M20 Half Nuts (Thin Lock Nuts) Stainless Steel A2

These M20 A2 stainless steel half nuts are a thin lock nut used as a jam nut, tightened against a standard nut to lock a setting on larger threads while keeping the assembly height down.

• Also known as a thin lock nut or jam nut (locks by tightening against a standard nut)
• Manufacturing standard: DIN 439 (thin pattern)
• Thread size: M20
• Thread pitch: 2.5mm (metric coarse)
• Spanner size (across flats / J): 30mm (tolerance +0/-0.84mm)
• Nut thickness (T): 10mm (tolerance +0/-0.9mm)
• Width across points: 34.64mm
• Chamfer angle: 15 to 30 degrees
• Material: A2 stainless steel, natural finish

Where M20 half nuts are used

Suitable for locking off M20 nuts on heavy brackets and plant fixings where vibration, movement or adjustment could loosen a single nut. Use as a jam nut against a standard nut to create a mechanical lock.

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