Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

SPEC Machine Hook Extension Spring 2-Pack - Machine Hook Extension Springs
SPECMachine Hook Extension Springs

SPEC Machine Hook Extension Spring 2-Pack

The SPEC Extension Spring is a 302 Stainless Steel machine hook extension spring with a 17 mm free length, 0.55 mm wire diameter, and 2.8 mm outer diameter. Supplied as a 2-pack with a plain finish (MPN…

SKU 3G-OTH-679604

Brand
SPEC
Item
Machine Hook Extension Spring 2-Pack
Part Number
HM0280550017S
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 — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

SPEC
Manufacturer Part Number
HM0280550017S
Type
2 PK
O.D.
2.8 mm
Finish
Plain
Free Lg
17 mm
Wire Dia
0.55 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 is a 302 Stainless Steel machine hook extension spring with a 17 mm free length, 0.55 mm wire diameter, and 2.8 mm outer diameter. Supplied as a 2-pack with a plain finish (MPN HM0280550017S), this component is sourced and quoted by 3G Electric across 14 industrial departments, with specialist depth in combustion, pumps, and controls.

Frequently Asked Questions

What is a SPEC extension spring used for?

A SPEC extension spring stores and releases energy to provide tension in mechanical assemblies. It is commonly used in industrial equipment, automation systems, and machinery across sectors like material handling, pneumatics, and combustion systems.

What are the specifications of the SPEC HM0280550017S extension spring?

The SPEC HM0280550017S is a 302 stainless steel machine hook extension spring with a 17 mm free length, 0.55 mm wire diameter, and 2.8 mm outer diameter. It has a plain finish and is supplied as a 2-pack.

Where to buy SPEC extension springs in worldwide?

3G Electric supplies and delivers SPEC extension springs worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure your order reaches any international destination.

How to select the right extension spring for an application?

Select an extension spring by matching free length, wire diameter, outer diameter, and material to your load and deflection requirements. For the SPEC HM0280550017S, the 302 stainless steel offers corrosion resistance suitable for many industrial environments.

Not sure this is the right part? Photo-identify it

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
Extension spring with machine hook ends for tension applications. Constructed from 302 stainless steel with a plain finish. Free length 63.7 mm, wire diameter 1.6 mm, outer diameter 17 mm. Supplied as a 2-pack
SPEC
Extension spring with machine hook ends for tension applications. Constructed from 302 stainless steel with a plain finish. Free length 63.7 mm, wire diameter 1.6 mm, outer diameter 17 mm. Supplied as a 2-pack
Extension Spring: 302 Stainless Steel, 7 1/2 in Free Lg, 0.115 in Wire Dia, 1.25 in O.D. (MPN H12501157500S)
SPEC
Extension Spring: 302 Stainless Steel, 7 1/2 in Free Lg, 0.115 in Wire Dia, 1.25 in O.D. (MPN H12501157500S)
Extension Spring: 302 Stainless Steel, 7 1/2 in Free Lg, 0.148 in Wire Dia, 1.25 in O.D. (MPN H12501487500S)
SPEC
Extension Spring: 302 Stainless Steel, 7 1/2 in Free Lg, 0.148 in Wire Dia, 1.25 in O.D. (MPN H12501487500S)
This SPEC extension spring is made of music wire with machine hooks on both ends. It has a free length of 29.2 mm, wire diameter of 0.7 mm, and outer diameter of 3.5 mm. The oil finish provides corrosion resistance. Supplied in a 2-pack, it is used to provide tension in mechanical assemblies such as counterbalances and industrial machinery
SPEC
This SPEC extension spring is made of music wire with machine hooks on both ends. It has a free length of 29.2 mm, wire diameter of 0.7 mm, and outer diameter of 3.5 mm. The oil finish provides corrosion resistance. Supplied in a 2-pack, it is used to provide tension in mechanical assemblies such as counterbalances and industrial machinery
This extension spring is made of music wire with machine hook ends. It has a 1.1 mm wire diameter, 12 mm outer diameter, and 204.8 mm free length. The oil finish provides corrosion resistance. Typical applications include providing pulling force in industrial machinery, conveyors, agricultural equipment, and automotive assemblies
SPEC
This extension spring is made of music wire with machine hook ends. It has a 1.1 mm wire diameter, 12 mm outer diameter, and 204.8 mm free length. The oil finish provides corrosion resistance. Typical applications include providing pulling force in industrial machinery, conveyors, agricultural equipment, and automotive assemblies
Music wire extension spring with machine hooks. Wire diameter 0.037 in, outside diameter 0.3 in, free length 1 1/4 in. Oil finish. Sold in a pack of 5. Used to provide tension in assemblies such as counterbalances, door closers, and conveyor systems
SPEC
Music wire extension spring with machine hooks. Wire diameter 0.037 in, outside diameter 0.3 in, free length 1 1/4 in. Oil finish. Sold in a pack of 5. Used to provide tension in assemblies such as counterbalances, door closers, and conveyor systems
Extension spring with machine hooks, 302 stainless steel, plain finish. Free length 55.3 mm, wire diameter 2.5 mm, outer diameter 13 mm. Used to store and release energy in tension applications such as industrial machinery, automotive assemblies, and agricultural equipment
SPEC
Extension spring with machine hooks, 302 stainless steel, plain finish. Free length 55.3 mm, wire diameter 2.5 mm, outer diameter 13 mm. Used to store and release energy in tension applications such as industrial machinery, automotive assemblies, and agricultural equipment
This 2-pack of machine hook extension springs is made from music wire with an oil finish. Each spring has a free length of 4 inches, a wire diameter of 0.105 inches, and an outer diameter of 1 inch. Extension springs provide tension in applications such as industrial machinery, packaging equipment, and material handling systems
SPEC
This 2-pack of machine hook extension springs is made from music wire with an oil finish. Each spring has a free length of 4 inches, a wire diameter of 0.105 inches, and an outer diameter of 1 inch. Extension springs provide tension in applications such as industrial machinery, packaging equipment, and material handling systems