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STEMCO

Mercedes Freightliner Alliance AF-Series 1.771in No-Ream King Pin Kit STEMCO - K120A

Part number K120A

STEMCO K120A is cataloged as a QwikKit steering-knuckle kingpin kit with a double lock flat pin configuration. At family level, STEMCO describes QwikKit as a no-ream spiral-steel-bushing design and PlusKit as a no-ream, pre-sized steel-backed-bronze-bushing design. Those family descriptions do not establish this stocked kit's exact bushing material or a suitable alternative kit.

Confirm the exact application and configuration before selecting this part. Reference numbers and similar configurations do not guarantee interchange.

Specifications

Part number / SKU	K120A
Brand	STEMCO
Department	Steering
Part type	King Pin Kits
Kingpin diameter	1.771 in Conditions / details Printed kingpin dimensions; not proof of interchange
Kingpin length	9.23 in
Kingpin lock configuration	B – double lock flat
Product family	QwikKit Conditions / details Exact part is in QwikKit column; no-ream family Do not mislabel PlusKit as a reaming product
Catalog family comparison	STEMCO describes QwikKit as no-ream with spiral steel bushings and a grease-grooved king pin, and PlusKit as no-ream with pre-sized steel-backed bronze bushings. This is a family distinction, not an interchange or kit-content claim. K120A material remains unresolved. Conditions / details This part is listed in the QwikKit catalog column. Family descriptions do not confirm the exact stocked bushing material or transfer another kit’s properties. Confirm the exact axle/application, supplied-kit revision and component list against current installation instructions. Both families are no-ream; this comparison is not an installation procedure, torque specification, performance or warranty guarantee, or universal vehicle-fit statement. Do not select another kit from this family comparison alone. It does not confirm replacement suitability, reverse or multi-part interchange, identical kit contents, or packaging equivalence. K120A’s bushing material remains unresolved: its component list prints quantity 4, part 32A18-4 without material. K120A is also a listed T-handle wrench exception. Blank/NA PlusKit entries do not establish an alternative kit.
Catalog kit contents — king pin	2 × 10M63-1 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — bushing	4 × 32A18-4 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — taper lock pins	4 × 60M1-21 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — end plate / plug	4 × 45P8-4 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — o-ring gasket	4 × 92P1-37 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — bushing seal	4 × 91P1-47 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — bearing	1 × 701.4.31; 1 × 701.7.1 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — shim	6 × 80P2-5; 12 × 80P3-24 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — nut	4 × 50P19-1 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.
Catalog kit contents — lock ring	4 × 100P1-5 Conditions / details Manufacturer-listed physical kit contents; these counts are not DTBP inventory, availability, or order quantities. Component identifiers and fastener sizes are reproduced as printed; they are not complete-kit cross-reference numbers. Confirm the exact axle configuration and current supplied kit revision before installation.

Need a measurement or technical specification? Ask our parts team before choosing the part.

Cross References

Conditions applying to every reference below
Directed manufacturer lookup row: listed brand PART NO. maps to this STEMCO QWIKKIT. Not a source assertion that every listed third-party part is mutually interchangeable with every other part.
PLUSKIT/ECONO KIT cells are separate source columns retained as context, not identical-content replacement claims or transitive cross-reference closure.
Historical catalog reference only; exact axle configuration, kit contents, physical package and current applicability require confirmation. No universal truck make/model/year/engine/VIN fitment.
Public and human approval remain false; no stock, inFlow or public data was changed.
Brand / reference type	Part number	Notes
ALLIANCE AXLE	P6073300019KZ	manufacturer-listed-directed-king-pin-kit-lookup. Shared conditions also apply
ALLIANCE AXLE	P6073300119KZ	manufacturer-listed-directed-king-pin-kit-lookup. Shared conditions also apply
AUTOMANN	460.523B	manufacturer-listed-directed-king-pin-kit-lookup. Shared conditions also apply
AUTOMANN	460.538	manufacturer-listed-directed-king-pin-kit-lookup. Shared conditions also apply
AUTOMANN

Fitment help

Source-listed applications — confirm configuration

Fitment notice

These source-qualified listings are not a fitment guarantee. Confirm the engine, OE number, installed equipment, mounting/configuration and VIN before selecting a part. Missing years or models have not been verified.

North American semi-truck models first where identified; consecutive listed years grouped without filling gaps.
Make	Model	Years
Not stated	Alliance AF-10.0-3, AF-12.0-3, AF-13.0-3, AF-13.3-3, AF-14.7-3 Axle/OEM-specific, not all vehicles of listed make Catalog does not establish unrestricted model-year fitment Original source conditions Alliance AF-10.0-3, AF-12.0-3, AF-13.0-3, AF-13.3-3, AF-14.7-3 Axle/OEM-specific, not all vehicles of listed make Catalog does not establish unrestricted model-year fitment	Not stated

Applications not listed here have not been verified.

Compare the number on your existing part. If you’re unsure, our parts team can help check the match before you order.

Detailed product and selection notes

Exact part is in QwikKit column; no-ream family Do not mislabel PlusKit as a reaming product

This part is listed in the QwikKit catalog column. Family descriptions do not confirm the exact stocked bushing material or transfer another kit’s properties. Confirm the exact axle/application, supplied-kit revision and component list against current installation instructions. Both families are no-ream; this comparison is not an installation procedure, torque specification, performance or warranty guarantee, or universal vehicle-fit statement. Do not select another kit from this family comparison alone. It does not confirm replacement suitability, reverse or multi-part interchange, identical kit contents, or packaging equivalence. K120A’s bushing material remains unresolved: its component list prints quantity 4, part 32A18-4 without material. K120A is also a listed T-handle wrench exception. Blank/NA PlusKit entries do not establish an alternative kit.

The dimensional table lacks an explicit general inch-unit header; no diameter or length is repeated in the new lead. Family membership alone does not authorize variant interchange or installation.

K120A bushing material remains unresolved; preserve the T-handle exception and blank/NA alternate-kit limits in the full bound qualifier.

STEMCO describes QwikKit as no-ream with spiral steel bushings and a grease-grooved king pin, and PlusKit as no-ream with pre-sized steel-backed bronze bushings. This is a family distinction, not an interchange or kit-content claim. K120A material remains unresolved.

Part type: King Pin Kits
Department: Steering

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K120A