Mobile Home Parts Mobile Home Anchor Bolt with Nut

Why I reached for these anchor bolts

I spent a Saturday morning tightening up tie-downs on a small manufactured structure and a couple of older ground anchors. A few of the original strap bolts were chewed up from years of tensioning and weather. I swapped in this pack of black slotted anchor bolts with matching nuts and finished the job before lunch. They’re simple hardware, but they did exactly what I needed: clamp standard strapping securely and take a solid load without slipping.

What’s in the pack

You get eight slotted bolts and eight nuts. The bolts are black-finished, one size, with a knurled section along the shaft and a longitudinal slot that accepts standard strapping. The kit doesn’t include washers, plates, or instructions. For most tie-downs, that’s fine; these are intended as direct replacements for the strap bolts you’ll find on common mobile home and shed anchoring systems.

In hand, the machining looks tidy. The slot edges on my set were clean enough that they didn’t grab or fray the strap when feeding it through. The knurling is consistent and aggressive enough to bite without feeling like it’ll abrade the strap under tensioning.

Design details that matter

• Slotted shank: The slot allows you to thread the steel strap through the bolt, wrap as required by your anchor setup, and cinch it down. It’s straightforward and works with typical 1-1/4 inch strap stock. I had no trouble feeding standard galvanized strap through the slot.

• Knurled grip section: This is the standout feature. The crosshatch knurl increases friction between the bolt and strap so the strap doesn’t creep as you tension. With smooth bolts, I’ve seen a little relaxation after the first wind event; with these, the strap stayed put after an initial recheck.

• Nut fit and drive size: The nuts on my set mated cleanly to the threads, and a 15/16-inch six-point socket on a 1/2-inch drive ratchet handled the work easily. If you prefer power, a mid-torque impact will snug them quickly, but I recommend finishing by hand for control.

• Finish: The black finish looks like a paint or oxide treatment rather than a heavy zinc or hot-dip galvanizing. It resists fingerprints and installs cleanly, but plan for basic corrosion protection if you’re in a harsh environment.

Installation experience

I replaced a handful of bolts and added a couple to new anchors. My process:

1. Prep the strap and anchor: I cleaned the threads on the anchor connector with a wire brush and shot a little penetrating oil to help the new bolt start smoothly.

2. Feed the strap: With the slot facing the strap, I passed the strap through and checked that the knurled section would sit against the strap once tensioned. Alignment matters—if the knurls aren’t bearing on the strap, you lose the benefit.

3. Hand-start the threads: I always thread the nut by hand to at least a half-inch of engagement. This avoids cross-threading and gives a feel for any resistance.

4. Tension gradually: Using a six-point socket, I brought the nut up in stages, checking that the strap stayed centered in the slot and didn’t twist. I stopped short of max tension, verified alignment, then finished to final tension by feel and within the anchor manufacturer’s guidance.

5. Final checks: After all anchors were tensioned, I gave each nut a final snug and trimmed or secured any strap tails per local requirements.

Everything went smoothly. The knurling noticeably reduced the effort to keep the strap from sliding while I brought up tension. Compared with smooth-shank bolts, these took fewer “bump and re-seat” cycles as I snugged.

Performance under load

After installation, I checked tension a couple of days later and again after a windy spell. The straps held their set—no measurable creep, and the nuts didn’t back off. The bite from the knurled section does what it promises: it gives the strap something to grab, so the clamping action is more about compressive hold and less about relying on friction from smooth steel-on-steel.

Thread quality is on par with other strap bolts I’ve used. Starts were consistent, and the nuts ran down without tight spots. I didn’t encounter any galling, but I did keep threads clean and used a very light dab of anti-seize on a couple of older anchors where rust was present. If you’re working with worn or contaminated threads, that little bit of prep helps a lot.

Durability and corrosion

These are black-finished, not visibly galvanized. After a few weeks outdoors, mine showed no rusting, though that’s not a long-term verdict. In coastal or highly corrosive settings, I’d treat exposed areas with a compatible primer/paint or a cold-galv coating after installation to extend service life. For most inland environments, routine inspections and the occasional touch-up should be fine.

The knurling hasn’t chewed the strap; it’s there to grip, not cut. As with any tie-down, periodic rechecks are smart—wind, thermal cycling, and structure movement can all change tension over time.

Fit and compatibility

• Strapping: Worked with standard mobile/manufactured home strap stock in my kit. If your straps are unusually thick or vintage, check slot width before committing to a full install.

• Anchors and brackets: Direct replacement for the strap bolts on common ground anchors and foundation plates. Thread engagement and nut seating felt familiar, and the bolt length was appropriate for a few wraps of strap plus a solid bite.

• Tools: A 15/16-inch six-point socket on a 1/2-inch drive is ideal. A breaker bar helps for final set if you’re not using an impact. Avoid 12-point sockets if the nuts are tight—six-point reduces the chance of rounding.

Tips to avoid problems

• Start by hand and keep threads clean. Most “bad bolt” stories start with cross-threading or grit in the threads.

• Use a six-point socket and moderate torque. It’s easy to overdo it with an impact and damage threads.

• Consider a dab of anti-seize on older anchors, but keep it off the strap and knurled section—you want dry friction there.

• Align the strap so the knurled portion bears squarely; if the strap is off-angle, it can slip or scuff.

• Follow local code and your anchor manufacturer’s torque/tension guidance. These bolts are the hardware; the system performance depends on correct installation.

What could be better

A galvanized option would be welcome for coastal areas. Including a simple one-page install sheet with torque guidance and a note on socket size would also help DIYers. Lastly, while the threads on my set were clean, the profile is on the fine side; careless power-tightening on dirty threads can gall. That’s solvable with good practice, but it’s worth noting.

Verdict

These anchor bolts are exactly what I want for strap tie-downs: slotted, knurled, and consistent. They install fast, grip the strap well, and come in a practical eight-pack that covers most small projects with a couple spares. As long as you mind basic installation technique and consider extra corrosion protection where appropriate, they hold tension reliably and make the whole tie-down process more predictable.

Recommendation: I recommend these for anyone replacing worn strap bolts or completing a new tie-down on standard mobile home or shed anchors. They offer solid grip thanks to the knurled shank, straightforward installation with common tools, and good overall value. If you work in a marine environment, plan an extra step for corrosion protection—or look for a galvanized variant—but for most applications, these bolts are a dependable, no-drama choice.