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Nuts, Bolts, Screws & Washers (Tohatsu)

M8 Nylon Lock Nut – 930403-0800

Brand: Tohatsu

SKU: 930403-0800

$6.20
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The Genuine Tohatsu Nylon Lock Nut 930403-0800 is an original equipment replacement fastener for selected Tohatsu outboard motor assemblies. Featuring a nylon locking insert, this nut is designed to resist loosening caused by vibration and movement. Used in selected mounting, rigging and bracket applications, it is suitable for replacing worn, damaged or corroded original nuts during servicing and repairs, helping maintain secure attachment of compatible components.

Key benefits

Key Benefits

  • - Genuine Tohatsu OEM replacement lock nut.
  • - Nylon locking insert helps resist vibration-related loosening.
  • - Nominal M8 metric thread.
  • - Suitable for selected outboard mounting and rigging assemblies.
  • - Ideal for replacing damaged or worn original lock nuts.
  • - Supplied individually.

Compatible Tohatsu Outboard Motors

  • 2-Stroke Models
  • - Tohatsu M2.5A2 – 2.5HP
  • - Tohatsu M3.5A2 / M3.5B2 – 3.5HP
  • - Tohatsu M9.9D2 – 9.9HP
  • - Tohatsu M15D2 – 15HP
  • - Tohatsu M18E2 – 18HP
  • - Tohatsu M30A4 – 30HP
  • - Tohatsu M115A2 / M120A2 / M140A2 – 115HP–140HP
  • 2-Stroke TLDI Models
  • - Tohatsu MD40B2 – 40HP
  • - Tohatsu MD50B2 – 50HP
  • 4-Stroke Models
  • - Tohatsu MFS2.5C – 2.5HP
  • - Tohatsu MFS3.5C – 3.5HP
  • - Tohatsu MFS4C / MFS5C / MFS6C – 4HP–6HP
  • - Tohatsu MFS8A3 / MFS9.8A3 – 8HP–9.8HP
  • - Tohatsu MFS15E / MFS20E – 15HP–20HP
  • - Tohatsu MFS25D / MFS30D – 25HP–30HP
  • - Tohatsu MFS115A / MFS140A / MFS150A – 115HP–150HP

Cross-Reference & Superseded Part Numbers

  • Current Genuine Tohatsu Part Number
  • - 930403-0800 / 9304030800M – Current genuine nylon lock nut.
  • Previous / Superseded Part Numbers
  • - 3V1613240M
  • - 930103-0800 / 9301030800M
  • - 930106-0800 / 9301060800M
  • - 930113-0800 / 9301130800M
  • - 9301E3-0800 / 9301E30800M
  • - 930406-0800 / 9304060800M
  • - 930446-0800 / 9304460800M
  • - 9304K-0800 / 9304K0800M
  • - 931130800M

Important Fitment Information

  • - Current part number: 930403-0800.
  • - Thread: M8 × 1.25, confirmed in Tohatsu parts catalogues.
  • - MD40B / MD50B: Steering bracket assembly uses two nuts with stud bolts 915213-0845 and washers 940103-0800.
  • - MFS8A3 / MFS9.8A3: Used in the rigging bolt set with bolt 9101E3-0885 and washer 9401E3-0800.
  • - MFS4C / MFS5C / MFS6C: Identified in multiple mounting assemblies.
  • - MFS25D / MFS30D: Used in selected manual tilt and tiller handle assemblies.
  • - Sold individually.
  • - Washers, bolts and studs are supplied separately.
  • - Confirm the original nut, engine model and assembly before ordering.
  • - Replace the nut if its nylon locking insert is damaged or no longer provides sufficient resistance.
  • - Tighten to the manufacturer's specified torque.

Signs the Nut Needs Replacing

  • - Worn or damaged nylon locking insert.
  • - Damaged or stripped internal threads.
  • - Corrosion or deterioration.
  • - Rounded nut flats.
  • - Nut repeatedly loosens during operation.
  • - Missing original locking nut.

Shipping

Ships Australia-wide