M20 x 36mm Thread Protection Nut & Washer Cap for 61mm Washer

M20 x 36mm - Non-Standard Thread Protection Nut and Washer Caps -LDPE -Black | Vital Parts - TPNWC-M20-36-64.3-B

Our Non-Standard Thread Protection Nut and Washer Caps are designed for load-bearing projects and irregular washer sizes. These caps are essential for safeguarding washers and threaded fixings from environmental damage, corrosion, and physical hazards-ideal for construction, infrastructure, marine, and agricultural use.

What are Non-Standard Thread Protection Nut and Washer Caps?

Also referred to as Screw Protection Caps, Nut Caps, Washer Caps, or Bolt Caps, these components provide a secure covering for exposed threads and non-standard washers. Unlike standard variants made to DIN 125 dimensions, these caps feature an extended flange designed to protect washers that fall outside generic specifications. Their ribbed internal design compresses during installation, offering an enhanced grip and firm hold, even under load-bearing conditions. In public or high-contact environments, they also serve to minimise the risk of cuts, scrapes, and snagging injuries caused by exposed fixings.

Key Features:

• Flanged design offers full coverage of oversized or non-standard washers
• LDPE construction withstands continuous temperatures up to 70°C
• Excellent chemical resistance to seawater, oils, greases, fuels, non-oxidising acids, and alkaline solutions
• Internal ribbed design increases clamping force on installation
• Low electrical conductivity for added workplace safety
• Helps meet health & safety requirements in public-facing installations

Key Applications and Industries

Commonly used across the UK in:

• Construction steelwork, fencing, fixings
• Power generation and utilities infrastructure
• Agricultural equipment and machinery
• Marine and coastal applications
• Bridge and civil engineering works
• Highway and road guardrail installations

Technical Specifications

• Material: Low-Density Polyethylene LDPE
• Temperature Resistance: -30°C to +70°C continuous
• Chemical Resistance: Seawater, alcohol, fuels, oils, non-oxidising acids and alkalis
• Design: Ribbed internal body with wide flanged base
• Thread Sizes: M20
• Nut Across Flats: 30mm
• Inside Height: 36mm
• Outside Diameter: 64.3mm
• Washer Diameter: 61mm
• Washer Thickness: 4.6mm

Our Non-Standard Thread Protection Nut and Washer Caps are ideal for:

• Securing and concealing oversized washers or irregular bolt assemblies
• Enhancing safety by eliminating exposed threads in public-facing areas
• Preventing thread damage and corrosion in harsh or wet environments
• Improving aesthetics and finish on industrial equipment or fixtures

Benefits:

• Protects non-standard washers and threads from corrosion and damage
• Reduces risk of injury from exposed bolt heads and sharp edges
• Maintains structural integrity by shielding key components
• Quick to install and compatible with a wide range of washer sizes
• Customisation available for unique applications

Why Buy from Vital Parts?

As a trusted UK supplier of high-quality fasteners and industrial components, Vital Parts offers a customer-first experience with benefits that include:

• Same-Day Dispatch: Fast and reliable shipping to keep your projects on track.
• Competitive Trade Pricing: Enjoy bulk discounts on larger orders to save more.
• Expert Technical Support: Our knowledgeable team is here to help with product selection and application advice.

If you need assistance selecting the right size or would like to discuss custom options, contact our expert team at 01233 713581.