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Coarse Retired JIS Hex Nut

Steel Low Carbon

Special Large Wrench

SKU: 00-NJ-Wrench-Z
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Detail & Specs

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Retired JIS Hex Nut / Coarse + Extra Coarse

Manufactured to retired a JIS / Japanese Industrial Standard (1960s & earlier), these hex nuts have an extra coarse thread pitch and/or an oversized wrench size. Commonly used on drum sets, bicycles, motorcycle, and automobile (Porsche) assemblies.

Dimensional Differences

The industry wide manufacturing specifications used today for JIS and DIN/ISO hardware has different dimensions than these retired JIS nuts.

*Please double check your thread pitch prior to ordering.*

M3X0.6, 6mm wrench retired / M3X0.5, 5mm wrench used today

M4X0.75, 8mm wrench retired / M4X0.7, 7mm wrench used today

M5X0.9, 9mm wrench retired / M5X0.8, 8mm wrench used today

M8, 14mm wrench retired / M8, 12 & 13mm wrench used today

Wrench Tolerance

*Tolerance +0/-0.2mm*


Zinc Plated and Yellow Zinc Plated finishes provide corrosion resistance without sacrificing strength. Black oxide provides minimal corrosion resistance, best for dry environments. Chrome plated nuts are commonly used on cars, motorcycles and boats due to their shiny, sleek, professional finish.