These Radium Engineering insulator boots slip over a ring terminal and its acorn nut to shield the connection from shorts and corrosion. They are molded from Shore 60A vinyl in black, measure 27mm long by 14mm wide by 18mm tall, and carry a 5.5mm bore for the wire alongside an 11mm bore for the acorn nut. They are compatible with all Radium Engineering fuel hats that use stainless steel electrical terminals, and ship five to a pack.
Specifications
| Type | Ring terminal insulator boot |
| Material | Vinyl, Shore 60A |
| Color | Black |
| Size | 27mm L x 14mm W x 18mm H (5 Pack) |
| Bore | 5.5mm for wire, 11mm for acorn nut |
| Quantity | 5 (5 Pack) |
| Part Number | 20-0915 |
| Warranty | 1 year limited |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
