Best Fifth Wheel Lock For End Dump: Compare 10 Kingpin Locks

#1 · Best Overall

1. AMPLock U-LPCVR

• Material: Cast Iron, Stainless Steel
• Material Type: Cast Iron, Stainless Steel

Best for: Commercial-hauler kingpin protection.

Why it ranks #1: Its listed uses include fifth-wheel trailers and commercial haulers, and its conical design uses cast iron and stainless steel.

AMPLock’s conical kingpin-lock design targets fifth-wheel trailers, semi trailers, and commercial haulers, enabling one lock approach across those stated equipment types. Cast iron and stainless steel form its specified materials, while the product information also identifies weatherproof, rust-resistant construction for outdoor security use.

The conical design is the central feature for securing the kingpin, and the listed applications include fifth-wheel trailers, semi trailers, and commercial haulers. That range makes it relevant to operators managing more than an RV, while the cast-iron and stainless-steel materials specify the lock’s construction. Weatherproof and rust-resistant details support use in exposed conditions. The package includes two keys and a tag with key information, helping keep the key set identifiable during shared equipment operations.

Skip it if you need three included keys; BOYISEN's 5th Wheel King Pin Lock lists three.

AMPLock suits operators securing fifth wheels, semi trailers, or commercial haulers who want a conical lock and weather-resistant construction. Its listed key set has two keys, a practical consideration when multiple drivers share equipment.

Listed on Amazon as: 5th Wheel King Pin Lock Heavy Duty Trailer Security – U-LPCVR

#2 · Best 2-Inch Fit

2. Equipment Lock 850017028821

• Material: Alloy Steel
• Material Type: Alloy Steel

Best for: Full-coverage two-inch pin security.

Why it ranks #2: It explicitly fits standard 2-inch kingpins and uses alloy steel with a high-security barrel lock system and full kingpin coverage.

Full coverage of a 2-inch kingpin is the defining feature of THE EQUIPMENT LOCK COMPANY’s heavy-duty lock, enabling a barrier across the pin rather than a partial cover. Its high-security barrel lock system pairs with alloy-steel construction for owners securing a fifth-wheel trailer, RV, or camper.

The stated 2-inch kingpin fit gives buyers a clear sizing boundary, while full kingpin coverage helps prevent another vehicle from hitching to the secured trailer. A high-security barrel lock system provides the locking mechanism, and alloy steel supplies the specified body material. The bright red powder-coated finish, described in the additional product information, makes the lock conspicuous when installed. Two keys are included, so operators can keep a spare available without changing the lock’s installation routine.

Skip it if you have a kingpin outside the standard 2-inch size; this lock is specified for 2-inch pins.

Pick this lock for a standard 2-inch fifth-wheel pin when full coverage, a barrel lock, and a visible red finish suit your parked trailer. The 2-inch fit is the key boundary to check against your equipment.

Listed on Amazon as: Equipment Lock Heavy Duty 5th Wheel King Pin Lock – Powder Coated Steel 5th Wheel Hitch Lock – Anti-Theft Tow Hitch Lock – Secure Fifth Wheel Lock for Theft Prevention & Security (Keyed Differently)

#3 · Best Industrial Build

3. Proven Industries PL-5

• Material: Stainless Steel
• Weight: 4 lb
• Material Type: Stainless Steel

Best for: Industrial fifth-wheel security.

Why it ranks #3: It is intended for industrial and heavy-duty fifth wheels, with a solid-steel TIG-welded collar and 303 stainless-steel pin.

A solid-steel TIG-welded collar held by a 303 stainless-steel pin gives the Proven Industries PL-5 a robust coupling-lock structure. It is specified for industrial and heavy-duty fifth wheels, letting owners of trailers, RVs, or 18-wheelers secure a coupler with a lock focused on resisting tampering.

The TIG-welded collar forms the main barrier around the fifth-wheel coupling, while the 303 stainless-steel pin holds that collar in place. The product information describes hardened steel intended to resist power tools, hammers, and crowbars, tying its material choice to a tamper-resistance purpose. Its stated fit is industrial and heavy-duty fifth wheels, so buyers should consider equipment type rather than assume a universal pin fit. The listed included component is the lock itself.

Skip it if you need a stated key count before choosing; the supplied PL-5 details list the lock but do not specify keys.

The PL-5 suits owners securing industrial or heavy-duty fifth-wheel couplers who prioritize a welded collar and hardened-steel construction. Its stated application is heavy-duty equipment, and the supplied details do not specify an included key count.

Listed on Amazon as: Proven Industries PL-5 Kingpin Lock – Fifth-Wheel Coupler Security

#4 · Best Full Collar

4. Trimax TFW80HD

• Material: Hardened Steel, Red
• Weight: 3.39 lb

Best for: Quick-locking weather-exposed trailers.

Why it ranks #4: Its full-collar design covers the kingpin, while hardened steel and a red epoxy powder coat suit demanding outdoor conditions.

