What's the torque spec for the Tune M1?
Three numbers cover almost everything. The main mounting bolts torque to 8 ft-lbs (that's 96 in-lbs), which loads each one to roughly 1,000 lbs of clamping force, enough to hold the camper without deforming your truck bed. The jack-plate bracket bolts torque to 12 ft-lbs (144 in-lbs). And on the standard mount, the jam nut torques to 20 ft-lbs or more.
The 8 ft-lb main-bolt figure is the same whether you're on the standard mount or the Toyota bed-rail mount. One catch Tune calls out repeatedly: the tool depends on your specific hardware. The main bolt takes either a 7/16" or a 3/4" socket, so look at your bolt head before you reach for a socket.
The full spec table
| Fastener | Torque | Tool | Notes |
|---|---|---|---|
| Main mounting bolt | 8 ft-lbs (96 in-lbs) | 7/16" or 3/4" socket | Same on both mount types. ~1,000 lbs clamping force per bolt. Socket depends on your hardware, so check the bolt head. |
| Jack-plate / bracket bolt (M8x35) | 12 ft-lbs (144 in-lbs) | T40 torx or 5mm Allen | Not interchangeable. Check whether your bolt head takes a torx or an Allen key. |
| Jam nut | 20 ft-lbs or more | 3/4" wrench | Standard mount only. The Toyota rail mount has no jam nut. |
Every number here comes straight from Tune. I haven't added a value they don't publish, and where a spec applies to only one mount type, the notes column says so.
Standard mount vs. rail (Toyota) mount
The M1 ships with two mounting setups, and the fastener list is different between them. The gap that trips people up is the jam nut.
The standard mount uses the full set: M8x35 bracket bolts at 12 ft-lbs, the main bolt at 8 ft-lbs, a jam nut at 20 ft-lbs or more, and landing pads. The jam nut is the piece that locks everything against backing off.
The Toyota bed-rail mount is simpler: six bolts at 8 ft-lbs each, and that's the whole job. No jam nut, no separate bracket step. If you're on a Tacoma or Tundra using the rail mount and you go looking for a jam-nut spec, you won't find one, because there isn't a jam nut to torque.
The re-torque schedule (Tune's own docs conflict)
This is the one place I can't hand you a single clean answer, because Tune doesn't give one. Their materials disagree on the re-torque intervals, and rather than paper over it, here's exactly what each source says.
- Quick Start Guide (PDF): 50, 250, 500, and 5,000 miles, then quarterly.
- Official how-to video: 250, 500, 1,000, and 5,000 miles, then quarterly.
- Care & Usage page: no mileage at all, just "check that bolts remain torqued before driving."
When the manufacturer's own numbers don't line up, I default to the conservative union of both lists. Check the torque at 50, 250, 500, 1,000, and 5,000 miles, then quarterly. Nobody has ever regretted checking a mounting bolt too often. When in doubt, do it sooner.
Pulling the camper off resets the clock. Every time you remove and reinstall the M1, the mileage schedule starts over from zero. Fresh install, fresh 50-mile check.
The tool that actually fits
8 ft-lbs is 96 in-lbs, and that number is a problem for the wrench most people already own. A typical 1/2" drive click-style torque wrench is least accurate at the very bottom of its range, and 96 in-lbs sits at or below that floor. You can set the number, but you can't trust it.
Use a 1/4"-drive inch-pound torque wrench, roughly a 20 to 200 in-lb range. That puts the 96 in-lb main bolts and the 144 in-lb (12 ft-lb) plate bolts near the middle of the scale, where a click wrench is actually accurate. This is the single most useful tool call on this page.
Tune's install PDF lists the full tool set:
- Torque wrench
- 5mm Allen key
- 3/4" or 9/16" wrench
- Sockets: T40, 7/16", 3/4"
Sources
Everything above traces to Tune's own published material. Links, so you can verify:
- Tune Care & Usage — the "check before driving" guidance.
- Tune FAQ — states the torque spec is 8 ft/lb.
- Tune Owner Guides — the Camper Jack Mounting System install guide (the full spec set) and the "Tightening Mounting Hardware" video both live here.
- Tightening Mounting Hardware video — the how-to that gives the 250/500/1,000/5,000 schedule.
Get the rest of your numbers right
Torque is one column on the spreadsheet. The other is whether the loaded camper plus your gear still clears your truck's payload rating. Run your build through the payload calculator to see where you land, and if you're setting the camper up for the first time, the M1 setup guide walks the mounting and pop-up steps in order.