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Exposed bolt ends, threaded rods, and open pipe fittings are magnets for rust, dust, and accidental damage. Whether you're protecting hydraulic fittings during shipping, capping off valve threads in storage, or simply giving your workbench a cleaner look, these vinyl rubber thread cover caps do the job instantly — no tools, no adhesive required.
Each cap is molded from durable PVC vinyl rubber with a smooth, shiny finish. Inner diameters range from Φ1.3mm to Φ24mm (approximately 0.05″ to 0.94″), covering 36 precise sizes. Available in 7 colors — Black, Red, White, Clear, Blue, Yellow, and Green — so you can color-code by size or match your equipment. Sold in packs of 10 pcs.
Ideal for threaded rods, bolts, hydraulic pipe joints, oil cylinder ends, valves, flanges, transition joints, and any circular tube or bar end that needs protection or a finished appearance.
Cap off hydraulic pipe joints, oil cylinder ends, and valve threads during maintenance or storage to prevent contamination and thread damage.
Protect threaded rods, bolts, and tube ends during shipping and assembly. Color-code by size to streamline production line organization.
Tidy up exposed bolt ends on furniture, shelving, or equipment. Keep spare hardware organized and rust-free in your workshop or garage.
Use color-coded caps to quickly identify different thread sizes in storage bins, reducing picking errors and protecting stock from corrosion.
| Material | Vinyl rubber (PVC rubber compound) |
|---|---|
| Inner Diameter Range | Φ1.3mm – Φ24mm (approx. 0.05″ – 0.94″), 36 sizes available |
| Colors Available | Black, Red, White, Clear, Blue, Yellow, Green |
| Packing Quantity | 10 pcs per pack |
| Surface Finish | Smooth, shiny molded finish |
| Key Properties | Wear resistant, corrosion resistant, dust-proof, high toughness, reusable |
| Typical Applications | Threaded rods, bolts, hydraulic pipe joints, oil cylinders, valves, flanges, transition joints, tube ends, bar ends |
| Installation | No tools required — push fit onto thread or rod end |
Measure the outer diameter of your thread or rod end in millimeters. Select a cap with an inner diameter equal to or slightly smaller than your measurement — the vinyl rubber stretches to grip snugly. For example, a Φ6mm cap fits a 6mm threaded rod. If between sizes, size down for a tighter fit.
Yes. The cap grips the outer diameter regardless of thread pitch or standard. Convert your imperial size to mm and select the nearest available size: 1/8″ ≈ 3.2mm, 1/4″ ≈ 6.4mm, 3/8″ ≈ 9.5mm, 1/2″ ≈ 12.7mm, 3/4″ ≈ 19mm, 1″ ≈ 25.4mm.
Yes. The PVC vinyl rubber is elastic and durable, allowing the caps to be removed and reapplied multiple times. The fit may loosen slightly after many cycles, but for typical storage and workshop use, they remain functional for extended periods.
The clear caps are translucent — you can generally see the thread or rod end through the material, making it easy to identify the part without removing the cap. They are not optically clear like glass, but visibility is sufficient for most identification purposes.
Black caps perform best in direct sunlight and prolonged UV exposure. Colored and clear caps may experience minor fading or yellowing over extended outdoor use, but will typically continue to provide thread protection. For permanent outdoor applications, black is the recommended color.
Yes, all 7 colors (Black, Red, White, Clear, Blue, Yellow, Green) are made from the same PVC vinyl rubber compound. The colors are purely for identification, organization, or aesthetic preference. There is no functional difference between colors of the same inner diameter size.
Yes. These caps are designed for any circular rod, tube, or pipe end — threaded or smooth. They work on hydraulic pipe joints, oil cylinder ends, valve openings, flanges, and plain bar ends. Simply match the inner diameter of the cap to the outer diameter of the pipe or rod.