The TRIMAX TFW80HD uses an easy push-button locking mechanism, enabling a quick locking routine without a keyed locking step described in its features. Its full collar helps keep grease off hands while adding a security layer, and a red epoxy powder coat is specified for rust and corrosion resistance.

A push-button mechanism supports straightforward locking, while the full collar both covers the king pin and helps prevent grease transfer to hands during handling. That combination is useful when securing a fifth wheel after uncoupling without carrying grease onto the lock. Hardened steel and the weatherproof red epoxy powder coat address physical toughness and corrosion resistance, respectively. The product includes two keys, and its 3.39-pound listed weight is worth factoring into handling and storage.

Skip it if you want three included keys; BOYISEN's 5th Wheel King Pin Lock lists three.

The TRIMAX suits owners seeking push-button operation, a grease-conscious full collar, and a corrosion-resistant finish for a parked fifth wheel. Its listed weight is 3.39 pounds, so account for handling when storing or installing it.

Listed on Amazon as: TRIMAX TFW80HD 5th Wheel King Pin Lock, Red

#5 · Best Handle

5. BOYISEN 190905

• Material: heavy duty alloy steel
• Weight: 2.2 lb
• Material Type: heavy duty alloy steel

Best for: Handle-first standard-pin users.

Why it ranks #5: The handle and outward-facing cylinder are designed for easier operation, and the package includes three keys and a warning tag.

An outward-facing cylinder and added handle give the BOYISEN king pin lock a more accessible locking and unlocking routine. Its heavy-duty alloy-steel body and blossom lock pair that handling detail with a theft-deterrence focus, while the included warning tag makes the secured trailer more conspicuous when parked.

The handle and outward-facing cylinder let you work the lock without reaching for a downward-facing mechanism, a practical convenience when securing or releasing a fifth wheel. BOYISEN specifies a fit for standard-sized king pins, so this is aimed at conventional fifth-wheel setups rather than an explicitly broad range of pin sizes. The heavy-duty alloy-steel construction and blossom lock support a security-focused parked-trailer setup; three keys provide two spares after setting one aside for backup.

Skip it if you use a nonstandard king pin; this lock is specified for standard-sized pins.

Choose this BOYISEN for a standard-sized fifth-wheel king pin when an accessible handle, visible warning tag, and spare keys matter. Its stated fit is standard-sized pins, so verify that boundary against your trailer’s pin.

Listed on Amazon as: 5th Wheel King Pin Lock, Solid Steel, with Handle and Warning Tag

#6

6. METOWARE 79846

• Material: Heavy Duty Alloy Steel
• Weight: 1.11 kg
• Material Type: Heavy Duty Alloy Steel

Best for: Warning-tag-conscious haulers.

Why it ranks #6: Its 12-inch chain and bright red warning label add a hitching reminder, and it is listed for securing fifth wheels.

A 12-inch chain connects the METOWARE lock to a bright red warning label, giving drivers a visible reminder to remove it before hitching. The lock is intended for RVs and semi trailers, and its high-strength iron body receives a double layer of electrophoretic paint for weather resistance.

The chained warning label can stay attached to the lock and be seen before hitching, helping make the removal reminder part of the coupling workflow. METOWARE specifies high-strength iron and a double electrophoretic-paint coating; together, those material and finish details support durable outdoor use. Its stated applications are fifth-wheel security for RVs and semi trailers. The listing also describes a solid, impact-resistant body with no leverage points for bolt cutters, a security consideration for parked equipment.

Skip it if you want an outward-facing handle and three included keys; BOYISEN's 5th Wheel King Pin Lock lists both.

This METOWARE option suits RV and semi-trailer owners who value a chained, conspicuous hitching reminder and a coated iron body. Consider its stated application and the single lock included when choosing equipment for your setup.

Listed on Amazon as: 5th Wheel King Pin Lock for RVs & Semi Trailers, Black

#7

7. WAR-LOK TKP-10

• Material: Alloy Steel
• Material Type: Alloy Steel

Best for: Handle-equipped untethered trailers.

Why it ranks #7: This alloy-steel kingpin lock is listed for securing untethered trailers and includes a convenient handle for operating the lock.

A convenient handle is the specified operating feature of the WAR-LOK TKP-10, enabling users to handle the kingpin lock while securing an untethered trailer. Alloy-steel construction and an anti-theft focus suit cargo-protection use, with the listing specifically naming untethered trailers as an application.

The included handle gives users a defined point to grip while placing or removing the lock, supporting the basic secure-and-release workflow. WAR-LOK specifies alloy steel and heavy-duty, anti-theft features for securing untethered trailers. The product information also frames its use around protecting cargo from tractor-related theft, making the parked or detached trailer the relevant scenario. Since the supplied specifications do not name a particular kingpin size, match the lock to the trailer setup before relying on it.

