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RS PRO Stainless Steel Extension Spring, 31 mm Free Length x 4.5 mm Outside Diameter 821-497

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RS PRO Stainless Steel Extension Spring, 31 mm Free Length x 4.5 mm Outside Diameter 821-497

Name: RS PRO Stainless Steel Extension Spring, 31 mm Free Length x 4.5 mm Outside Diameter 821-497
Brand: RS PRO
SKU: 396865
Price: 0.96 USD
Availability: InStock

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Category Extension Springs Brand RS PRO Condition New

Specifications

Country of Origin	United Kingdom
Brand	RS PRO
Material	Stainless Steel
Model	821-497
Outside diameter	4.5mm
Wire Diameter	0.63mm
Standards/Approvals	RoHS, DIN 17223, BS 1408 CR3
Free Length	31mm
Spring Rate	0.58N/mm
Maximum Extended Length	53.6mm
Initial Tension	15.2N

Key Features

Constructed from high-quality stainless steel ensuring corrosion resistance.
Has an initial tension of 15.2 N for reliable performance.
Complies with RoHS, DIN 17223, and BS 1408 CR3 standards.
Maximum extended length of 53.6 mm allows for energy absorption and storage.
Suitable for automotive interiors and exteriors and garage door assemblies.
Features wound springs with loop ends for easy installation.
Provides consistent tension for applications like trampolines and farm machinery.

Product Description

RS PRO 821-497 stainless steel extension spring is engineered to provide reliable resistance to pulling forces with a free length of 31 mm and an outside diameter of 4.5 mm. Made from premium stainless steel, this spring delivers excellent corrosion resistance and durability. It is ideal for industrial, automotive, and mechanical applications that require precise tension control and energy storage.

The spring features a wire diameter of 0.63 mm and an initial tension of 15.2 N. Its spring rate of 0.58 N/mm ensures suitable elasticity and effective force absorption up to its maximum extended length of 53.6 mm. This product complies with strict RoHS, DIN 17223, and BS 1408 CR3 standards, underscoring its quality and safety for various compliance environments.

RS PRO extension springs are widely used in automotive interiors and exteriors, garage door mechanisms, vice-grip pliers, trampolines, washing devices, and agricultural machinery. The wound coil design with looped ends facilitates quick and easy installation, reducing assembly time and maintenance requirements.

Extension Springs operate by pulling two fixed components together when stretched, making them essential for applications where resistance to tension is required without the bulk of compression springs. This model’s stainless steel material composition contributes significantly to its long service life and consistent performance in demanding environments.

Corrosion-resistant stainless steel construction. 31 mm free length and 4.5 mm outside diameter dimensions. Initial tension of 15.2 N for operational consistency. Spring rate of 0.58 N/mm for controlled elasticity. Flexible maximum extended length of 53.6 mm.

Certified to RoHS, DIN 17223, and BS 1408 CR3 standards. Ideal for automotive, mechanical, and agricultural applications.

This RS PRO stainless steel extension spring is designed for reliably absorbing and storing energy while providing resistance to pulling forces. It suits various industrial and commercial uses, ensuring long-term durability and effective performance. For additional high-quality springs and fasteners, browse EnvMart’s extensive mechanical tools and equipment categories.