M24*230 Excavator Bucket Pin Lock Bolt: Size, Compatibility, and Replacement Guide

I identify an M24*230 excavator bucket pin lock bolt by its nominal thread diameter of 24 mm and its stated overall length of 230 mm. This size may suit an excavator bucket locking or retention assembly, but these two dimensions alone do not prove compatibility. Before ordering, I confirm the thread pitch, threaded length, head or drive style, material and heat-treatment requirements, installation clearance, and the excavator’s parts reference. At Zhonghai Jiuchuan, I support buyers by reviewing drawings, photographs, samples, and application details before preparing a quotation.

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This guide explains how I evaluate the M24*230 specification, how I match it to an excavator, what information I need for a replacement, and how buyers can reduce the risk of receiving a bolt that cannot be installed or may not perform as required.

Who This Guide Is For

I prepared this guide for excavator owners, machinery repair workshops, construction-equipment distributors, parts importers, and OEM purchasing teams. It is especially useful when a bucket pin lock bolt is damaged, missing, corroded, or difficult to identify from an old machine. It can also help buyers who are comparing a drawing-based order with a general replacement part.

For routine maintenance, a clear photograph and the original part information may be enough to begin an inquiry. For fleet procurement or repeated orders, I recommend using a controlled drawing or approved sample so that future batches follow the same specification. This is more reliable than ordering only by the description “M24*230.”

What Does M24*230 Mean?

Basic Size Interpretation

In the designation, “M24” normally indicates a metric thread with a nominal outside diameter of approximately 24 mm. “230” commonly indicates a nominal bolt length of 230 mm, although the exact measuring reference can vary by drawing, manufacturer, and head configuration. I therefore treat the designation as a starting point rather than a complete manufacturing specification.

The thread pitch is a separate requirement. An M24 fastener can be produced with different metric pitches, and a bolt with the wrong pitch may not engage correctly even when its diameter appears suitable. I ask buyers to provide the original nut, mating component, thread gauge result, or equipment drawing whenever the pitch is not stated.

Typical Function in a Bucket Assembly

A bucket pin lock bolt is generally used as part of a retention arrangement that helps keep a bucket pin or related retaining component in position. Its exact role depends on the excavator design, bucket linkage, locking plate, washer arrangement, and service instructions. The bolt should not be selected as an isolated fastener if the complete locking system has additional parts.

I also distinguish between the bolt itself and the full replacement set. Some buyers require only the M24*230 bolt, while others need a matching nut, washer, locking plate, spacer, or complete pin-lock assembly. Confirming the supply scope prevents a correct bolt from becoming an incomplete repair.

Key Specifications to Confirm Before Ordering

I do not recommend selecting material solely because a supplier uses a familiar commercial grade. The correct requirement depends on the original design, load conditions, exposure to soil or water, tightening method, and the buyer’s technical standard. When no material specification is available, I ask for a sample or engineering approval instead of making an unsupported performance claim.

How I Check Excavator Compatibility

Step 1: Identify the Machine and Assembly

I begin with the excavator brand, model, serial-number range if available, and the location of the bolt. “Bucket pin lock bolt” can describe different arrangements across equipment families. A photograph showing the bolt installed, together with a close-up of the head and locking area, helps me understand the assembly.

Step 2: Compare the Original Part

I compare the replacement with the original bolt using diameter, overall length, threaded length, head geometry, nut type, washer position, and any shoulder or special feature. I also check whether the old 230 mm measurement was taken from beneath the head or from the end of a special shoulder. This measurement detail can change the replacement length required.

Step 3: Verify the Mating Components

I inspect the internal thread, nut, locking plate, and pin-retention surfaces rather than checking the bolt alone. Damaged threads, oval holes, worn washers, or distorted locking plates may cause a new bolt to fit poorly. If the mating part is worn, replacing only the bolt may not restore the intended retention arrangement.

