We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

SPEC Extension Spring: 302 Stainless Steel, 303 mm Free Lg, 4 mm Wire Dia - Machine Hook Extension Springs
SPECMachine Hook Extension Springs

SPEC Extension Spring: 302 Stainless Steel, 303 mm Free Lg, 4 mm Wire Dia

The SPEC Extension Spring (SKU HM4504000303S, MPN HM4504000303S) is a machine hook extension spring made from 302 stainless steel. It has a free length of 303 mm, a wire diameter of 4 mm, and an outer diameter of 45…

SKU 3G-OTH-680152

Brand
SPEC
Item
Extension Spring: 302 Stainless Steel, 303 mm Free Lg, 4 mm Wire Dia
Category
Machine Hook Extension Springs
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SPEC
Manufacturer Part Number
HM4504000303S
O.D
45 mm
Finish
Plain
Free Lg
303 mm
Wire Dia
4 mm

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

SPEC Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SPEC Extension Spring (SKU HM4504000303S, MPN HM4504000303S) is a machine hook extension spring made from 302 stainless steel. It has a free length of 303 mm, a wire diameter of 4 mm, and an outer diameter of 45 mm, with a plain finish.

Frequently Asked Questions

What is the SPEC HM4504000303S extension spring used for?

The SPEC HM4504000303S extension spring is used in industrial machinery, automation, and material handling systems to store and release energy, provide tension, or counterbalance loads. Its 302 stainless steel construction suits applications requiring corrosion resistance, such as food processing or chemical environments.

What are the specifications of the SPEC HM4504000303S extension spring?

The SPEC HM4504000303S extension spring has a free length of 303 mm, wire diameter of 4 mm, outer diameter of 45 mm, and a plain finish. It is made from 302 stainless steel with machine hook ends, designed for tension applications in industrial equipment.

Where to buy the SPEC HM4504000303S extension spring worldwide?

3G Electric supplies the SPEC HM4504000303S extension spring worldwide, handling full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source and deliver genuine SPEC parts across 14 departments, including springs and fasteners.

How to select the right extension spring for an industrial application?

To select the right extension spring, match free length, wire diameter, outer diameter, and material to your load and deflection requirements. For the SPEC HM4504000303S, verify the 303 mm free length and 4 mm wire diameter suit your tension needs. Consult a spring selection guide or contact 3G Electric for application support.

SPEC Products

3G Electric supplies SPEC machine hook extension springs. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from SPEC

View all SPEC parts
This extension spring features machine hooks on both ends for attachment. With an outer diameter of 8 mm, wire diameter of 1.6 mm, and free length of 91 mm, it provides pulling force in applications such as counterbalancing, tensioning, and return mechanisms. Supplied as a 2-pack with a plain finish
SPEC
This extension spring features machine hooks on both ends for attachment. With an outer diameter of 8 mm, wire diameter of 1.6 mm, and free length of 91 mm, it provides pulling force in applications such as counterbalancing, tensioning, and return mechanisms. Supplied as a 2-pack with a plain finish
Extension spring with machine hooks for tension applications. Outer diameter 0.18 in, free length 2-3/4 in, wire diameter 0.031 in. Plain finish. Supplied in a pack of 5. Used in machinery, automation, and material handling where a pulling force is required
SPEC
Extension spring with machine hooks for tension applications. Outer diameter 0.18 in, free length 2-3/4 in, wire diameter 0.031 in. Plain finish. Supplied in a pack of 5. Used in machinery, automation, and material handling where a pulling force is required
This 5-pack of machine hook extension springs from SPEC features a 0.36 in outer diameter, 1-1/8 in free length, and 0.026 in wire diameter with a plain finish. Extension springs store and release energy by resisting a pulling force, commonly used in industrial machinery, automotive assemblies, and material handling equipment where return or tension force is required
SPEC
This 5-pack of machine hook extension springs from SPEC features a 0.36 in outer diameter, 1-1/8 in free length, and 0.026 in wire diameter with a plain finish. Extension springs store and release energy by resisting a pulling force, commonly used in industrial machinery, automotive assemblies, and material handling equipment where return or tension force is required
Extension spring with machine hooks for tension applications. Stores energy and resists pulling forces. Used in industrial machinery, automation equipment, valves, clutches, and counterbalance mechanisms. Specifications: 5 mm outer diameter, 0.7 mm wire diameter, 24 mm free length, plain finish, 2 pack
SPEC
Extension spring with machine hooks for tension applications. Stores energy and resists pulling forces. Used in industrial machinery, automation equipment, valves, clutches, and counterbalance mechanisms. Specifications: 5 mm outer diameter, 0.7 mm wire diameter, 24 mm free length, plain finish, 2 pack
Machine hook extension spring made of 302 stainless steel with plain finish. Free length 6 1/2 in, wire diameter 0.115 in, outer diameter 1 in. Stores energy and resists pulling forces, returning components to original position after stretching. Suitable for industrial machinery, automotive assemblies, and material handling equipment
SPEC
Machine hook extension spring made of 302 stainless steel with plain finish. Free length 6 1/2 in, wire diameter 0.115 in, outer diameter 1 in. Stores energy and resists pulling forces, returning components to original position after stretching. Suitable for industrial machinery, automotive assemblies, and material handling equipment
Machine hook extension spring made of 302 stainless steel with plain finish. Free length 2-3/4 in, wire diameter 0.039 in, outer diameter 0.36 in. Supplied as a 5-pack. Used to provide tension in mechanical assemblies such as industrial machinery, material handling equipment, and automation systems
SPEC
Machine hook extension spring made of 302 stainless steel with plain finish. Free length 2-3/4 in, wire diameter 0.039 in, outer diameter 0.36 in. Supplied as a 5-pack. Used to provide tension in mechanical assemblies such as industrial machinery, material handling equipment, and automation systems
Music wire extension spring with machine hook ends. Free length 33 mm, wire diameter 0.5 mm, outer diameter 3.5 mm. Oil finish. Supplied as a 2-pack. Used in applications requiring tension force, such as conveyor systems, packaging machinery, and valve returns
SPEC
Music wire extension spring with machine hook ends. Free length 33 mm, wire diameter 0.5 mm, outer diameter 3.5 mm. Oil finish. Supplied as a 2-pack. Used in applications requiring tension force, such as conveyor systems, packaging machinery, and valve returns
Extension spring with machine hooks for tension applications. Stores and releases energy when subjected to a pulling force, returning components to their original position. Suitable for use in industrial machinery, automotive assemblies, and material handling equipment
SPEC
Extension spring with machine hooks for tension applications. Stores and releases energy when subjected to a pulling force, returning components to their original position. Suitable for use in industrial machinery, automotive assemblies, and material handling equipment