Hole size (pin dia to fix): 2.7mm, 3.0mm or 4mm, 5mm, etc.

Plastic dome cap washers are designed for applications where appearance and safety are important. Available in white or black colors with galvanized or stainless steel washers.

• Custom designs available based on samples or drawings
• Pins should be 1/4" longer than insulation thickness for optimal results
• Secure insulation with self-locking washer, then install dome cap
• Silver dome caps are economical and can be painted
• Black dome caps preferred for black fiberglass acoustic board
• White finish washers used on ASJ faced material

HUIHAO is a manufacturer specializing in insulation fasteners and anchors. We produce various insulation pins and washers, and can create custom molds based on customer drawings. Our product range includes:

• CD weld pins and lacing anchors
• Bimetallic pins and cup head weld pins
• Quilting pins and perforated base pins
• Self adhesive pins and aluminum solar panel mesh clips
• Various self-locking washers and dome caps

Yes, we manufacture what we sell.

Typically 7-15 days for shipment.

Product size, material, surface treatment, and order quantity.

Yes, we can provide in-stock samples. Custom samples may require mold fee, which is refundable upon mass order confirmation.

• We provide CAD drawings
• Our company is ISO certified
• 20+ years of manufacturing experience in this product category