

RAM Mounts Add-A-Ball Adapter for Tough-Clamp (RAP-B-397BU) is a B-size (1") ball adapter in high-strength composite for the RAM Tough-Clamp. It is supplied with a #10-24 machine screw and nyloc nut for fixing it to the clamp, so you can replace the ball or fit an additional B-size connection. RAM lists the RAP-B-397BNHU Pin-Lock ball adapter as its core component.
📦 What's in the box – RAP-B-397BU
- Add-A-Ball adapter – B-size 1" ball, high-strength composite
- Machine screw – #10-24 × 1.25"
- Nyloc nut – #10-24
💡 You might also consider a Tough-Clamp base and a B-size double socket arm.
Key Features
- B-size 1" ball – connects to any RAM B-size double socket arm for near-infinite adjustment
- For the Tough-Clamp – fixes to the RAM Tough-Clamp with the included #10-24 screw and nyloc nut
- Lightweight composite – high-strength composite construction, only 36 g (0.08 lb)
- Load rating – up to 2 lb (0.9 kg) in standard use and 1 lb (0.45 kg) in heavy-duty use; ideal for phones, GPS units, scanners and small tablets
Compatibility
- RAM Tough-Clamp bases, e.g. RAP-B-397-2U
- All RAM B-size (1") double socket arms and ball components
Technical Specifications
| Part Number | RAP-B-397BU |
|---|---|
| Product Type | Ball adapter, B-size |
| Connection | B-size (1" / 25.4 mm) ball |
| Load Capacity | 2 lb (0.9 kg) standard use; 1 lb (0.45 kg) heavy-duty use |
| Material | High-strength composite |
| Weight | 0.04 kg (0.08 lb) |
| In the Box | Add-A-Ball adapter, machine screw, nyloc nut |
You will find matching cradles, holders and more RAM mounting parts in our Mobile Terminal Accessories collection. Planning a vehicle or forklift installation, or ordering for a whole fleet? Contact us for project support and volume pricing.
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