BRASS WASHERS

Brass Washers and Pressed Washers for Sealing, Load Distribution and Electrical Bonding

Cable Glands India manufactures brass flat washers and pressed/stamped washers to DIN 125, DIN 9021, ISO 7089/7090/7093 and IS 2016 dimensions, machined from solid brass bar or punched from brass sheet coil. Washers are supplied plain, serrated and as sealing washers for cable gland entries, terminal connections, earthing joints and general electrical/mechanical fastening. Price: US$ 14.50/kilogram (FOB/CIF Indian port, ex-works Mumbai, price subject to size, thickness and finish).

Product Overview

A washer is a flat, centrally-holed disc placed under the head of a bolt, screw or nut to spread clamping load over a wider area, protect the surface finish of the clamped component, provide a smooth bearing surface for torque application, and in electrical applications, ensure reliable metal-to-metal contact for bonding and earthing continuity. Cable Glands India manufactures two principal washer types: machined flat washers, turned from solid brass bar for precise thickness and flatness control, and pressed/stamped washers, punched from brass sheet coil on power presses for high-volume, cost-effective production.

Machined flat washers (DIN 125/ISO 7089) are used where tight thickness tolerance, flatness and a clean-cut bore are required, such as precision terminal connections, torque-critical joints and calibrated sealing applications. Pressed washers are punched from brass sheet in a single die-stamping operation, making them the most economical washer format for high-volume assembly of cable glands, terminal blocks and general panel hardware.

Standard flat washers distribute clamping load and prevent the nut or bolt head from digging into softer materials such as painted panels, plastic enclosures or thin sheet metal. Larger-diameter penny/repair washers are used where the clamped material is soft, cracked, or where the bolt hole is oversized relative to the fastener.

Sealing washers, often supplied with a bonded or captive rubber/EPDM element, are used behind cable gland entries and threaded penetrations to complete the IP-rated seal between the fastener or gland body and the panel surface, preventing moisture and dust ingress into the enclosure.

Standard free-cutting brass (CuZn39Pb3) washers are used for general indoor electrical and panel work. DZR brass (CW602N/CZ132) washers are recommended for outdoor cable entries, marine deck boxes and coastal substations where long-term exposure to humidity and salt-laden air would otherwise risk dezincification of the washer over its service life.

Surface finishes include plain brass, electro-tin plating and nickel plating, selected according to the corrosion environment and compatibility with adjoining hardware, such as nickel-plated cable glands or stainless fixings.

All washers are dimensionally inspected for outer diameter, bore diameter and thickness before dispatch, with batch traceability maintained back to the raw material heat number, supporting quality documentation required by EPC contractors and utility procurement teams.

Key Features

• Machined flat washers (DIN 125/ISO 7089) and pressed/stamped washers from brass sheet
• Manufactured to DIN 125, DIN 9021, ISO 7089/7090/7093, IS 2016
• Sealing washer variant available for IP-rated cable gland and panel penetrations
• Non-sparking, non-magnetic and electrically conductive for bonding applications
• Plain, tin-plated and nickel-plated finish options
• 100% dimensionally inspected (OD, bore, thickness) before dispatch
• High-volume, low-cost production via die-stamping for pressed washers
• Custom outer diameter, bore and thickness manufactured to drawing

Machined Flat Washers for Precision Applications

Machined flat washers are turned from solid brass bar, giving tight control over thickness, flatness and bore concentricity. This precision is important in torque-critical joints, calibrated terminal connections and applications where washer thickness directly affects clamp load or electrical contact pressure.

Pressed and Stamped Washers for High-Volume Assembly

Pressed washers are punched from brass sheet coil in a single die-stamping stroke, making them the most economical format for high-volume production of cable gland kits, terminal block hardware and general panel-building fasteners, where thousands of washers of a single size are required per production run.

Sealing Washers for IP-Rated Penetrations

Sealing washers combine a brass or brass-and-rubber composite construction to compress against the panel surface around a cable gland or bolted penetration, contributing to the ingress protection (IP) rating of the enclosure entry point against dust and moisture.

Electrical Bonding and Earthing Continuity

Serrated or star washers, and plain brass washers used under earthing lugs and bonding straps, ensure reliable metal-to-metal contact by breaking through surface oxide or paint layers, which is critical to maintaining low-resistance earthing and bonding continuity across panel and enclosure joints.

Material Selection for Outdoor and Coastal Duty

Standard CuZn39Pb3 brass washers suit indoor panel and terminal work. DZR brass (CW602N/CZ132) is recommended for outdoor cable entries, marine deck boxes and coastal substations to prevent dezincification corrosion of the washer over the installation lifetime.

