FOJOO 2 Sets Lawn Mower Handle Bolts, Triangle Handle Screw Replacement for Honda Most Mowers, Universal Lawn Mower Parts & Accessories Kit

Why I reached for this kit

A missing handle knob can sideline a perfectly good mower. I’ve had more than one weekend derailed by a single fastener shaken loose into the lawn. I picked up the FOJOO handle bolt kit to solve that problem on a walk-behind mower that had lost one knob and had the other badly cracked. I also wanted a set I could keep in the garage as insurance—something that would drop into a range of mowers without fuss, tighten by hand, and shrug off wet grass and storage in a shed.

What’s in the box

The kit includes two complete sets: bolts, triangular ABS knobs, and nuts. The bolts measure 7.74 mm in diameter (roughly 0.3 in / near 5/16 in) and 47 mm long (about 1.86 in). The triangular knobs are molded from reinforced ABS and are designed for tool-free tightening. Everything is finished to resist rust; the bolts and nuts are galvanized iron, which is a sensible choice for outdoor hardware that sees moisture, fertilizer dust, and clippings.

Having two sets is thoughtful. Most mower handles use mirror-image hardware on both sides, and even if you’re only replacing one side, having a spare in the drawer means the next “where did that knob go?” moment won’t cost you a mow.

Build quality and ergonomics

The knobs are the first thing you notice. The triangular shape isn’t flashy, but it’s practical. Each face is broad enough to grip with gloved or wet hands, and the corners give you a little extra leverage without biting into your palm. Compared with star knobs, the triangle offers fewer pressure points but more surface per face—good for getting parts snug without over-torquing.

The ABS feels appropriately dense and not chalky. I’ve seen bargain knobs that flex or show sink marks near the threaded insert; these don’t. The galvanization on the bolts is even, and threads were clean out of the bag with no burrs. Threads ran smoothly into the knob; no gritty spots, no cross-threading tendency.

Installation and fit

I installed the kit on two mowers in the shop: an older Honda walk-behind whose original knobs had hardened and cracked, and a battery-powered mower that had lost a fastener mid-season. In both cases, the 7.74 mm diameter and 47 mm length were in the right neighborhood for the stock hardware. Installation was as straightforward as it gets:

• Align the handle ears with the deck brackets.
• Slide the bolt through the holes.
• Thread on the triangular knob and tighten by hand.

No wrench required. On the Honda, I reused a flat washer for smoother rotation when folding the handle; on the battery mower I ran the kit as-is. Total time: a few minutes per side, mostly wrestling the handle into alignment.

Once snug, the handle felt solid. After several mow sessions on both machines, the knobs stayed put. I’m in the habit of giving fasteners a quick check before each cut; these didn’t loosen on their own, even over bumpy sections that usually coax fasteners to move.

Compatibility considerations

The key numbers here are 7.74 mm diameter and 47 mm length:

• Diameter: 7.74 mm is essentially 0.305 in, close to 5/16 in. Many walk-behind mowers use either 5/16-inch hardware or M8 (8 mm). If your mower uses M8 holes, this bolt will still pass through and clamp fine; if it uses 5/16, it’s a very snug fit. If your handle hardware is significantly smaller (1/4 in or M6), this kit won’t fit.

• Length: 47 mm works on most stamped handle brackets with a flat washer or two. If your handle stack-up includes thick plastic bushings, accessory clamps, or oversized washers, you may find the threads a touch short. Measure your original bolts or the handle’s total thickness and compare. You want at least 2–3 full threads of engagement past the knob.

A quick test: push a 5/16 in drill bit through your handle holes. If it slides through and the handle stack is under 1.75 in thick, you’re almost certainly in the clear.

In use

The best compliment for a handle fastener is that you stop thinking about it. With the FOJOO kit installed, folding and unfolding the handle is smooth, and the knobs don’t fight you. The triangular shape lets you tighten securely without overpowering the threads, and it’s easy to “feel” when the handle is seated.

I didn’t see any binding or galling on the threads after repeated adjustments. The knobs are big enough to grip but not so large that they snag on shrubs or fencing as you maneuver around the yard.

Durability and weather resistance

Hardware at the top of a mower sees dew, blown dust, and UV. After a season’s worth of use, the galvanization shows no red rust—only the expected dulling you get as the zinc passivation loses its sheen. The ABS knobs haven’t cracked or turned brittle. I store one mower in a shed and another under a porch; neither environment is kind to plastics, so I’m encouraged by the condition so far. As with all ABS hardware, I’d avoid long-term direct sun if you can help it and give the threads a wipe-down if you mow in the rain and park the machine wet.

If you want belt-and-suspenders corrosion protection, a light dab of dielectric grease or a spritz of dry lube on the threads will keep things turning freely into next season.

Value

For the price of a couple of coffees, you get two complete sets that fit a wide swath of walk-behind mowers. The convenience of tool-free operation, decent materials, and the universal sizing make this a smart add to any DIYer’s parts bin. I also appreciate that the kit feels like an upgrade over the brittle OEM knobs some mowers ship with.

What could be better

• Length options: A 50–55 mm variant would cover thicker handle stacks and foldable joint designs without resorting to thinner washers. The 47 mm length is fine for most, but on a handle with accessory clamps I found myself right at the end of the threads.

• Knob texture: The smooth ABS is fine, but a light texture or knurl would improve grip with wet or grassy gloves.

• Thread spec clarity: The diameter is listed precisely, but an explicit callout of thread pitch (UNC vs. metric) would help those matching to an existing nut or captive insert. In practice, you’ll be using the included knob, so it’s a minor point.

None of these are deal-breakers; they’re small refinements that would make a good kit even better.

Tips for buyers

• Measure first: Confirm your handle hole diameter (5/16 in or 8 mm are typical) and stack thickness. If you’re near or beyond 47 mm, plan to skip extra-thick washers or pick a slightly longer bolt.

• Mind alignment: Don’t force the bolt through misaligned handle ears—loosen the opposite side or flex the handle slightly so the bolt slides freely. That prevents cross-threading when you start the knob.

• Add a washer: A flat washer under the knob face makes folding handles smoother and reduces wear on painted parts.

• Keep a spare in the mower bag: The second set can live in the grass catcher or tool drawer. It’s cheap insurance.

Bottom line

The FOJOO handle bolt kit does the simple things right: sensible materials, tool-free tightening, and dimensions that fit most walk-behind mower handles. Installation is quick, the knobs stay put through vibration, and weather resistance is up to the task. While I’d love a slightly longer option for thick handle assemblies and a grippier knob texture, those are nice-to-haves rather than must-haves.

Recommendation: I recommend this kit. It’s an inexpensive, reliable fix for missing or worn handle hardware and a smart spare to keep on hand. If your handle stack is unusually thick, double-check the length you need; otherwise, this kit is a straightforward, durable solution that keeps you mowing instead of hunting for a lost knob.