Marine Steel Plate Eye Plate for Rope Terminal & Shackle Connections | JIS F 3410-1999 Type C

Product Overview

The JIS F 3410 Type C steel plate eye plate is a welded shipboard connection fitting used for fixing rope terminals, shackles, pulleys, and similar attachment points to ship structures. It provides a compact eye connection where the external load must be transferred through the eye plate, weld legs, and supporting deck or structural member.

This Type C page covers nominal sizes 0.5 to 10 with permissible loads from 4.9 to 98 kN. Unlike a bollard or chock, this product is not a free-standing mooring post or rope guide; it is a welded eye connection point. Selection should be checked together with load direction, shackle fit, weld leg, base structure reinforcement, material grade, surface treatment, inspection requirement, and class approval scope when applicable.

Quick Specifications

• Product type: JIS F 3410 Type C steel plate eye plate → welded eye connection for rope terminal, shackle, or pulley fixing on ship structures.
• Nominal size range: 0.5 to 10 → JIS size designation for this Type C series; it should not be treated as plate thickness or a millimetre value.
• Permissible load: 4.9 to 98 kN → selection reference for the eye plate; do not mix it with rope MBL, bollard SWL, proof load, or test load.
• Main dimensions: b / B / D / H / T → core geometry for webpage drawing, shackle clearance review, welding layout, and quotation confirmation.
• Welding leg: f1 and f2 according to size → important for shipyard fit-up, weld preparation, and load transfer into the supporting structure.
• Calculated weight: 0.19 to 8.32 kg → useful for packing, installation handling, replacement planning, and freight estimation.
• Material reference: mild steel / SS400 or equivalent, with SM400A / SM400B / SM400C and stainless steel options to be confirmed according to project requirement.
• Surface treatment: Sa 2.5 blasting + one layer epoxy shop primer → final paint system follows vessel specification or yard requirement.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm JIS F 3410 Type C and nominal size 0.5 / 1 / 2 / 3 / 5 / 7.5 / 10 according to permissible load and vessel drawing.

Step 2: Confirm the actual use: rope terminal fixing, shackle connection, pulley fixing, mooring accessory connection, or other shipboard attachment point.

Step 3: Confirm load direction, connection hardware, minimum shackle requirement if applicable, and whether the application is non-lifting, cargo-related, or subject to special approval.

Step 4: Confirm installation structure: deck, bulkhead, bracket, foundation plate, available welding length, weld leg, local reinforcement, and shipyard weld inspection requirement.

Step 5: Confirm material and finish: SS400 / mild steel / SM400 equivalent / stainless steel option, Sa 2.5 blasting, shop primer, final paint system, or special corrosion protection.

Step 6: Confirm inspection and certificate scope before quotation: material certificate, maker certificate, class certificate, witness inspection, magnetic particle / dye penetrant test, FEA report, or pull test if required.

Step 7: Provide quantity, delivery destination, required delivery time, installation drawing, load sketch, and product photos if this is a replacement project.

Structure

Steel plate eye body | Central eye opening | Smooth contact surface | Welded edge / base area | Welding legs f1 / f2 | Marking area | Blasted and shop-primed surface

Welding, Load Direction & Engineering Advantages

• Type C provides a compact welded eye connection for ship structures where a shackle, rope terminal, or pulley needs a defined attachment point rather than a bollard-style mooring post.
• The permissible load range from 4.9 to 98 kN gives a clear initial selection basis, but final acceptance depends on load direction, connection hardware, weld quality, and supporting structure strength.
• Welding leg values are included in the JIS Type C table, helping shipyards check fit-up, weld preparation, and installation feasibility during newbuilding or repair work.
• The eye-contact area should be finished smooth and free from visible cracks and flaking, reducing sharp local contact with shackles or rope terminal hardware.
• Material traceability can be arranged according to the order scope. SS400 / mild steel is a common standard reference for Type C, while SM400A / SM400B / SM400C or stainless steel should be confirmed before production.
• Magnetic particle inspection or dye penetrant inspection can be arranged when specified, especially around the eye contour, cut edge, machined / formed transition, and welding-adjacent area.
• FEA-based strength review can be used when required to check stress concentration around the eye opening, weld toe, and supporting structure interface.
• A project-specific pull test or proof-load verification can be arranged when the required test load, loading direction, fixture arrangement, and witnessing scope are clearly defined by the buyer or class requirement.

Custom Attributes

• Standard: JIS F 3410-1999 → use when the vessel drawing or purchase specification calls for JIS ship eye plate dimensions.
• Type: Type C → compact steel plate eye plate configuration for welded shipboard attachment points.
• Nominal Size: 0.5 / 1 / 2 / 3 / 5 / 7.5 / 10 → select according to permissible load, shackle arrangement, and installation drawing.
• Permissible Load: 4.9 to 98 kN → selection reference for the eye plate, not rope break load, bollard SWL, or a default proof test load.
• Material: SS400 / mild steel / SM400 equivalent / stainless steel option → final grade, certificate, and weldability requirement should be confirmed before quotation.
• Installation: Welded to ship structure → deck plate, bracket, bulkhead, weld leg, and local reinforcement should be checked by the shipyard or design office.
• Surface Treatment: Sa 2.5 blasting + one layer epoxy shop primer → final paint system should follow vessel coating specification.
• Inspection: Visual inspection, dimensional check, and optional MT / PT / FEA / pull test → inspection scope should be stated in the purchase order.
• Certificate Requirement: Available according to project requirement → maker certificate, material certificate, class certificate, and witness inspection are subject to order scope and approval process.

How It Works

Rope terminal or shackle is connected to the eye opening → Load is introduced into the Type C eye plate → Force transfers through the steel plate body and welding legs → Supporting ship structure and reinforcement carry the load → Inspection and final coating are completed according to project requirement

Applications

Ship mooring accessory connection | Rope terminal fixing | Shackle attachment points | Pulley fixing points | Deck fittings | Bulkhead or bracket-mounted connection points | Newbuilding projects | Ship repair and replacement work

Certifications & Advantages

Certificates can be arranged according to project requirement, inspection scope, material traceability, and class society approval procedure.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

Drawing & Photos

FAQ

Q1: How should the correct JIS F 3410 Type C eye plate size be selected?

A1: Select the nominal size according to permissible load, connection hardware, shackle clearance, load direction, welding leg, and the strength of the supporting ship structure. The table is a webpage selection reference and should be checked against the vessel drawing before production.

Q2: Can this Type C eye plate be used as a lifting pad eye?

A2: It should not be treated as a lifting point unless the project drawing, load direction, weld detail, supporting structure, test requirement, and class approval scope confirm that use. The page describes a JIS Type C ship eye plate for rope terminal, shackle, and pulley fixing; lifting or cargo-handling use must be separately verified.

Q3: What inspection points are important before delivery or installation?

A3: Important checks include material certificate, dimensional conformity, smooth eye-contact surface, absence of visible cracks and flaking, weld edge preparation, surface treatment, and any specified MT / PT, FEA review, class witness inspection, or pull test requirement.