Skip it if you need a stated kingpin size before selecting a lock; this listing does not specify one.

The WAR-LOK TKP-10 suits owners securing an untethered trailer who value a handle and alloy-steel construction. Its listed use centers on detached trailers, and the supplied specifications do not identify a kingpin size.

Listed on Amazon as: WAR-LOK TKP-10 5th Wheel King Pin Lock, Anti-Theft Trailer, Heavy Duty Steel

#8

8. DC Cargo Mall King Pin Lock

• Material: Alloy Steel
• Material Type: Alloy Steel

Best for: Weather-resistant RV kingpin use.

Why it ranks #8: Its alloy-steel construction and weather-resistant feature suit trailer storage, and the listing names RV and fifth-wheel use.

Weather-resistant alloy steel gives the DC Cargo Mall lock a straightforward outdoor-security proposition for RV and fifth-wheel use. Its yellow finish makes the lock conspicuous on a parked trailer, while the product’s stated applications define it as a kingpin lock rather than a general-purpose trailer coupler device.

The alloy-steel construction supplies the specified material for securing a fifth-wheel kingpin, and the weather-resistant feature is relevant when the lock remains on equipment outdoors. DC Cargo Mall lists RV and fifth-wheel use, giving buyers a clear application category for choosing it. The yellow finish is a visible detail when approaching the hitch area, which can help make the installed lock easy to notice. The supplied details do not identify a handle or key count, so this is a fit-and-material-focused option.

Skip it if you need a listed warning tag and three keys; BOYISEN's 5th Wheel King Pin Lock includes both.

Choose this DC Cargo Mall lock for RV or fifth-wheel kingpin use when weather resistance and a visible yellow finish meet your needs. Its stated application is specific to RV and fifth-wheel security, not general couplers.

Listed on Amazon as: DC Cargo Mall 5th Wheel King Pin Lock Solid Steel – Weather Resistant, Anti-Theft Fifth Wheel Key Lock, for RV & Semi Trailers

#9

9. Jayour Heavy-Duty Lock

• Material: Alloy Steel
• Weight: 1.9 kg
• Material Type: Alloy Steel

Best for: Handle-equipped visible deterrence.

Why it ranks #9: The alloy-steel lock includes a high-visibility yellow warning tag and a handle, but its listing gives less specific fit information.

A convenient handle and bright yellow caution tag give the Jayour king pin lock two practical cues: easier handling and a visible deterrent at the trailer. Its alloy-steel construction is specified for fifth-wheel security, with the tag intended to draw attention to a locked RV, trailer, or camper.

The attached handle gives users a grip while positioning or removing the heavy-duty lock, making the locking routine easier to manage. A yellow warning tag can remain visible at the hitch and signal that the trailer is secured. Jayour specifies alloy steel and lists use for RVs, trailers, and campers, making this a broad recreational and trailer-security option. The included components identify the high-visibility tag; no key count is supplied in the product details provided.

Skip it if you require a stated key count before purchase; the supplied Jayour details do not give one.

Jayour suits trailer, RV, and camper owners who want a handled kingpin lock with a visible caution tag. Its listed use is broad, but the supplied product details leave the included key count unspecified.

Listed on Amazon as: Heavy-Duty – King Pin Lock | Strong Tough Steel | Fifth Wheel Trailer Lock | Anti-Theft for RVs, Trailers, etc | with Bright Caution Tag Deterrent and Air Freshener

#10

10. Ft. Knox Andersen Coupler Lock

• Weight: 18 lb

Best for: Andersen conversion-coupler owners.

Why it ranks #10: This 18-pound welded-steel lock is designed only for Andersen Ultimate conversion couplers, so it is not a general kingpin-lock choice.

The Ft. Knox Locks system is made specifically for Andersen Ultimate 5th Wheel conversion couplers, enabling a precise, secure fit for that particular coupler. Its heavy-duty welded steel lock comes with a Trimax puck lock, creating a full-enclosure security arrangement for trailer storage or parking.

Because the lock is specified exclusively for Andersen Ultimate conversion couplers, its narrow compatibility makes it a targeted choice rather than a general kingpin lock. The welded industrial-grade steel construction and included Trimax puck lock work together as a full-enclosure setup intended to deter unauthorized hookup. Listed protection against bolt cutters and crowbars is relevant for trailers left parked or in storage. At 18 pounds, this assembly is also a substantial item to handle and stow between uses.

Skip it if you use a standard kingpin rather than an Andersen Ultimate conversion coupler; this lock is specific to Andersen Ultimate couplers.

This Ft. Knox option fits buyers with an Andersen Ultimate conversion coupler who want welded-steel, full-enclosure security during parking or storage. It is not a general-purpose kingpin lock, so the coupler type determines whether it fits.

Listed on Amazon as: Andersen Ultimate Trailer 5th Wheel Lock with Trimax Puck Lock – Bolt Cutter & Crowbar Proof, Made in USA