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Exposed threads on bolts, rods, and pipe fittings invite rust, damage, and snagged clothing. These vinyl rubber thread cover caps slip cleanly over any external thread from Φ1.5mm to Φ24mm, sealing out moisture, dust, and abrasion without tape, rags, or improvised fixes.
Made from flexible, high-hardness vinyl rubber, each cap features a smooth inner bore that grips thread crests securely. Available in 36 inner diameters — Φ1.5mm through Φ24mm in 0.5mm and 1mm increments — and sold in packs of 1, 5, 10, or 50 pieces. Blue color shown; black, red, white, clear, yellow, and green also available.
Ideal for hydraulic fittings, oil cylinders, threaded rod ends, furniture hardware, valve stems, and workshop equipment. Whether you're protecting a freshly machined thread during shipping or finishing exposed shelf bracket ends, these caps deliver a clean, professional result.
Protect freshly cut threads on rods and fittings during storage, transport, or assembly staging — no more tape or foam scraps.
Cap hydraulic fittings, oil cylinder ports, and valve stems to keep contamination out during maintenance or equipment downtime.
Finish exposed threaded rod ends on furniture, shelving, and fixtures — prevents snagged clothing and gives a clean, professional look.
Color-code threaded hardware by size or type for faster picking and reduced mis-assembly on the shop floor.
| Material | Vinyl rubber (flexible, high-hardness PVC-type rubber) |
|---|---|
| Inner Diameter Range | Φ1.5mm – Φ24mm (36 sizes: Φ1.5, 1.8, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24mm) |
| Colors Available | Blue (shown), Black, Red, White, Clear, Yellow, Green |
| Pack Quantities | 1 pc, 5 pcs, 10 pcs, 50 pcs |
| Surface Finish | Smooth, shiny inner bore; non-slip grip on thread crests |
| Key Properties | Wear-resistant, corrosion-resistant, moisture-resistant, flexible |
| Typical Applications | Hydraulic fittings, oil cylinders, valve stems, flanges, threaded rod ends, pipe nipples, furniture hardware |
Measure the outside diameter of the thread or rod. Select a cap with an inner diameter that matches or is slightly smaller (typically 0.2–0.5mm less) for a snug fit. The rubber is flexible and will stretch slightly, so a cap sized to your rod's nominal diameter generally works well. When in doubt, order one size down for a tighter grip.
Yes. The vinyl rubber material resists moisture, dust, and mild weathering, making it suitable for outdoor equipment, garden tools, and marine fittings exposed to rain and humidity. For continuous full submersion, a more specialized waterproof cap would be recommended.
We stock black, red, white, clear, yellow, and green in addition to blue. If you need a specific color or a custom mixed assortment for color-coding, contact us before ordering and we can typically accommodate small-batch requests.
The smooth inner bore grips thread crests securely and holds well under light to moderate vibration, such as on pumps, small engines, or workshop equipment. For high-vibration industrial applications, a dab of adhesive or a longer-skirt cap is recommended for added retention.
This listing is sold per size — select the inner diameter you need from the dropdown. If you need a variety pack covering multiple diameters for a project, contact us and we can build a custom assortment to suit your requirements.
All options are the same cap — the only difference is quantity. The 50-piece pack offers the best per-unit value and is ideal for production use, bulk stocking, or projects requiring many caps of the same size. The 1-piece option is great for testing fit before committing to a larger order.
Yes. The flexible rubber material allows the caps to be removed and reapplied multiple times without losing their grip, as long as they are not cut, torn, or exposed to solvents that degrade rubber. They are commonly reused during assembly staging and equipment maintenance cycles.
