5/8 INCH SQUARE PLASTIC CAP
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- Buy 50 or more $0.31 Save 18%
- Buy 100 or more $0.27 Save 29%
5/8 Inch Square Plastic Cap
Provide a clean, finished look and protect your 5/8" square tubing with our industrial-grade plastic caps. These durable caps press-fit securely to prevent the ingress of dirt and moisture while safeguarding against sharp metal edges, making them an essential finishing component for fabrication projects.
- High-Impact LDPE Plastic
- For 5/8" Outer Dimension Square Tubing
- Finishing, Protection, Safety
- Weather & UV Resistant
Our 5/8 Inch Square Plastic Caps are manufactured from high-quality, resilient Low-Density Polyethylene (LDPE). This material is selected for its excellent durability, impact resistance, and flexibility, which allows for a snug, secure fit without the need for adhesives. The plastic is formulated to resist weathering, UV degradation, and common industrial chemicals, ensuring a long service life for both indoor and outdoor applications. Its non-marking properties protect surfaces and provide a professional, finished appearance on any project.
These versatile caps are a staple for metal fabricators, MRO professionals, and manufacturers. They are primarily used to cap the ends of 5/8" square metal tubing used in fencing, gates, railings, and equipment frames. Beyond aesthetics, they provide a crucial safety function by covering sharp, cut edges. They also prevent debris, insects, and water from accumulating inside the tubing, which can lead to internal corrosion over time. They are an inexpensive and effective solution for completing projects professionally and safely.
Specifications
- Material: Industrial-Grade Plastic (Low-Density Polyethylene - LDPE)
- Standards: Meets common industrial dimensional tolerances for fit
- Strength/Tensile: High-Impact & Abrasion Resistant
- Dimensions: Designed to fit 5/8" x 5/8" OD Square Tubing
- Finish: Matte Black
- Certifications: N/A
Applications
- Fencing & Railing: Capping posts and pickets for safety and to prevent water ingress.
- Equipment Manufacturing: Finishing the ends of machine frames, stands, and supports.
- Furniture Fabrication: Providing a non-scratching foot for chairs, tables, and racks made from square tubing.
- Retail & Display: Capping the ends of display racks and fixtures for a professional look.
Target Users
Ideal for metal fabricators, fence contractors, furniture makers, and MRO teams who require a durable and aesthetic finishing solution for projects involving 5/8" square tubing.
Finish Options
These caps are typically available in a standard matte black finish, which is UV-stabilized for outdoor use and complements most metal finishes. Contact our Los Angeles industrial supply team for information on custom colors for large volume orders.
How to Measure
To ensure a proper fit, measure the outer dimension (OD) of your square tube across its flat sides. These caps are designed for a 5/8 inch by 5/8 inch OD profile. The cap's internal ribs are designed to securely grip a range of common tube wall thicknesses.
Example: If your tubing measures 0.625" (5/8") across its flat sides, this cap is the correct size.
Order Checklist
- Product name and required dimensions (e.g., 5/8" Square)
- Grade/material specification and quantity
- Cutting instructions (if applicable for tubing)
- Surface finish requirements (Standard Black)
- Certifications required (N/A for this item)
- Special handling or delivery requirements
Quick Facts
- Product
- 5/8 Inch Square Plastic Cap
- Material
- Low-Density Polyethylene (LDPE)
- Standards
- Industrial Dimensional Fit
- Key Properties
- Durable, Weather-Resistant, Press-Fit Design, Protective Finishing
- Primary Applications
- Fencing, Equipment Frames, Furniture, Railings
- Location
- Los Angeles warehouse - Same-day pickup available
Available Sizes
Our warehouse stock in Los Angeles includes a comprehensive range of square plastic caps for common tubing sizes, including 1/2", 5/8", 3/4", 1", 1.5", and 2". Bulk quantities are available for immediate pickup.
Custom sizes and cutting services are available for tubing.
Contact for Sizing