Custom Dimensions and Sealing Configurations

Cable Glands India manufactures washers to custom outer diameter, bore diameter and thickness, including large-diameter repair/penny washers and bonded sealing washer assemblies, based on customer drawings or samples.

Technical Specifications

Raw Material Grades

International Equivalent Standards

Product Types / Variants

Applications in Industry

Brass washers and pressed washers manufactured by Cable Glands India are used for: sealing cable gland and threaded panel penetrations to achieve IP ratings; distributing clamp load under bolts, screws and nuts in panel and enclosure assembly; ensuring bonding and earthing continuity under lugs and bonding straps; protecting painted, plastic or thin sheet-metal surfaces from fastener damage; and general OEM electrical assembly requiring a corrosion-resistant, non-magnetic washer. EPC contractors and panel builders specify brass washers wherever electrical continuity and IP-rated sealing are required together with reliable mechanical clamping.

Manufacturing Process

Quality Standards and Certifications

Cable Glands India manufactures brass washers and pressed washers under an ISO 9001 certified quality management system, to DIN 125, DIN 9021, ISO 7089/7090/7093 and IS 2016 dimensional standards. Raw brass is sourced against mill test certificates confirming chemical composition. RoHS and REACH compliance documentation is available for plated finishes on request. Salt-spray corrosion testing (ASTM B117) can be arranged for DZR and plated batches destined for outdoor or coastal projects. Please confirm the certification package required for your project at the time of enquiry.

Why Choose Cable Glands India

• In-house CNC turning and die-stamping capability for both washer formats
• Consistent OD, bore and thickness verified by dimensional inspection
• Standard and DZR brass grades stocked for indoor and outdoor duty
• Sealing washer assemblies available for IP-rated penetrations
• Export packing and documentation for direct container/LCL shipment
• Transparent per-kilogram pricing with no hidden tooling charges on standard sizes

Frequently Asked Questions

What is the difference between a machined and a pressed washer?

A machined washer is turned from solid brass bar for precise thickness and flatness, while a pressed/stamped washer is punched from brass sheet coil, offering a more economical option for high-volume assembly.

What is a sealing washer used for?

A sealing washer, often with a bonded rubber/EPDM element, compresses against the panel surface around a cable gland or bolted penetration to contribute to the IP rating of the enclosure entry.

Why are washers important in electrical bonding?

Washers, particularly serrated types, ensure reliable metal-to-metal contact under lugs and bonding straps by breaking through surface oxide or paint, maintaining low-resistance earthing continuity.

Are brass washers suitable for outdoor use?

Standard brass performs well outdoors; DZR brass grade is recommended for coastal, marine or high-humidity environments to prevent dezincification corrosion.

What is a penny or repair washer?

A penny/repair washer (DIN 9021/ISO 7093) has a larger outer diameter than a standard flat washer, used to spread load over a wider area on soft, cracked or oversized-hole materials.

Can custom washer sizes be manufactured?

Yes. Cable Glands India manufactures washers to custom outer diameter, bore diameter and thickness based on customer drawings or samples.

What certifications are provided?

Mill test certificates are issued as standard. ISO 9001 manufacturing compliance, RoHS/REACH documentation and salt-spray test reports can be provided on request.

What is the minimum order quantity?

Standard catalogue sizes are available from small trial quantities; custom sizes may carry a minimum order quantity depending on tooling requirements, particularly for pressed washer dies.

What is the price of brass washers?

Standard pricing is US$ 14.50 per kilogram (FOB/CIF Indian port), varying with size, thickness, brass grade, finish and order quantity.

What is the typical lead time for export orders?

Standard sizes in stock grades typically ship within 2-3 weeks of order confirmation; custom sizes and new pressing dies may require 4-6 weeks including first-article approval.

Equivalent Terms in Other Languages

Related Products and Linked Parts

• Brass Hex Nuts Full Nuts
• Brass Lock Nuts
• Brass Panel Nuts
• Brass Square Nuts
• Brass Flat Head CSK Head Machine Screws
• Brass Bolts
• Brass Cable Glands
• Brass Fasteners (Category)

Request a Quote

Cable Glands India supplies brass washers and pressed washers worldwide to electrical OEMs, EPC contractors, power utilities and distributors, at US$ 14.50/kilogram (FOB/CIF Indian port). Send your drawing, size, thickness and quantity requirement to sales@cableglandsindia.com or call +91 22 4344 9300 for a formal quotation and sample dispatch.