Raj Bolt Centre

• Inner diameter (ID): 18 mm — meant to fit an M18 bolt or threaded rod

• Outer diameter (OD): Standard flat washer (DIN 125 / ISO 7089): ~34 mm OD

• Large series washer (DIN 9021): ~37–40 mm OD (for wider load distribution)

• Thickness: Typically ~3 mm, depending on the series or standard

Uses:

• Distribute clamping pressure under nuts/bolts

• Prevent surface damage or deformation

• Provide corrosion resistance in outdoor, marine, or chemical environments

Uses:

• Distributes clamping load under nuts/bolts

• Prevents surface damage

• Provides corrosion resistance in outdoor, marine, or chemical applications

• Material: Galvanized iron (mild steel with a zinc coating for corrosion resistance, usually hot-dip galvanized)
• Size: Inner diameter (ID): 10 mm- 17mm designed to fit an M10 bolt or threaded rod
• Outer diameter (OD): 10-20 mm OD

• Shape: Flat, circular disc with a central hole
• Purpose: Distributes load under a bolt or nut, prevents surface damage, and can help with sealing or spacing

Applications:

• Sealing under bolts, screws, or rivets (especially in roofing, plumbing, or electrical)

• Preventing water ingress in outdoor fixtures

• Providing a flexible buffer in clamping assemblies

• Material: Mild steel, stainless steel, galvanized steel, brass, plastic, etc.
• Standard: For metric, typically DIN 125 (plain flat washer), DIN 9021 (large OD), or DIN 127 (spring washer)

• Outer diameter (OD): Varies by washer type (standard, large, or heavy-duty)
• Thickness: Commonly 1–3 mm, but can vary