Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
CURT Trailer Hitch Pin: 2 in_2 1/2 in Compatible Hitch Size, 5/8 in Pin Dia - Pin & Clips
CURTPin & Clips

CURT Trailer Hitch Pin: 2 in_2 1/2 in Compatible Hitch Size, 5/8 in Pin Dia

The CURT Trailer Hitch Pin (MPN 21581) is a steel pin and clip assembly with a 5/8 in pin diameter, zinc-plated finish, and a hitch clip included. It is compatible with Class III, IV, and V hitches for 2 in or 2 1/2…

SKU 3G-OTH-485390

Brand
CURT
Item
Trailer Hitch Pin: 2 in_2 1/2 in Compatible Hitch Size, 5/8 in Pin Dia
Category
Pin & Clips
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

CURT
Manufacturer Part Number
21581
Type
III/IV/V, Hitch Clip
Material
Steel
Finish
Zinc Plated
Pin Dia
5/8 in
Includes
Hitch Clip
Vehicle Class
V
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

CURT Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CURT Trailer Hitch Pin (MPN 21581) is a steel pin and clip assembly with a 5/8 in pin diameter, zinc-plated finish, and a hitch clip included. It is compatible with Class III, IV, and V hitches for 2 in or 2 1/2 in receiver sizes.

Frequently Asked Questions

What is the CURT Trailer Hitch Pin 21581 used for?

The CURT Trailer Hitch Pin 21581 secures a trailer coupler to a Class III, IV, or V hitch receiver. It fits 2 in or 2 1/2 in receivers and includes a hitch clip for retention. This steel, zinc-plated pin is suitable for heavy-duty towing applications across vehicle classes up to V.

What are the specifications of the CURT 21581 hitch pin?

The CURT 21581 hitch pin has a 5/8 in pin diameter, is made of steel with a zinc-plated finish, and includes a hitch clip. It is compatible with Class III, IV, and V hitches for 2 in or 2 1/2 in receiver sizes. The manufacturer part number is 21581.

Where to buy the CURT 21581 trailer hitch pin worldwide?

3G Electric supplies the CURT 21581 trailer hitch pin to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. As a global industrial solutions provider, we source and deliver genuine CURT parts and components for your towing needs.

How to install the CURT 21581 hitch pin and clip?

To install the CURT 21581 hitch pin, insert the 5/8 in diameter pin through the aligned holes of the hitch receiver and trailer coupler. Secure the assembly by attaching the included hitch clip through the hole at the end of the pin. Ensure the clip is fully engaged before towing.

Used in

Common applications for CURT
Fleet maintenance — CURT Box End Wrench (MPN 20001) for tightening hitch bolts and trailer fasteners
Construction site security — CURT Automotive Hitch Lock (MPN 23666) for securing equipment trailers and tool boxes
Warehouse operations — CURT cable locks for temporary locking of roll cages or pallet racks
Field service — CURT wrenches for on-site repair of towing equipment on service vehicles
Event logistics — CURT hitch locks for securing temporary barriers or stage equipment

CURT Products

3G Electric supplies CURT pin & clips. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from CURT

View all CURT parts →
CURT Trailer Hitch Pin: 2 in Compatible Hitch Size, 5/8 in Pin Dia, III/IV/V, 5 7/8 in Overall Lg (MPN 21579). Key specifications — Material: Steel; Vehicle Class: III; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 2 in Compatible Hitch Size, 5/8 in Pin Dia, III/IV/V, 5 7/8 in Overall Lg (MPN 21579). Key specifications — Material: Steel; Vehicle Class: III; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT Trailer Hitch Pin: 1 1/4 in Compatible Hitch Size, 1/2 in Pin Dia, I/II, 3 7/8 in Overall Lg (MPN 21404). Key specifications — Material: Steel; Vehicle Class: II; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 1 1/4 in Compatible Hitch Size, 1/2 in Pin Dia, I/II, 3 7/8 in Overall Lg (MPN 21404). Key specifications — Material: Steel; Vehicle Class: II; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT Trailer Hitch Pin: 2 in_1 1/4 in Compatible Hitch Size, 1/2 in Pin Dia, I/II/III/IV, Steel (MPN 21561). Key specifications — Material: Steel; Vehicle Class: II; Finish: Zinc Plated; Includes: 5/8 in Pin Hole Adapter; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 2 in_1 1/4 in Compatible Hitch Size, 1/2 in Pin Dia, I/II/III/IV, Steel (MPN 21561). Key specifications — Material: Steel; Vehicle Class: II; Finish: Zinc Plated; Includes: 5/8 in Pin Hole Adapter; Brand: CURT.
CURT Trailer Hitch Pin and Clip: 2 in_2 1/2 in Compatible Hitch Size, 1 in Pin Dia, Steel (MPN 45803). Key specifications — Material: Steel; Finish: Powder Coated; Includes: Clevis Pin Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin and Clip: 2 in_2 1/2 in Compatible Hitch Size, 1 in Pin Dia, Steel (MPN 45803). Key specifications — Material: Steel; Finish: Powder Coated; Includes: Clevis Pin Clip; Brand: CURT.
CURT Trailer Hitch Pin: 1 1/4 in Compatible Hitch Size, 1/2 in Pin Dia, I/II, 4 1/2 in Overall Lg (MPN 21411). Key specifications — Material: Steel; Vehicle Class: II; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 1 1/4 in Compatible Hitch Size, 1/2 in Pin Dia, I/II, 4 1/2 in Overall Lg (MPN 21411). Key specifications — Material: Steel; Vehicle Class: II; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT Trailer Hitch Pin: 3 in_2 1/2 in Compatible Hitch Size, 5/8 in Pin Dia, V, 7 5/16 in Overall Lg (MPN 21506). Key specifications — Material: Steel; Vehicle Class: V; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 3 in_2 1/2 in Compatible Hitch Size, 5/8 in Pin Dia, V, 7 5/16 in Overall Lg (MPN 21506). Key specifications — Material: Steel; Vehicle Class: V; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT Trailer Hitch Pin: 2 in Compatible Hitch Size, 5/8 in Pin Dia, III/IV/V, 5 7/8 in Overall Lg (MPN 21511). Key specifications — Material: Steel; Vehicle Class: IV; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 2 in Compatible Hitch Size, 5/8 in Pin Dia, III/IV/V, 5 7/8 in Overall Lg (MPN 21511). Key specifications — Material: Steel; Vehicle Class: IV; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT Trailer Hitch Pin: 2 in Compatible Hitch Size, 5/8 in Pin Dia, III/IV/V, 5 7/8 in Overall Lg (MPN 21505). Key specifications — Material: Steel; Vehicle Class: V; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.
CURT
CURT Trailer Hitch Pin: 2 in Compatible Hitch Size, 5/8 in Pin Dia, III/IV/V, 5 7/8 in Overall Lg (MPN 21505). Key specifications — Material: Steel; Vehicle Class: V; Finish: Zinc Plated; Includes: Hitch Clip; Brand: CURT.