ASAB DDP42 Replacement Parts #26 - Connecting Screw

Part Code: ASAB-SDDP42-26

Introducing the ASAB DDP42 Connecting Screw — a purpose-fit fastener used in ASAB DDP42 double diaphragm pump assemblies to securely connect and retain key internal components, keeping the pump aligned and clamped correctly under vibration and constant cycling. It’s a small part that plays a big role in maintaining sealing integrity and reliable operation—especially on higher-output pumps that cop plenty of movement and load.

Over time (or after a few strip-downs), connecting screws can end up stretched, corroded, seized, thread-damaged, or rounded, which leads to uneven clamping, loosened assemblies, and repeat leaks or misalignment. Replacing the screw with the correct DDP42 part is the clean fix when you’re rebuilding, refreshing hardware, or undoing the sins of the last bloke who leaned on it like it owed him money.

Whether you’re doing a wet-end rebuild, servicing the diaphragm stack, or replacing damaged hardware during preventative maintenance, the ASAB-SDDP42-26 is the right fastener to keep your DDP42 assembled properly and running smooth.

Key Benefits

• Direct replacement connecting screw for ASAB DDP42 assemblies

• Helps maintain correct component retention and alignment under cycling load

• Supports consistent clamping/sealing integrity to reduce weeping and loosening

• Ideal replacement for screws that are stretched, corroded, seized, or thread-damaged

• Smart to replace during major services / rebuilds for reliable torque retention

• Helps avoid repeat downtime caused by loose or unevenly clamped assemblies

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP42 Connecting Screw — ASAB-SDDP42-26

Safety Check

• Isolate and depressurise first: Shut off air supply, bleed the airline fully, and confirm the pump is not pressurised before disassembly.

• Use correct tools: Clean the fastener drive/head before removal to prevent rounding and tool slip.

• Don’t over-torque: Over-tightening can strip threads or distort housings—tighten evenly in a cross pattern where applicable.

• Check thread condition: If the housing threads are damaged, replacing the screw alone won’t hold—inspect and repair threads as required.

• Replace as a set where practical: Mixing old stretched fasteners with new can cause uneven clamp loads.

• Test after assembly: Bring air pressure up slowly and check for leaks or abnormal cycling before returning to service.

ASAB – Engineered for Performance, Built to Last.