Carbon Steel Parallel Key & Woodruff Key Assortment Kit | M3–M6 | 80pc or 140pc

Carbon Steel Parallel Key & Woodruff Key Assortment Kit — M3 to M6

Keep the right key on hand for every shaft. This assortment kit covers the most common metric parallel key (round-ended feather key) and Woodruff (half-moon) key sizes in M3, M4, M5, and M6 — all in a labelled plastic storage case that keeps everything sorted and ready to grab. Made from carbon steel for strength and wear resistance, these keys are precision-machined with smooth surfaces and accurate dimensions. Whether you're maintaining machinery, building drives, or working on mechanical assemblies, this kit saves time and eliminates the frustration of hunting for the right size.

Key Features

• Carbon Steel Construction — Strong, wear-resistant, and rust-inhibiting for reliable performance
• Two Kit Options — 140-piece parallel key set or 80-piece Woodruff (half-moon) key set
• Covers M3, M4, M5 & M6 — Lengths from 8mm to 30mm across the range
• Precision Machined — Accurate dimensions and smooth surface finish for proper fit
• Organised Storage Case — Plastic compartment box keeps sizes separated and easy to identify
• Broad Compatibility — Suitable for drive shafts, gearboxes, motors, and general mechanical assemblies

What's Included

• 140pc Kit: Assorted round-ended parallel feather keys — M3, M4, M5, M6 in multiple lengths (8, 10, 12, 13, 16, 19, 20, 22, 25, 30mm)
• 80pc Kit: Assorted Woodruff (half-moon) keys — M3, M4, M5, M6

Common Applications

• Drive shaft and pulley keyway connections
• Gearbox and motor shaft assemblies
• Machine tool maintenance and repair
• General mechanical and engineering workshops
• Hobbyist and prototype builds

Specifications

• Material: Carbon Steel
• Sizes: M3, M4, M5, M6
• Key Types: Round-Ended Parallel (Feather) Keys / Woodruff (Half-Moon) Keys
• Storage: Labelled plastic compartment case
• Origin: China