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Selecting the correct extended neck washer grommets is crucial for ensuring a watertight seal and preventing leaks in your plumbing system. These specialized components are designed to accommodate thicker pipes or fittings, offering enhanced flexibility and durability where standard grommets might fall short. Investing in quality grommets can save you from costly repairs and water damage down the line.
DIMENSIONS IN INCHES: Hole Size: 3/16 Flange Diameter: .425 Length Under Flange: .135 Metal Thickness: .009 Flanger Diameter: .425 Length Under Flange: .125 Metal Thickness: .010
HIGH QUALITY - All products are rigorously inspected in-house to yield near-zero defect rates.
RICH HISTORY - Founded in 1852, Stimpson produces the largest variety of standard and special eyelets, grommets, washers and hole plugs of any single company in the world.
Finishes: Plain Brass, Dull Black Chemical Finish and Nickel Plated
Industries: Industrial Fabrics, Commercial Printing & Signage, Marine, and more
DIMENSIONS IN INCHES: Hole Size: 3/8 Flange Diameter: .750 Length Under Flange: .500 Metal Thickness: .012 Inside Diameter: .437 Outside Diameter: .770 Metal Thickness: .010
HIGH QUALITY - All products are rigorously inspected in-house to yield near-zero defect rates.
RICH HISTORY - Founded in 1852, Stimpson produces the largest variety of standard and special eyelets, grommets, washers and hole plugs of any single company in the world.
Industries: Industrial Fabrics, Commercial Printing & Signage, Marine, and more
Technical Note: Setting your self-piercing grommet and washer is easy with Stimpson’s corresponding 405 Bench Press or the 405/479 tooling
DIMENSIONS IN INCHES: Hole Size: 3/16 Flange Diameter: .425 Length Under Flange: .135 Metal Thickness: .009 Flanger Diameter: .425 Length Under Flange: ..125 Metal Thickness: .010
HIGH QUALITY - All products are rigorously inspected in-house to yield near-zero defect rates.
RICH HISTORY - Founded in 1852, Stimpson produces the largest variety of standard and special eyelets, grommets, washers and hole plugs of any single company in the world.
Finishes: Plain Brass, Dull Black Chemical Finish and Nickel Plated
Industries: Industrial Fabrics, Commercial Printing & Signage, Marine, and more
PRECISION ENGINEERED MACHINE PARTS: Our grommet dimensions are: (Grommet Dimensions) Hole size: 3/8 in. Flange diameter: .750 in. Length under flange: .200 in. Metal thickness: .010 in. (Washer Dimensions) Inside diameter: .437 in. Outside diameter...
VERSATILE SOLUTION FOR MULTIPLE APPLICATIONS: Stimpson Co.'s grommet kits are great for industrial, government, military, medical and safety applications. Our catalog includes plain grommets, grommets with teeth, long neck grommets, rolled rim brass, and...
RELIABLE, DURABLE, & EASY-TO-INSTALL: Stimpson's metal grommets are designed for easy setting alongside our coinciding 405 Bench Press Grommet Machine. Our durable construction ensures long-lasting performance for all your projects.
HEAVY DUTY FOR PARAMOUNT CONDITIONS: Stimpson's self-piercing kit includes 500 heavy duty, marine-grade 304 stainless steel grommets. Rigorously inspected in-house, we offer grommets for tarps, canvases, banners, and more meant to withstand tough...
RICH HISTORY: For over 170 years, Stimpson Co. has set the standard with quality stainless steel grommets. Our hole plugs, washers, eyelets and grommets ensure secure fastening for a wide variety of projects.
DIMENSIONS IN INCHES: Hole Size: 3/16 Flange Diameter: .425 Length Under Flange: .135 Metal Thickness: .009 Flanger Diameter: .425 Length Under Flange: ..125 Metal Thickness: .010
HIGH QUALITY - All products are rigorously inspected in-house to yield near-zero defect rates.
RICH HISTORY - Founded in 1852, Stimpson produces the largest variety of standard and special eyelets, grommets, washers and hole plugs of any single company in the world.
Finishes: Plain Brass, Dull Black Chemical Finish and Nickel Plated
Industries: Industrial Fabrics, Commercial Printing & Signage, Marine, and more
Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Extended Neck Washer Grommets
Understanding Extended Neck Washer Grommets
Extended neck washer grommets are designed to provide a more robust and secure seal than standard grommets, particularly in applications involving thicker materials or where additional clearance is needed. Their longer neck allows them to seat more deeply into the surrounding material, creating a superior barrier against water or other fluids. They are commonly found in various plumbing fixtures, appliances, and industrial equipment where reliable sealing is paramount.
Key Features to Consider
Material: Grommets are typically made from rubber, EPDM, neoprene, or silicone. The material choice impacts flexibility, temperature resistance, and chemical compatibility. EPDM is often preferred for its excellent weather and water resistance, while silicone offers a wider temperature range.
Size and Dimensions: Measure the diameter of the hole you need to seal and the diameter of the pipe or component passing through it. Grommets are specified by their inner diameter (for the pipe), outer diameter (for the hole), and neck length. Ensure the extended neck length is sufficient for your specific application.
Durometer (Hardness): This measures the rubber's hardness and affects its sealing ability and durability. A higher durometer generally means a harder, more rigid grommet, while a lower durometer indicates greater flexibility.
Shape: While most are circular, some specialized applications might require different shapes. Ensure the grommet's profile matches the contour of your installation for optimal contact.
Installation Tips
Proper installation is key to the grommet's effectiveness. Ensure the hole is clean and free of debris before inserting the grommet. A small amount of lubricant compatible with the grommet material can ease insertion and prevent tearing. Once inserted, ensure the grommet is seated evenly and creates a tight fit around the passing component.
Frequently Asked Questions
What is the main advantage of an extended neck grommet?
The primary advantage of an extended neck grommet is its ability to create a more secure and deeper seal. This is especially beneficial for thicker pipes, materials, or applications requiring extra clearance and a more robust barrier against leaks.
How do I determine the correct size grommet?
You'll need to measure the diameter of the hole the grommet will fit into and the diameter of the pipe or component that will pass through it. Also, consider the required length of the neck for your specific application.
What materials are commonly used for these grommets?
Common materials include EPDM, neoprene, and silicone. EPDM offers good resistance to weathering and water, while silicone provides a broader temperature tolerance and flexibility.
Can I use a standard grommet if an extended neck one isn't available?
It is generally not recommended to substitute a standard grommet for an extended neck one if the application specifically calls for the latter. The extended neck provides crucial clearance and sealing depth that a standard grommet cannot match, potentially leading to leaks.
How should I clean grommets before installation?
Clean the grommet with mild soap and water, ensuring all residue is rinsed off. Allow it to dry completely before installation. Avoid using harsh chemicals or solvents that could degrade the material.
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