Caps and lids have been used on pottery as far back as 3100 BC, hopefully giving you an idea of how useful they can be. Granted, we're a few steps beyond using pottery as our primary container, but the idea of the cap has endured with our endless array of modern bottles, boxes and cups.



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  1. EPDM plugs are ideal for most plating and anodizing applications due to their excellent resistance to chemicals. The tapered design of these plugs allows one size to fit multiple ports while the flexible rubber material provides a tight seal.

  2. Designed to provide tight seals on both ends of threaded and non-threaded through holes. The silicone material will resist temperatures up to 600°F (316°C) and is specifically designed for powder coating and E-coating applications.

  3. Designed for those applications which require a hole to be plugged and the surrounding surface area to be masked. Typical applications include the masking of the grounding area around a threaded port.

  4. STOCKCAP Tube Insert range now includes Round & Square sizes from 13mm to 50mm, and more Rectangular sizes up to 100x50mm. STOCKCAP Tube Inserts suit a variety of wall thicknesses from 0.8 – 3.5mm.

  5. Available in 14 different dimensions, vinyl square caps can be applied quickly and easily. The vinyl material fits tightly and resists cracking or splitting. Choose from over a thousand sizes in bright colors and in both hard and soft materials.

  6. STOCKCAP has released a new range of EZ Tab Caps. EZ Tabs have an extra long pull-tab for easy installation and removal, making them ideal for applications in those hard to get to places.

  7. A unique end design makes these caps perfect for applications requiring "ease of removal." The square end acts as a knob which allows the cap to be taken off very easily. Use for protecting threads, tubing and fittings from damage.

  8. Design allows for quick and simple application. Fit is snug and conforms to a wide variety of flanged and beaded tubes. Covers are reusable and won't crack or split.

  9. T-Plugs are an excellent option when you need a low-cost, effective product to protect tubing ends, threads and ports during shipping and storage. The tapered design goes on easily and stays put.

  10. At STOCKCAP we have the industries largest range of Flexible Vinyl Caps & Plastic Tips, in-stock for immediate delivery.