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RS PRO Stainless Steel Extension Spring 27.2 mm Free Length x 4 mm Outside Diameter 821-396

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RS PRO Stainless Steel Extension Spring 27.2 mm Free Length x 4 mm Outside Diameter 821-396

Name: RS PRO Stainless Steel Extension Spring 27.2 mm Free Length x 4 mm Outside Diameter 821-396
Brand: RS PRO
SKU: 137330
Price: 1.01 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	821-396
Outside diameter	4mm
Wire Diameter	0.36mm
Standards/Approvals	RoHS, DIN 17223, BS 1408 CR3
Free Length	27.2mm
Spring Rate	0.048N/mm
Maximum Extended Length	95.7mm
Initial Tension	3.55N
RS PRO Steel Extension Spring, 27.2 mm x 4 mm ODBrand	RS PRO

Key Features

The spring provides a maximum extended length of 95.7 mm ensuring ample extension capacity.
Initial tension is 3.55 Newtons for immediate force application upon extension.
The wire diameter is 0.36 mm contributing to the spring's strength and flexibility.
The spring rate of 0.048 N/mm enables gradual resistance to extension.
Constructed from corrosion-resistant stainless steel for durability in harsh environments.
Equipped with two looped hooks at each end for secure and easy attachment.
Certified to RoHS standards and compliant with DIN 17223 and BS 1408 CR3 for quality assurance.
Suitable for use in industrial applications including garage doors, agricultural machinery, and trampolines.

Product Description

RS PRO 821-396 Stainless Steel Extension Spring is engineered to absorb and store energy in pulling forces between connected components. Featuring a free length of 27.2 mm and an outside diameter of 4 mm, the spring reliably extends up to 95.7 mm with an initial tension of 3.55 N.

Each end of the spring is furnished with two looped hooks, enabling quick and secure attachment without the need for additional bending or shaping. The stainless steel construction ensures resistance to corrosion and wear, making this spring suitable for demanding indoor and outdoor industrial environments.

Compliant with RoHS, DIN 17223, and BS 1408 CR3 standards, this extension spring meets high-quality and safety benchmarks. It is ideal for use in various industrial and mechanical applications such as garage door assemblies, agricultural machinery, industrial equipment, and trampoline mechanisms.

The spring rate is precisely 0.048 N/mm providing controlled elastic resistance. The wire diameter is 0.36 mm balancing strength and flexibility for demanding operations. The spring can extend up to 95.7 mm from its free length to accommodate varied installation requirements.

Its corrosion-resistant stainless steel material guarantees durability even under exposure to harsh chemicals and weather. Looped hooks at both ends allow for robust and effortless connection to other components. The product is manufactured under strict quality control in the United Kingdom ensuring consistent performance.

This extension spring is an essential component for mechanical fastening solutions where tension retention and energy absorption are critical. Reliable and robust, it serves multiple industrial sectors including manufacturing, agriculture, and construction.

Find more RS PRO industrial tools and components in EnvMart’s Mechanical Machinery & Spares category for trusted quality and comprehensive selection.

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