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Step 4: Confirm the Installation Requirement

I confirm access for the installation tool, available clearance around the head and nut, and the tightening procedure specified by the equipment manufacturer. I do not invent a tightening torque when the equipment documentation or approved engineering specification is unavailable. The installer should follow the machine maker’s service instructions and use suitable tools.

Material, Finish, and Replacement Options

For this type of industrial fastener, buyers may request a particular steel grade, strength class, hardness range, surface finish, or corrosion-protection treatment. However, the correct option must be selected against the original drawing or application requirement. A thicker coating, for example, can affect thread fit and should not be added without checking the mating nut and clearance.

I can discuss several supply formats, including a single replacement bolt, a bolt-and-nut combination, or a complete lock-bolt service set. The best format depends on whether the buyer is performing an emergency repair, maintaining a parts inventory, or standardizing components across multiple machines. I recommend stating the required quantity and packaging method at the quotation stage.

Buyer Selection Framework

Information I Recommend Sending to a Supplier

• Excavator make, model, and serial-number information when available.
• Original part number, drawing, sample, or clear dimensional sketch.
• Photos of the bolt, head, nut, washer, and installed position.
• Confirmed M24 diameter and 230 mm nominal length, including the measurement method.
• Thread pitch, threaded length, material, finish, and strength requirements.
• Required quantity, packaging preference, destination port, and target delivery schedule.

I treat a buyer’s drawing or approved sample as the primary reference when it differs from a general catalog description. This approach helps prevent errors caused by similar-looking bolts with different thread pitches or head dimensions. It also gives both parties a clear basis for inspection and repeat purchasing.

Common Replacement Mistakes

The most common mistake I see is ordering by diameter and length while ignoring thread pitch and head geometry. Another is measuring the old bolt after it has stretched, corroded, or lost part of its original head, which can produce an inaccurate result. Buyers should also avoid assuming that a bolt listed for one excavator model fits every bucket configuration on that model.

A further mistake is replacing a retaining bolt without checking the nut and locking components. If the nut no longer holds correctly or the locking plate is worn, the repair may remain unreliable even when the new bolt is dimensionally correct. I recommend inspecting the complete joint before finalizing the order.

Pricing, MOQ, and Lead-Time Considerations

The price of an M24*230 excavator bucket pin lock bolt depends on the confirmed material, machining process, heat treatment, coating, inspection scope, order quantity, packaging, and shipping destination. I avoid presenting a fixed price before these variables are defined because a standard replacement and a drawing-controlled component may require different production steps.

Minimum order quantity and lead time also depend on whether the part is available as a regular item or must be produced to a customer drawing. For urgent maintenance, I first review available stock or the fastest feasible production route. For recurring procurement, I can discuss batch planning, packaging identification, and repeat-order control with the buyer.

How Zhonghai Jiuchuan Supports This Inquiry

At Zhonghai Jiuchuan, I handle M24*230 excavator bucket pin lock bolt inquiries with a specification-first process. I can review the equipment application, compare supplied drawings or samples, clarify the complete supply scope, and coordinate production requirements with the buyer. My objective is to reduce dimensional uncertainty before manufacturing or shipment.

I also support B2B buyers who need more than a one-time replacement. Depending on the confirmed requirement, I can discuss repeat supply, export packaging, batch identification, and documentation needed for receiving inspection. Any quality, material, or inspection requirement should be agreed in writing before order confirmation.

Final Recommendation and Next Steps

The M24*230 designation gives a useful starting point: a nominal 24 mm metric thread and a stated 230 mm length. It does not, by itself, confirm compatibility with a particular excavator bucket assembly. I recommend verifying thread pitch, threaded length, head geometry, material, mating components, and the original equipment reference before purchasing.

To request a quotation from Zhonghai Jiuchuan, send the machine model, original part information, photographs or drawing, required quantity, and any material or finish standard. I will use those details to clarify the specification and determine whether you need the bolt alone or a complete locking solution. This simple verification step can help you avoid incorrect replacement parts, installation delays, and unnecessary repeat orders.

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