Editorial Technical Reference

Container Fitting

This page explains how Container Fitting is classified within Fabricated Metal Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A forged steel fitting used to secure and lift shipping containers, enabling stacking and transport on ships, trucks, and trains.

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Product Specifications

Technical details and manufacturing context for Container Fitting

Definition

Container fittings, also known as twist locks or container locks, are critical components in intermodal transport. They are used to lock containers to chassis, vessels, or each other during stacking. Specified by dimensions, load ratings, and material grade, they must meet international standards for safety and interchangeability. Grades vary by load capacity and corrosion resistance, with higher grades for offshore or heavy-duty applications.

Working Principle

The fitting consists of a body with a rotating head that engages the container's corner casting. When turned 90 degrees, the head locks into the casting, securing the container. The locking mechanism is spring-loaded or manually operated, ensuring a positive engagement that withstands lifting and transport forces.

Common Materials

ASTM A148 Grade 80-50, ASTM A27 Grade 70-40, DIN 1.0558, GB/T 11352 ZG270-500

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load	25–40 t	Static load capacity per fittingISO 1161
Safe Working Load (SWL)	20–30 t	Dynamic load capacity under normal operationISO 3874
Breaking Load	≥150 t	Minimum ultimate tensile loadISO 1161
Material Yield Strength	≥250 MPa	Minimum yield strength of cast steelASTM A148
Hardness	150–220 HB	Brinell hardness range for wear resistance
Surface Treatment	Hot-dip galvanized or epoxy coated	Corrosion protection for marine environmentISO 1461
Coating Thickness	70–100 μm	Zinc coating thickness for galvanized fittingsISO 1461
Operating Temperature	-40 to +80 °C	Temperature range for safe operation
Dimensional Tolerance	±1.0 mm	Tolerance on critical dimensionsISO 1161
Weight	3.5–5.5 kg	Typical weight per fitting
Fatigue Life	≥2,000,000 cycles	Minimum cycles under cyclic loading
Corrosion Resistance	≥500 h in salt spray h	Minimum salt spray test durationISO 9227

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

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Container Fitting.

Published Manufacturer Relationships

Source-reviewed profile relationships currently associated with Container Fitting

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Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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