets the higher-level anti-loosening requirements of the automotive industry.

 

Q: Can you provide spring nuts with non-standard shapes?

A: Yes. One of our core competencies is the provision of special-shaped nuts and non-standard nuts. Customers only need to provide the installation interface, load requirements and space constraints, and we can complete the structural design and verification.

Hexagon Nylon Insert Lock Nut

Type B Leaf Spring Nut

Hexagon Nut With Large Flat Washer And Tail Bolt

Stainless Steel Non-Standard Cross Hole Hammer Nuts

Corrosion-Resistant Carbon Steel Zinc-Plated Nuts

Corrosion Resistant Galvanized Special-Shaped Nuts