Hitch Pins: Component Specs, Materials & Applications

Component Specifications

Definition

Hitch pins are cylindrical fastening components designed for rapid attachment and detachment of implements, attachments, or trailers to machinery hitches. They feature a spring-loaded locking mechanism (typically a lynch pin or hairpin clip) that passes through a cross-drilled hole to prevent accidental disengagement during operation. These pins are engineered to withstand shear forces, vibration, and dynamic loads while maintaining secure connections in demanding environments.

Working Principle

Hitch pins operate on a simple mechanical locking principle: a cylindrical pin is inserted through aligned holes in the hitch receiver and implement tongue. A spring-loaded locking mechanism (such as a lynch pin, hairpin clip, or cotter pin) is then inserted through a perpendicular hole in the pin shaft, creating positive mechanical retention that prevents axial movement. This allows for quick connection/disconnection while maintaining safety under load.

Materials

Typically manufactured from medium-carbon steel (AISI 1045, 4140) or alloy steel, often with zinc plating, hot-dip galvanizing, or powder coating for corrosion resistance. High-strength applications may use heat-treated alloy steels (e.g., 4340) with tensile strengths exceeding 150 ksi.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Finish	Zinc-plated, galvanized, or painted
Length Range	2-12 inches (50-300 mm)
Load Capacity	5,000-50,000 lbs shear strength
Diameter Range	0.5-2.5 inches (12.7-63.5 mm)
Locking Mechanism	Lynch pin, hairpin clip, or R-clip

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 23429, DIN 1481, ASABE S278.6

Parent Products

This component is used in the following industrial products

Implement Hitch

A mechanical interface that connects agricultural implements to tractors or other power units.

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Engineering Analysis

Risks & Mitigation

Shear failure under overload
Corrosion leading to seizure
Improper locking causing disengagement
Wear at contact points reducing retention

FMEA Triads

Trigger: Exceeding rated shear load
Failure: Pin shears at stress concentration points
Mitigation: Implement load monitoring systems and use pins with appropriate safety factors

Trigger: Corrosive environment without proper protection
Failure: Pin seizes in receiver, preventing removal
Mitigation: Specify corrosion-resistant coatings and implement regular maintenance schedules

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.005 inches on diameter, H8/g6 fit for standard applications

Test Method

Shear testing per ASTM F606, corrosion resistance per ASTM B117 salt spray test

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Hitch Pins

Manufacturer profiles associated with Hitch Pins.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between hitch pins and lynch pins?

Hitch pins refer to the complete assembly including the cylindrical pin and locking mechanism, while lynch pins specifically describe the spring-loaded locking clip used to secure the pin.

How do I select the correct hitch pin diameter?

Match the pin diameter to the hitch receiver hole specifications, considering both clearance fit and shear strength requirements for your application's load capacity.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Hitch Pins