Description

Overview

The BPW TSB4309 Caliper Mounting Bolt (Short) secures the floating guide pin within the BPW TSB4309 disc brake caliper assembly. Featuring an M16 x 1.5 thread, 73mm length and 10.9 strength grade, this short mounting bolt supports the sliding caliper mechanism used on heavy trailer axles.

It fits the loose or floating guide-pin position, rather than the longer main guide pin. Correct bolt selection is important when replacing caliper hardware during brake servicing.

Features

• Short 73mm bolt for the floating guide-pin position.
• M16 x 1.5 metric fine thread.
• High-tensile 10.9 strength grade.
• Suitable for the BPW TSB4309 caliper guide-pin arrangement.

Specifications and Materials

• Component: Caliper guide-pin mounting bolt
• Brake system: BPW TSB4309
• Mounting position: Short / loose guide pin
• Thread: M16 x 1.5
• Nominal bolt length: 73mm
• Strength grade: 10.9
• BPW assembly position: 345

Part number: CH0719G.

For detailed caliper component identification, refer to the BPW ECO Disc original spare parts guide

Compatibility and Fitment

Match the bolt to the short floating guide-pin position on the BPW TSB4309 disc brake caliper. The TSB series uses different bolt lengths for its fixed and floating guide pins, so the two positions must not be confused.

The short bolt has a nominal length of 73mm, compared with 103mm for the longer main guide-pin screw. Check the brake model, existing bolt length, thread and mounting position before ordering.

BPW TSB3709 calipers also use the same short guide-pin screw specification. Confirm the exact brake assembly before fitting.

Related Parts

Check the following caliper service components against the BPW TSB brake assembly before ordering.

Compliance and Safety

BPW specifies that TSB guide-pin screws are single-use fasteners and must be replaced after removal. Reusing a removed bolt can compromise the security of the caliper guide-pin assembly.

Follow the applicable BPW workshop instructions for installation and tightening torque. Inspect the guide pins, bushes and sealing components for wear or contamination before reassembly. Confirm the caliper slides correctly and that the complete braking system operates normally before returning the trailer to service.

Trailer Applications

This short caliper bolt is used during servicing and repair of BPW TSB4309 disc brakes fitted to heavy commercial trailers, including semi-trailers, B-double combinations and freight transport equipment using compatible BPW axle assemblies.

It is particularly relevant when replacing guide pins, servicing caliper bushes or rebuilding a sliding caliper assembly.

Why Choose ICS Trailers

BPW TSB brake calipers use different fasteners for their fixed and floating guide-pin positions. Selecting the incorrect length can prevent proper assembly and compromise caliper operation.

ICS Trailers can help identify the correct short mounting bolt alongside the longer guide-pin bolt, bush kits and sealing components required for your repair.

• Compare the 73mm bolt length and M16 x 1.5 thread against the removed fastener.
• Send through your brake type, existing bolt markings or caliper photos if you need assistance identifying the correct replacement.

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