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Exposed bolt ends on furniture, outdoor equipment, marine hardware, or electrical enclosures are a safety hazard and an eyesore. These nylon plastic hex nut covers snap over standard metric hex nuts and bolt ends, hiding sharp threads under a smooth domed cap — no tools required.
Made from PA66 engineering-grade nylon, each cap features a hex-shaped interior cavity that grips the nut corners by friction fit. Available in white and black, in individual sizes from M3 through M20 (approximately 0.12 in to 0.79 in), as well as full assortment sets covering the complete size range.
Use them on playground equipment, workshop jigs, boat trailer hardware, control panel terminals, office furniture, and anywhere exposed threads need a safe, finished look.
Cover exposed bolt ends on chairs, tables, shelving, and flat-pack furniture for a clean, professional finish that protects users from sharp threads.
Cap bolt ends on boat trailers, dock fittings, and outdoor equipment — nylon resists salt spray, moisture, and UV without rusting or corroding.
Insulate exposed bolt terminals on control panels, battery enclosures, and electrical cabinets — nylon is non-conductive and prevents accidental shorts.
Protect workers from sharp bolt ends on jigs, fixtures, and machinery. Also used in medical equipment, wind power installations, and office furniture manufacturing.
| Material | PA66 Nylon (engineering-grade) |
|---|---|
| Product Type | Hex Nut Cover / Protective Bolt Cap (push-on, friction fit) |
| Color Options | White, Black |
| Surface Finish | Smooth natural nylon (untreated) |
| Available Sizes | M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20 |
| Thread Standard | Metric (compatible with standard metric hex nuts) |
| Shape | Hexagonal exterior with domed top (acorn style) |
| Fit Type | Friction fit — push on by hand, no tools or adhesive required |
| Key Properties | High strength, corrosion-resistant, non-conductive, flame-retardant, non-toxic, antibacterial, anti-mold |
| Typical Applications | Furniture hardware, marine fittings, electrical enclosures, playground equipment, workshop jigs, medical equipment, outdoor hardware |
| Pack Options | See variant options (individual sizes or full assortment sets) |
These fit standard metric hex nuts from M3 through M20. The interior has a hex-shaped cavity that grips the flat sides of the nut. Select the size that matches your bolt diameter. If unsure, measure the flat-to-flat width of your nut — contact us if you need sizing guidance.
No adhesive is needed for most applications. The nylon material has slight flexibility and grips the nut corners by friction fit. For high-vibration environments such as machinery or boat engines, a small amount of silicone adhesive inside the cap adds extra security. For furniture, shelving, and light outdoor use, friction fit is generally sufficient.
Yes — nylon is naturally corrosion-resistant and holds up well against moisture, salt spray, and general outdoor exposure. Prolonged direct UV exposure may cause slight fading over time, but structural integrity is generally maintained. These are commonly used on dock hardware, boat trailers, and outdoor playground equipment.
Yes. PA66 nylon is an excellent electrical insulator. These caps are suitable for covering exposed bolt terminals on control panels, battery enclosures, and electronic equipment to prevent accidental contact and shorts. They are non-conductive and non-toxic.
Currently black and white are the standard stock colors. Black is popular for dark equipment and machinery; white blends into appliances and light-colored furniture. For custom colors or large quantity orders, please contact our customer service team.
Individual size options (e.g., M6-White Nylon) let you order a specific size in the quantity you need. The set options (White Nylon Set / Black Nylon Set) include an assortment covering multiple sizes — ideal if you work across different bolt sizes and want a variety on hand. Check the variant description for the exact sizes included in each set.
Yes — PA66 nylon is inherently flame-retardant and meets general engineering plastic safety standards. This makes these caps suitable for use in electrical enclosures, control panels, and industrial equipment where fire safety is a consideration.
Yes. These caps are non-toxic, antibacterial, and anti-mold, making them suitable for use on children’s playground structures and furniture. They cover sharp bolt ends that could otherwise cause cuts or scrapes, and the smooth domed exterior is safe to touch.
