Steel Tube Protection Plastic Plug/Cap PFC-30x30Heavy-duty PP/PE plastic push-pull tube insert end cap for square steel fence posts and pipes. Available in multiple sizes from 20x20mm to 100x100mm.MaterialPP / PE / PVCFinishBlack (standard); White, Grey, Custom colors availableMOQ5,000 pcsKey FeaturesPush-pull design for easy installation and removal without toolsRibbed inner walls provide secure, snug fit preventing accidental removalUV-resistant PP/PE material suitable for outdoor fence post applicationsProtects tube ends from dust, moisture, insects, and corrosionAvailable in full size range: 20x20mm to 100x100mm squareCustom colors available for OEM/ODM orders (MOQ applies)Lightweight yet durable – withstands impact and temperature changesClean, flat-top finish gives professional appearance to fence postsTechnical SpecificationsSpecificationValueItem No.PFC-30X30 (also available: PFC-20X20, PFC-25X25, PFC-40X40, PFC-50X50, PFC-65X65, PFC-75X75, PFC-100X100)MaterialPP / PE / PVCColorBlack (standard); White, Grey, Custom colors on requestTube Size Range20x20mm to 100x100mm (square); custom rectangular sizes availableWall Thickness1.5mm – 3.0mm (varies by size)TypePush-pull insert (internal fit)Top StyleFlat topMOQ5,000 pcs per size/colorPackaging500–1000 pcs per carton (size dependent)CertificationRoHS compliant; food-grade material availableProduct Description<p>The PFC-30X30 Steel Tube and Pipe End Protection Plastic Plug is a high-quality push-pull type plastic cap designed to protect the open ends of square steel tubes and fence posts. Made from premium PP or PE material, these tube inserts provide excellent protection against dust, moisture, and corrosion while giving a clean, finished appearance to fence posts and structural tubes.</p> <p>These plastic end caps are widely used in the fencing industry, furniture manufacturing, and general construction applications. The ribbed inner design ensures a secure, snug fit that won't easily pull out, while the flat top surface provides a smooth, professional finish. Available in a wide range of sizes to accommodate standard square tube dimensions from 20x20mm up to 100x100mm.</p> <p>Manufactured from food-grade PP or PE plastic, these caps are UV-resistant and weatherproof, making them suitable for both indoor and outdoor applications. Custom colors and sizes are available for OEM/ODM orders with sufficient minimum order quantities.</p>FAQWhat plastic materials are used in your fence and gate accessories?We use UV-stabilized high-density polyethylene (HDPE), polypropylene (PP), ABS, and glass-filled nylon (PA66-GF30) depending on the application. All materials are RoHS compliant, free from heavy metals, and formulated to resist UV degradation, ensuring colour stability and mechanical strength for 10+ years outdoors.Are your plastic accessories suitable for outdoor and UV-exposed environments?Yes. All outdoor plastic accessories are manufactured with UV stabilizers and carbon black or pigment additives that prevent UV degradation. Our products pass 1,000-hour UV weathering tests (ASTM G154) with less than 5% change in mechanical properties. They are suitable for tropical, desert, and coastal climates.What colours are available for plastic fence accessories?Standard colours include black, white, grey, brown, and green. Custom RAL colours are available for orders of 5,000+ pieces with a colour matching fee. Black is the most UV-resistant colour and is recommended for outdoor applications. Colour samples can be provided upon request.Can plastic accessories be manufactured to custom dimensions?Yes. Custom injection moulding is available for plastic post caps, rail connectors, and decorative accessories. New mould tooling cost ranges from USD 300–1,500 depending on complexity. Prototype samples are produced within 15–20 days after mould approval. MOQ for custom plastic parts is typically 2,000–5,000 pieces.What is the operating temperature range for your plastic accessories?Our standard HDPE and PP accessories are rated for continuous use from -40°C to +80°C. Glass-filled nylon (PA66-GF30) components are rated from -40°C to +120°C, making them suitable for applications near heat sources. Please specify your climate conditions when ordering if temperatures exceed these ranges.Are these plastic tube caps compatible with steel pipes that have different finishes, such as hot-dip galvanizing, powder coating, or zinc plating?Yes, our PP/PE plastic tube inserts are designed with flexible friction ribs to accommodate the slight internal dimensional variations caused by different steel finishes. Whether your square pipes are hot-dip galvanized, powder-coated, or zinc-plated, the ribbed design ensures a secure, tight fit without scraping or damaging the internal coating. Additionally, the non-conductive plastic construction effectively seals out moisture and eliminates the risk of galvanic corrosion, regardless of the steel grade used.Do you offer OEM services, such as embossing our company logo on the plastic tube caps?Yes, we provide full OEM and ODM services and can easily incorporate your company logo onto the top surface of the plastic plugs via embossing or debossing. This customization requires a simple modification to the mold insert, which carries a minimal one-time tooling fee. Additionally, we offer custom packaging solutions, including branded polybags and barcode labels, to seamlessly support your wholesale and distribution requirements.Request a quote from HST