21 mm / 0.827 in Flat Brass Eyelet ERD0032PR

This flat brass eyelet is designed for applications requiring a large circular passage and a clean, low-profile metal rim. The 21 mm / 0.827 in opening is also commonly described as approximately 53/64 in, but the verified metric measurement should be used for technical selection.

Verified dimensional specification

Optional metal washer

What is supplied?

When should this eyelet be selected?

Select this model when the finished product needs a 21 mm / 0.827 in passage and an approximately 31.8 mm / 1.252 in visible flat rim. The commercial product number should not replace dimensional verification because similarly numbered products from different manufacturers may use different barrel and washer structures.

Washer and material-thickness selection

A washer can support the rear closing area and distribute pressure across a wider section of the material. Its suitability depends on the compressed thickness of the substrate, the 4.7 mm / 0.185 in barrel height and the closing profile produced by the setting die.

Barrel height is not the same as maximum material thickness. Sufficient barrel must remain above the material and washer for controlled rolling or flaring during installation.

Recommended installation process

1. Measure the total compressed thickness of all material layers.
2. Prepare a clean, centred hole with a compatible punching tool.
3. Insert the eyelet barrel from the visible side.
4. Place the optional washer over the barrel on the reverse side.
5. Use an upper and lower setting die matched to the eyelet profile and washer.
6. Apply pressure gradually and inspect the finished sample for rotation, splitting or material damage.

Setting-die compatibility

The die must match the 21 mm / 0.827 in opening group, 31.8 mm / 1.252 in outer profile, 4.7 mm / 0.185 in barrel and selected washer. A die labelled only with a nearby commercial number should not be assumed compatible.

An exact live die listing verified specifically for this product was not identified. Confirm compatibility using the product code before purchasing a setting die.

Typical applications

• Tarpaulins and truck covers
• Tents, awnings and shade systems
• Curtains, stage fabrics and display textiles
• Printed banners and vinyl sheets
• Protective covers and technical textiles
• Large cord passages in bags and cases

Important selection warning

No certified load rating is stated for this product. For tensioned tarpaulins, tents or hanging textiles, test edge reinforcement, eyelet spacing, pull direction and substrate strength on the finished assembly.

Brass is not the same as stainless steel. No specific corrosion-resistance classification has been verified for this model.

Related categories

• Flat brass eyelets
• Eyelets and grommets
• Eyelet setting dies and tools

Frequently asked questions

How many eyelets are supplied?

One pack contains 500 flat brass eyelet bodies.

Are washers included?

No. The metal washer is an optional selection and is not part of the basic eyelet pack.

What is the exact finished opening?

The verified inner diameter is 21 mm / 0.827 in. It is sometimes referred to commercially as approximately 53/64 in.

Can a setting die for a nearby product number be used?

Not without verification. Compare the opening, outer profile, barrel height and washer before use.

Does the 4.7 mm barrel fit 4.7 mm material?

Not necessarily. Part of the barrel is required for closing over the material and washer.

Can this eyelet be installed with a hammer?

A compatible press and matched setting die are recommended because the large profile requires controlled and even pressure.

Is it certified for permanent outdoor use?

No specific outdoor or corrosion-resistance certification is stated. Test the finish and material in the intended environment.