Conversion Chart

Std Washer Delta Protekt M33(1-1/4)x48.5x5.8

NORD-LOCK - M33(1-1/4) (Box=25)
Stock Code:
WNHTDDM33
$68.53 incl GST

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Description

DESCRIPTION

Standard Washer Delta Protekt M33(1-1/4)x48.5x5.8

(Price per unit)

Nord-Lock is the Swedish inventor / manufacturer of the wedge-locking fastener security system.

  • Nord-Lock Washers are a locking washer system made from two matching washers.
  • They feature radial teeth on the outer surfaces and cam surfaces on the inner faces.
  • When installed correctly, the cam angle is greater than the bolt thread pitch.
  • If the bolt attempts to rotate loose, the washer design forces the bolt to move upward instead, increasing tension and preventing loosening.
  • This creates a secure joint that remains tight even under severe vibration and dynamic loading.

Benefits

The patented wedge-locking system prevents fasteners from loosening when exposed to vibration and dynamic forces.

  • It works by using a wedge-locking effect to maintain joint security.
  • The design does not rely on additional components such as:
    • Springs
    • Thread-locking adhesives
    • Nylon locking inserts
  • This provides a reliable mechanical locking solution for applications where fastener integrity is critical.

Common Applications:

  • Heavy machinery and industrial equipment
  • Mining operations
  • Wind turbine structures
  • Railway and transport systems
  • Other safety-critical bolted connections where loosening cannot be tolerated.

Available Materials and Coatings:

  • Delta Protekt zinc flake coating for corrosion protection
  • A4-70 grade G316 stainless steel for harsh or corrosive environments

To ensure optimum strength, corrosion resistance, and long-term performance, washers should be selected from a material compatible with the bolt and nut. For example, use stainless steel washers with stainless steel fasteners, and galvanised washers with galvanised fasteners.

Product

STANDARD WASHER
 
Finish
DELTA PROTEKT
 
Delta Protekt is a zinc-flake coating used on Nord-Lock fasteners to protect them from corrosion and provide a durable, low-friction surface for reliable bolted connections without compromising bolting performance. (Refer to guides below)
 
Size
M33(1-1/4)
 
Specification / Reference
NORD-LOCK
 
Length / Dimension
x48.5x5.8
 
Product Guides & Technical Resources
 
 
Hobson nord lock product guide
 
Types of washers
 
Washer gauge conversion chart
 
Nord-lock-wedge-locking-solutions-brochure
 
Nordlock washers user manual
 
Hobson hardness tables 
 
Hobson nordlock vibration test data
 
Nord lock junker test principle paper
 
Zinc flake coating delta protekt information
 
Antivibration test paper
 
Hobson nordlock superbolt certificate