SPEC Extension Spring: Music Wire, 12.6 mm Free Lg, 0.8 mm Wire Dia, 4 mm O.D.
The SPEC Extension Spring is a machine hook extension spring made of music wire, supplied as a 2-pack. It features a 12.6 mm free length, 0.8 mm wire diameter, and 4 mm O.D., with an oil finish (MPN HM0400800013M).
SKU 3G-OTH-680394
Need installation or engineering help?
Ask a question
Product Description
The SPEC Extension Spring is a machine hook extension spring made of music wire, supplied as a 2-pack. It features a 12.6 mm free length, 0.8 mm wire diameter, and 4 mm O.D., with an oil finish (MPN HM0400800013M).
Frequently Asked Questions
What is a SPEC extension spring used for?
A SPEC extension spring with machine hooks is used to provide pulling force in industrial assemblies, such as counterbalances, latches, and tension mechanisms. The music wire construction and oil finish suit general-purpose applications across machining, material handling, and automation equipment.
What are the specifications of the SPEC extension spring HM0400800013M?
This SPEC extension spring has a 12.6 mm free length, 0.8 mm wire diameter, and 4 mm O.D. It is made of music wire with an oil finish, supplied as a 2-pack. The manufacturer part number is HM0400800013M.
Where to buy SPEC extension springs worldwide?
3G Electric supplies SPEC extension springs worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine parts like the HM0400800013M to support your maintenance and production needs across 14 industrial departments.
How to select the right extension spring for an application?
To select the right extension spring, match free length, wire diameter, and O.D. to your assembly's space and load requirements. The SPEC HM0400800013M offers a 12.6 mm free length and 0.8 mm wire diameter. Consult a spring rate chart or contact 3G Electric for guidance on fit and force.
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.
