Quad Lock 360 Single Bolt M8 Base: Fit and Install FAQ
By Quad Lock USA® - Official Store | Published: 2026-11-03
Category: Guide pratiche
Straight answers on Quad Lock 360 Single Bolt M8 Base fitment, bolt replacement, anti-rotation setup, and torque-safe installation for handlebar and other M8 mounts.
Quick answer
The Quad Lock 360 Single Bolt M8 Base replaces an existing M8 bolt to create a secure mounting point for any Quad Lock 360 arm, head, or accessory. Use it when your bike, vehicle, or fixture has an M8 bolt you can swap out—and follow the anti-rotation serration and torque guidance below for a reliable install.
When an M8 single bolt base is the right choice
This base is designed for a very specific job: turning an existing M8 bolt location into a Quad Lock 360 mounting point. That makes it a strong fit for handlebar bolts, mirror stems, or accessory bolts that already use M8 threads. If your bolt is a different size, or if you need a clamp-style mount rather than a bolt replacement, this base is not the correct part—check the 360 Kit Builder for alternatives.
What the anti-rotation serration does—and why it matters
The bolt base and spacers feature anti-rotation serration. In practice, that means the mating surfaces bite into each other slightly to resist twisting once tightened. This is especially useful on a single-bolt mount, where all the holding force comes from one fastener. The trade-off is that you need to align the serrations carefully during installation; if you force the base into the wrong orientation, you can damage the teeth or leave the base loose.
Fitment limits to check before you buy
The catalog confirms compatibility with all Quad Lock 360 ARMS, HEADS, and ACCESSORIES, and that the base replaces any M8 bolt. It does not list a torque specification, a maximum stack height, or a thread pitch beyond M8. Those details depend on your vehicle or fixture, so consult your owner’s manual or a mechanic for the correct torque and thread pitch. If your bolt location is recessed or obstructed, measure clearance before ordering—this base adds thickness at the bolt head.
M8 single bolt base FAQ
- Will this base fit my handlebar bolt?
- Only if your existing bolt is M8. The base is designed to replace an M8 bolt directly. Check the bolt head size and thread pitch in your owner’s manual; if it is not M8, this base will not fit. Confirm M8 thread before ordering—this is the single most important fitment check.
- How do I install the base without it rotating?
- Clean the mating surfaces, align the anti-rotation serrations on the base and spacer with the mounting surface, and tighten the bolt to your vehicle’s specified torque. Do not overtighten; the serrations do the holding, not extreme force. Use a torque wrench if you have one—guessing can crush the serrations or strip the bolt.
- Can I use spacers with this base?
- Yes, the base is supplied with spacers that also have anti-rotation serration. Use only the spacers needed to clear obstructions, and keep the stack as short as possible to preserve thread engagement. Count your threads: aim for at least the same number of engaged threads as the original bolt.
- What torque should I use?
- The product listing does not provide a torque spec. Follow the torque value in your vehicle or component service manual for an M8 bolt of that grade. If no value is available, have a mechanic tighten it. Never guess torque on a single-bolt mount—too loose risks rotation, too tight risks damage.
- Will it work with my existing Quad Lock 360 arm and head?
- Yes. The base is compatible with all Quad Lock 360 ARMS, HEADS, and ACCESSORIES, so you can reuse the rest of your 360 setup. You only need to swap the base—no need to replace your arm or head.
Product facts
- Quad Lock 360 Base - Single Bolt - M8: Replaces any M8 bolt for a secure way to mount your device. If your bike or fixture uses an M8 bolt, you can swap it for this base without drilling or clamping.
Quad Lock 360 Base - Single Bolt - M8 - Quad Lock 360 Base - Single Bolt - M8: Compatible with all Quad Lock 360 ARMS, HEADS and ACCESSORIES. You can pair it with the full 360 ecosystem, so the base does not lock you into one arm or head style.
- Quad Lock 360 Base - Single Bolt - M8: The Bolt Base and Spacers feature anti-rotation serration for easy and secure installation. The serration helps prevent the base from twisting under vibration, which is critical for a single-bolt mount.
