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Rilsan Coated Fasteners

Commonly used in the water industry to mechanically compress seals on pipeline flanges, valves, reducers and pumps, Rilsan bolts, nuts and washers offer long term corrosion protection, UV stability and are designed to work in harmony with many of the associated products and systems.


• Environmentally sound.
• No volatile organic compound release.
• High performance corrosion resistance.
• Resistant to high levels of deformation.
• Renewable raw material of plant origin.
• UV resistant.


WRAS Approved Product
Grade 4.6
Bolts to DIN 601
Nuts to DIN 555
Washers to DIN 125A


Standard sizes ex-stock.
Specials available on enquiry.

Technical Support

As a manufacturer we technically support all the products that we offer which: -

• Saves time.
• Saves long term expense.
• Reduces leakage.
• Increases flange integrity.
• Decreases health & safety risk.

Whenever there is a sealing issue or technical question regarding one of our products then please get in touch on 0141 620 1666, Email us or simply fill out our online enquiry form below..

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WRAS Approved Product


Contact William Johnston & Company Limited

For more information about our Rilsan Coated Fasteners products that are available world wide, contact us on +44 (0)141 620 1666, Email us or simply complete our online Enquiry Form.

Please note, failure to select the correct materials or products we supply (“the Products”) may result in damage to plant, equipment or property. In some instances, it may cause death or personal injury. We are not designers and do not give advice about design related matters concerning the Products. We can help and assist with the technical specifications for the Products. In specific applications, particularly where critical conditions exist, we will try to assist you within the limitations of the services that we offer. All information supplied by us is intended as technical co-operation outlining the specifications of the different Products which we supply. To the extent permitted in law, no warranty is given in respect of any information supplied by us. The customer must satisfy themselves as to the suitability of the Products for their intended application and use. The correct fitting of Products is the responsibility of the customer. Your statutory rights remain unaffected. Save in respect of death, personal injury or fraud, our entire liability to you, however arising from the supply of Products shall be limited to the £10M indemnity amount provided by our insurers.

William Johnston Accreditation