Universal Parts 180-139 M16x1.5 flange lock nut for matching CN250 applications, showing hex body and internal threads Universal Parts 180-139 M16x1.5 flange lock nut for matching CN250 applications, showing hex body and internal threads
Universal Parts 180-139 flanged hex lock nut, angled view of the threaded opening Universal Parts 180-139 flanged hex lock nut, angled view of the threaded opening
Universal Parts 180-139 M16x1.5 lock nut showing hex flats and integrated flange Universal Parts 180-139 M16x1.5 lock nut showing hex flats and integrated flange
Universal Parts 180-139 flange lock nut, underside view showing seating surface and internal threads Universal Parts 180-139 flange lock nut, underside view showing seating surface and internal threads
Universal Parts 180-139 M16x1.5 flange lock nut for matching CN250 applications, showing hex body and internal threads
Universal Parts 180-139 flanged hex lock nut, angled view of the threaded opening
Universal Parts 180-139 M16x1.5 lock nut showing hex flats and integrated flange
Universal Parts 180-139 flange lock nut, underside view showing seating surface and internal threads

Universal Parts

Universal Parts M16x1.5 Flange Lock Nut - CN250 Engines

SKU 180-139
$3.00 Sold out
Shipping calculated at checkout.

Expected back in stock: Oct 28, 2026

Description

Finish your repair with the right hardware instead of reusing a damaged nut. The Universal Parts M16 × 1.5 Flange Lock Nut for CN250 applications combines a hex tool surface with an integrated flange for the matching fastening point on compatible 250cc water-cooled four-stroke engines. It's a small replacement that helps keep your maintenance project moving.

Key Features

  • Fine-Pitch Thread: M16 × 1.5 sizing for the matching threaded shaft or fastener.
  • Flanged Design: Integrated flange provides the seating surface required by the corresponding assembly.
  • Hex Tool Surface: Hexagonal body for wrench or socket access.
  • Replacement Lock Nut: For the matching lock-nut application on compatible CN250 engines.
  • Single-Piece Supply: One replacement nut for your repair.

Technical Specifications

  • Brand: Universal Parts
  • Part number: 180-139
  • Supplier reference: 2481
  • Type: Flanged hex lock nut
  • Thread: M16 × 1.5
  • Nominal thread diameter: 16mm
  • Thread pitch: 1.5mm
  • Engine application: CN250, 250cc water-cooled four-stroke
  • Engine bore: 72mm; this is an engine specification, not a nut measurement
  • Country of origin: China
  • Quantity: One nut

Compatibility

Make / platform Application
CFmoto V3 / V5 with the matching CN250-style engine fastening point
Boreem / BMS, Honda, Kazuma, Roketa, SUNL, Tank Compatible 250cc water-cooled four-stroke configurations requiring this M16 × 1.5 flanged lock nut
Other makes/models Matching CN250 engine applications

 

Match thread diameter, pitch, flange seating and nut clearance to the original hardware before ordering. Use the assembly's service specification for tightening torque; model name or displacement alone does not determine fitment.

Appearance note: Color may vary from what is pictured.
Product Diagrams
Features
  • M16 × 1.5 thread for the matching fastening point
  • Flanged hex lock-nut design
  • For compatible CN250 250cc water-cooled four-stroke applications
  • One replacement nut; color may vary
Specifications

Brand: Universal Parts; Part number: 180-139; Supplier reference: 2481; Type: flanged hex lock nut; Thread: M16 × 1.5; Nominal thread diameter: 16mm; Pitch: 1.5mm; Engine application: CN250 250cc water-cooled four-stroke; Engine bore: 72mm, not a nut measurement; Origin: China; Quantity: one nut; Color may vary
Model Fitments

Compatible CN250 250cc water-cooled four-stroke applications with 72mm engine bore: CFmoto V3/V5; Boreem/BMS, Honda, Kazuma, Roketa, SUNL, Tank and other matching configurations. Requires matching M16 × 1.5 thread, flange seating and nut clearance at the actual fastening point; verify against original hardware.
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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