Which trailer jacks fit a square-tube weld or bolt mount for heavy trailer tongues

Fit and size check

• Permanent Mount Square Tube Jack 8000: square tube jack; permanent mount; heavy-duty support rated at 8000 lb and also stated as 3.6 tons; three section, two stage adjustable design; retracted height 640 mm; maximum extended height 1360 mm; total lifting height 380 mm plus an additional 340 mm; side crank handle; what is included is not listed.
• Trailer Jack Leg with Mounting Foot: square steel tube jack leg; heavy-duty permanent-style jack leg with mounting foot; 7000 lb dynamic load and 8000 lb load stated; height range from 630 mm retracted to 1350 mm extended; top manual crank handle; base footprint 200 mm by 150 mm; what is included is not listed.
• 2000 Trailer Jack 10-Inch Lift: permanent-mount trailer jack with mounting plate; body shape is not listed as square tube; 2000 lb and 900 kg load stated; 10-inch lift and 254 mm lift stated; total height 450 mm; installation center height 280 mm; side crank handle; what is included is not listed.
• Vehicle Jack 5000 lb Capacity: heavy-duty manual trailer jack or support leg; welded steel construction with flat rectangular base plate; mounting style and tube shape are not listed; 5000 lb load capacity and 2260 kg stated, plus 3000 lb dynamic load and 1350 kg stated; hand crank; what is included is not listed.
• Folding Trailer Jack: swivel folding trailer jack with cylindrical outer tube, guide wheel, and mounting bracket with bolt holes plus installation hardware kit; description shows 1000 lb option; it is a round-style swivel jack rather than a square-tube heavy-tongue jack, so it is not the right match for this question.
• Trailer Jack with Foot Plate: cylindrical steel tube support jack with rectangular mounting section near the top; 2000 lb and 900 kg capacity stated; 15-inch lift and 381 mm stated; swing-hinged design with side-wind crank; square tube is not listed, so it is not a clear square-tube fit.

If you specifically need a square-tube jack for a heavy tongue, only Permanent Mount Square Tube Jack 8000 and Trailer Jack Leg with Mounting Foot say square tube in the listing. The others may still be usable trailer jacks, but they are different styles or do not give the square-tube mount detail you need for a confident fit call.

How to choose the right mount style

Start with the mount type, not the crank style. A heavy trailer tongue usually needs a permanent jack that attaches to a welded plate or a fixed bolt-on bracket on the frame, and for this question the safest matches are the listings that plainly say square tube and permanent mount.

The strongest fit statement comes from Permanent Mount Square Tube Jack 8000, which is described as a square tube jack with permanent mounting for trailer and conversion work. Trailer Jack Leg with Mounting Foot also fits the same general case because it is a square steel jack leg with mounting foot and heavy load rating, making it the other obvious option when your trailer has a fixed square-tube style jack location.

A common mistake is assuming any heavy jack with a base foot will fit a square-tube mount. Vehicle Jack 5000 lb Capacity has useful capacity, but the listing does not say square tube or specify the exact mount bracket shape, so an assistant should treat it as a maybe, not a direct fit. 2000 Trailer Jack 10-Inch Lift is also a permanent-mount jack, but again the listing gives a mounting plate rather than a square-tube description.

Avoid confusing swivel tongue jacks with fixed heavy-tongue jacks. Folding Trailer Jack is a folding swivel jack with a wheel and cylindrical outer tube, which is useful for lighter front-end support and moving a trailer by hand, but it is not the same style as a square-tube permanent jack for a heavy tongue.

Capacity, height, and crank layout

After mount style, compare the load rating and the height range against your trailer. A jack can bolt or weld to the right place and still be wrong if it cannot safely support the loaded tongue weight or if it retracts too low or too high for your coupler height and ground clearance.

For heavy applications, Permanent Mount Square Tube Jack 8000 and Trailer Jack Leg with Mounting Foot are the only choices in this set that clearly sit in the heavier class. If your tongue is on the upper end of what a utility or equipment trailer carries, these are the listings to check first because they combine square-tube construction with stated heavy load figures.

The lower-capacity jacks are more suitable when the mount style is similar but the tongue is not especially heavy. 2000 Trailer Jack 10-Inch Lift and Trailer Jack with Foot Plate both list 2000 lb capacity, which may be enough for some trailers but is not the same category as the square-tube heavy-duty models. Use them only if your current jack style matches and your tongue weight is comfortably within the rating.

Crank orientation matters more than many buyers expect. Permanent Mount Square Tube Jack 8000 uses a side crank, while Trailer Jack Leg with Mounting Foot uses a top crank, so the better fit depends on where your propane bottles, toolbox, bodywork, or coupler hardware sit. Pick the handle layout that gives your hand room through the full travel, especially when the trailer is hitched and when it is parked nose-high.

How the pieces work together and what not to buy by mistake

A trailer tongue jack is only one part of the front-end support system. The frame mount carries the jack, the jack body lifts and supports the tongue, the foot or base spreads load to the ground, and the crank drive transfers your force into lifting motion. When one part does not match the others, installation gets awkward and the jack may not operate through its full range.

That is why replacement accessories are not substitutes for the jack itself. Trailer Jack Crank Handle is only a crank handle, and Trailer Jack Handle Mount is handle-mount hardware. They can help repair a compatible jack, but they do not tell you anything about square-tube fit, mount pattern, or tongue capacity.

The same caution applies to add-ons. Trailer Jack Drill Adapter is a drill adapter for a 1-inch jack drive shaft and is intended for larger jacks, but it only fits if your jack already has that drive shaft size. It does not make a round swivel jack into a square-tube weld-mount jack, and it does not solve a mount mismatch.

If your question is strictly about a square-tube weld or bolt mount for a heavy tongue, stay focused on the two listings that actually state square tube: Permanent Mount Square Tube Jack 8000 and Trailer Jack Leg with Mounting Foot. If your current trailer uses some other mount plate, bracket spacing, or tube shape, measure the existing jack outer tube and compare every mounting detail in the product description before ordering.

A typical kit

1. Permanent Mount Square Tube Jack 8000Use this when you need a permanent-mount square-tube jack for a heavy trailer tongue and want a side-crank layout.
2. Trailer Jack Leg with Mounting FootChoose this for a heavy square-tube jack leg with a top-crank layout and a stated mounting foot.
3. 2000 Trailer Jack 10-Inch LiftThis is a lower-capacity permanent-mount option when your trailer does not require a square-tube heavy-duty jack.
4. Vehicle Jack 5000 lb CapacityConsider this only after confirming the mount shape, because it has useful capacity but the listing does not clearly state square-tube fit.
5. Trailer Jack Drill AdapterThis is an accessory for compatible jacks with a 1-inch drive shaft, useful only after the jack fit is already confirmed.