# SPTA BP604B2 6-Inch Dual Action Backing Plates, Hook-and-Loop, 5/16"-24 Thread

The 6-inch SPTA backing plate set fits compatible DA polishers for sanding, buffing, polishing, and finishing with hook-and-loop pads.

- [Original product page](https://www.ofertitastop.com/us/product/spta-bp604b2-inch-dual-action-backing)
- [View offer](https://www.ofertitastop.com/us/visit/spta-bp604b2-inch-dual-action-backing)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-31T23:59:09.958Z
- Brand: SPTA
- MPN: BP604B2
- SKU: ofertitastop-us-168869
- Category: Hardware > Tool Accessories > Sanding Accessories
- Source store: amazon US
- Active deal: Yes
- Price: 21.92 USD
- Previous price: 32.99 USD
- Discount: 34%
- Rating: 4.4 / 5
- Reviews: 42

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

The 6-inch SPTA BP604B2 backing plates pair a PU plate with a metal threaded connection for dual action polishing setups. Their hook-and-loop faces hold compatible pads, making it straightforward to switch between sanding, buffing, polishing, and finishing tasks.

Sold as a two-piece set, they’re designed for DA polishers with a 5/16"-24 spindle and support operation up to 12,000 OPM. The flexible edge helps the pad follow curved surfaces as well as flatter panels.

## Everyday use

Use a plate to attach a compatible foam, microfiber, or wool pad to a dual action polisher. The hook-and-loop surface keeps the pad in place during work and allows it to be removed for a change of pad or task. That makes the set useful when detailing a vehicle involves more than one step, such as sanding a surface and then moving on to polishing and finishing.

The plates are suited to surface work on cars, motorcycles, trucks, SUVs, boats, and RVs. They can also be used for polishing and buffing furniture or personal decorative projects. When moving between flat panels and contoured areas, the flexible edge helps maintain pad contact with the surface. Match the polisher’s spindle to the 5/16"-24 thread, then choose a pad suited to the task.

## Technical overview

- Set: 2 backing plates
- Diameter: 6 inches
- Thread: 5/16"-24
- Maximum speed capacity: 12,000 OPM
- Material: PU plate with metal thread
- Pad attachment: Hook and loop
- Compatible pad types: Foam, microfiber, and wool

## What you’ll notice day to day

Quick pad changes are useful when a detailing session calls for different pad materials or grades. The hook-and-loop face provides a simple attachment point, while the plate’s flexible edge helps it follow curves and contours. Ventilated cooling channels are designed to help reduce heat transfer during operation, and the backing plate’s construction is intended to help reduce vibration.

The 5/16"-24 thread is the key fit detail when choosing a plate for a DA polisher. Rather than selecting a backing plate by diameter alone, check that the spindle thread matches and that the pad is compatible with the plate’s hook-and-loop face. With those parts matched, the set supports a range of sanding, buffing, polishing, and finishing jobs without requiring a different attachment style for each pad material.

## Is it worth it?

For detailers and enthusiasts who use a compatible dual action polisher, this two-plate set brings together a defined 6-inch size, a standard 5/16"-24 thread, and hook-and-loop pad attachment. Those details make it a practical choice for moving between common detailing steps and working across vehicle surfaces with foam, microfiber, or wool pads.

Choose it for a DA setup that matches the thread and speed capacity, especially when you want one backing plate format for a variety of surface-care tasks. Its flexible edge and broad range of listed applications make it a useful fit for automotive, marine, RV, and other polishing projects.

## Images

![SPTA BP604B2 6-Inch Dual Action Backing Plates, Hook-and-Loop, 5/16"-24 Thread — 1](https://www.ofertitastop.com/i/T7dZY8qMbblX75a-lonOxz0zx2VIDlMAGQ5YvAd-JLZ7XUriVKCrAKeSJwH5uezp-n-rl579yDFujgpajNRQkxzZgAWEXA-0pDjfFJiEKn28S-R2S7xYnJX0-w.jpg)

![SPTA BP604B2 6-Inch Dual Action Backing Plates, Hook-and-Loop, 5/16"-24 Thread — 2](https://www.ofertitastop.com/i/A-tCmhYnBEEakx6koEExp156OrcS4zmmqIa_Ft94ioGATovBobbTRoqF-wHxfIvM8TWFtKxhc0rjEpdEIGO3cw2_2rBqk8TVcbOCII449xz3HYbLjXal34Qxng.jpg)

![SPTA BP604B2 6-Inch Dual Action Backing Plates, Hook-and-Loop, 5/16"-24 Thread — 3](https://www.ofertitastop.com/i/sAEudIsm0AcQYNXq7eU0KnuAEsgo_QONO1WUpXRIBigjG4LDc6DbYg420L-snUB64EVCBey60kptszZGsr2svgA3chW6unf1ITyM31TD7GOVh3L9a9OnPuxPyQ.jpg)

![SPTA BP604B2 6-Inch Dual Action Backing Plates, Hook-and-Loop, 5/16"-24 Thread — 4](https://www.ofertitastop.com/i/S6o0WOYP11wtHxeqiUisnSCifa-9K7lVRwjTDxZRgGXEcG4fS0-nu9Or-XMerogK-wWhokSiHFStGx8AEThq8CFSI9aVqLzprTa_a32TsmJR9JYavRuCB4wryA.jpg)

![SPTA BP604B2 6-Inch Dual Action Backing Plates, Hook-and-Loop, 5/16"-24 Thread — 5](https://www.ofertitastop.com/i/TcgR-ijaVzXc6Ja2U9SEPcCr4H1B7ZDNdVZipGdBufvMG_WTEmg6tBmMx2spP-9tHRcnJ22YUwHLcMcQmQDOiFloh3lQKPXkp_VtNej-8rtenTF5QrQX1yrwUA.jpg)