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

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

SPEC Machine Hook Extension Spring

The SPEC Machine Hook Extension Spring (MPN HM0550800039M) is a music-wire spring with a 39 mm free length, 0.8 mm wire diameter, and 5.5 mm O.D., supplied as a 2-pack with an oil finish. 3G Electric sources this…

SKU 3G-OTH-681180

Brand
SPEC
Item
Machine Hook Extension Spring
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
HM0550800039M
Type
2 PK
O.D.
5.5 mm
Finish
Oil
Free Lg
39 mm
Wire Dia
0.8 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 Machine Hook Extension Spring (MPN HM0550800039M) is a music-wire spring with a 39 mm free length, 0.8 mm wire diameter, and 5.5 mm O.D., supplied as a 2-pack with an oil finish. 3G Electric sources this genuine industrial spring across 14 departments — and far more — with specialist depth in combustion, pumps and controls as an authorised distributor for brands like Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump and FBR.

Frequently Asked Questions

What is the SPEC HM0550800039M extension spring used for?

The SPEC HM0550800039M machine hook extension spring is used to store and release mechanical energy in industrial equipment, such as valves, conveyors, and tensioning assemblies. Its music-wire construction and oil finish suit general-purpose applications across machining, material handling, and automation systems.

What are the specifications of the SPEC HM0550800039M spring?

The SPEC HM0550800039M is a music-wire extension spring with a 39 mm free length, 0.8 mm wire diameter, and 5.5 mm O.D. It comes as a 2-pack with an oil finish. These specs define its load capacity and fit for machine hook applications in industrial settings.

Where to buy SPEC HM0550800039M extension spring worldwide?

3G Electric supplies the SPEC HM0550800039M extension spring worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine parts across 14 departments, including specialist expertise in combustion, pumps, and controls for brands like Schneider and ABB.

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

To select the right SPEC extension spring, match free length, wire diameter, and O.D. to your assembly's space and load requirements. The HM0550800039M's 39 mm free length and 0.8 mm wire diameter suit moderate-tension tasks. Always verify hook type and finish compatibility with your environment.

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 is made from music wire with a machine hook end configuration. It has an outside diameter of 1.5 in, a wire diameter of 0.177 in, and a free length of 4 1/2 in. The spring is finished with oil. Typical applications include industrial machinery, automotive assemblies, and material handling equipment where controlled return motion is required
SPEC
This extension spring is made from music wire with a machine hook end configuration. It has an outside diameter of 1.5 in, a wire diameter of 0.177 in, and a free length of 4 1/2 in. The spring is finished with oil. Typical applications include industrial machinery, automotive assemblies, and material handling equipment where controlled return motion is required
This machine hook extension spring is made of music wire with an oil finish. It has a 1.125 in outer diameter, 0.125 in wire diameter, and 4 1/2 in free length. Supplied as a 2-pack, it stores energy and provides resistance to pulling forces in applications such as industrial machinery, automotive assemblies, and material handling equipment
SPEC
This machine hook extension spring is made of music wire with an oil finish. It has a 1.125 in outer diameter, 0.125 in wire diameter, and 4 1/2 in free length. Supplied as a 2-pack, it stores energy and provides resistance to pulling forces in applications such as industrial machinery, automotive assemblies, and material handling equipment
Extension spring with machine hooks for tension applications. Made of 302 stainless steel with plain finish. Free length 5 in, wire diameter 0.135 in, outer diameter 1.25 in. Used in industrial machinery requiring pulling force, such as material handling, packaging, and automation systems
SPEC
Extension spring with machine hooks for tension applications. Made of 302 stainless steel with plain finish. Free length 5 in, wire diameter 0.135 in, outer diameter 1.25 in. Used in industrial machinery requiring pulling force, such as material handling, packaging, and automation systems
Extension spring with machine hooks for pulling force applications. 302 stainless steel construction with plain finish. Free length 1 1/4 in, wire diameter 0.029 in, outside diameter 0.24 in. Sold as a 5-pack
SPEC
Extension spring with machine hooks for pulling force applications. 302 stainless steel construction with plain finish. Free length 1 1/4 in, wire diameter 0.029 in, outside diameter 0.24 in. Sold as a 5-pack
This extension spring is made of music wire with a machine hook design and an oil finish. It has an outer diameter of 5.5 mm, a free length of 27.7 mm, and a wire diameter of 0.5 mm. Supplied as a 2-pack, it is used to store and release energy by resisting pulling forces in applications such as latches, clutches, and counterbalances
SPEC
This extension spring is made of music wire with a machine hook design and an oil finish. It has an outer diameter of 5.5 mm, a free length of 27.7 mm, and a wire diameter of 0.5 mm. Supplied as a 2-pack, it is used to store and release energy by resisting pulling forces in applications such as latches, clutches, and counterbalances
This extension spring is made from music wire with an oil finish. It has a free length of 79.4 mm, wire diameter of 3.2 mm, and outer diameter of 22 mm. Machine hook ends allow for attachment in tension applications such as counterbalances, linkages, and conveyor systems
SPEC
This extension spring is made from music wire with an oil finish. It has a free length of 79.4 mm, wire diameter of 3.2 mm, and outer diameter of 22 mm. Machine hook ends allow for attachment in tension applications such as counterbalances, linkages, and conveyor systems
This machine hook extension spring is made from 302 stainless steel with a plain finish. It has an outer diameter of 0.3 in, wire diameter of 0.037 in, and free length of 1-1/4 in. Supplied in a pack of 5, it is used to apply a pulling force between two components in mechanical assemblies
SPEC
This machine hook extension spring is made from 302 stainless steel with a plain finish. It has an outer diameter of 0.3 in, wire diameter of 0.037 in, and free length of 1-1/4 in. Supplied in a pack of 5, it is used to apply a pulling force between two components in mechanical assemblies
This SPEC extension spring is made of music wire with machine hooks, featuring a free length of 3 inches, wire diameter of 0.105 inches, and outer diameter of 1.125 inches. The oil finish provides corrosion resistance. Supplied in a 2-pack, it is suitable for moderate-duty applications requiring pulling force, such as counterbalances and garage door assemblies
SPEC
This SPEC extension spring is made of music wire with machine hooks, featuring a free length of 3 inches, wire diameter of 0.105 inches, and outer diameter of 1.125 inches. The oil finish provides corrosion resistance. Supplied in a 2-pack, it is suitable for moderate-duty applications requiring pulling force, such as counterbalances and garage door assemblies