Latch Pivot Pin: Diameter 8-20 mm (standard range)

Component Specifications

Definition

The Latch Pivot Pin is a critical cylindrical component within safety hook assemblies that serves as the rotational axis for the latch mechanism. It allows the latch to swing open and closed while maintaining precise alignment and load-bearing capacity. This pin is subjected to shear forces during operation and must maintain dimensional stability under varying loads and environmental conditions to ensure reliable safety hook functionality.

Working Principle

The pin functions as a fixed rotational axis, allowing the latch to pivot around it. When the safety hook engages, the latch rotates around this pin to lock onto the load point. The pin's precise diameter and surface finish minimize friction while maintaining structural integrity, ensuring smooth operation and preventing unintended disengagement.

Materials

Typically manufactured from alloy steel (such as 4140 or 4340) or stainless steel (such as 316 or 17-4 PH) with heat treatment (quenching and tempering) to achieve Rockwell hardness of 40-50 HRC. Corrosion-resistant coatings like zinc plating or black oxide may be applied for environmental protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	25-80 mm
Diameter	8-20 mm (standard range)
Tolerance	h7/g6 fit
Load Capacity	2-10 kN (depending on size)
Shear Strength	≥400 MPa
Surface Finish	Ra 0.8-1.6 μm

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 2768-m, DIN 6325, ISO 898-1

Parent Products

This component is used in the following industrial products

Safety Hook

A safety hook is a specialized lifting accessory integrated into jib cranes, designed with a positive locking mechanism (such as a spring-loaded latch or safety catch) to prevent accidental disengagement of slings, chains, or other lifting attachments from the crane hook during material handling operations.

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Engineering Analysis

Risks & Mitigation

Shear failure under overload
Corrosion leading to seizure
Wear causing increased play and misalignment
Improper installation causing binding

FMEA Triads

Trigger: Material fatigue from cyclic loading
Failure: Fracture or permanent deformation
Mitigation: Regular inspection schedules, proper material selection with adequate fatigue strength, and load monitoring

Trigger: Corrosion in humid or chemical environments
Failure: Increased friction, seizure, or reduced cross-sectional strength
Mitigation: Use corrosion-resistant materials/coatings, environmental controls, and protective maintenance

Trigger: Improper installation or misalignment
Failure: Binding, uneven wear, or premature failure
Mitigation: Precision machining of mating parts, proper installation procedures, and alignment verification

Industrial Ecosystem

Compatible With

Safety hooks, industrial latches, locking mechanisms, load-bearing equipment

Typical Suppliers & Equivalents

Crosby, CM, Gunnebo, RUD, Yale, Tractel

Compliance & Inspection

Tolerance

Diameter tolerance typically h7 (ISO 286), straightness within 0.1 mm per 100 mm length

Test Method

Dimensional verification with micrometers, hardness testing (Rockwell), shear load testing per ISO 14556, corrosion resistance per salt spray testing ASTM B117

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

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Manufacturers of Latch Pivot Pin

Manufacturer profiles associated with Latch Pivot Pin.

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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 primary function of a latch pivot pin in safety hooks?

It serves as the rotational axis that allows the latch to open and close smoothly while maintaining precise alignment and bearing shear loads during operation.

How do I select the right material for a latch pivot pin?

Consider the operating environment (corrosion potential), load requirements, and frequency of use. Alloy steel offers high strength for heavy loads, while stainless steel provides better corrosion resistance for harsh environments.

What maintenance does a latch pivot pin require?

Regular inspection for wear, corrosion, or deformation; lubrication with appropriate grease (if specified); and replacement if tolerances exceed manufacturer specifications or visible damage occurs.

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.

Latch Pivot Pin