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ASAB DDP42 Replacement Parts #8 - M8x25 Hex Screw
Australian Spray & Blast

ASAB DDP42 Replacement Parts #8 - M8x25 Hex Screw

Sale price$1.32

Part Code: ASAB-SDDP42-8

Introducing the DDP42 M8×25 Hex Screw — a high-strength fastener used across ASAB DDP42 double diaphragm pump assemblies to clamp housings, plates, and valve components securely under vibration and repeated cycling. The hex head design makes it quick to service with standard spanners/sockets, which is handy when you’re doing rebuilds in the workshop or field repairs on site.

Fasteners on diaphragm pumps cop a hiding: repeated strip-downs, corrosion, product contamination, and over-torquing can leave screws rounded, stretched, seized, or thread-damaged, which leads to uneven clamping, sealing issues, and repeat leaks. Replacing worn hardware with the correct M8×25 hex screw helps restore proper clamp load and keeps the pump assembled tight and reliable.

Whether you’re doing a wet-end rebuild, refreshing hardware as preventative maintenance, or replacing a bolt that’s been flogged out, the ASAB-SDDP42-8 is the right fastener to keep your DDP42 clamped up properly.

Key Benefits

  • Correct replacement fastener for ASAB DDP42 assemblies

  • M8 × 25mm sizing for proper fit and clamp load

  • Hex head for fast service access with common tools

  • Helps maintain even clamping pressure for better sealing and alignment

  • Ideal replacement for screws that are rounded, stretched, corroded, or seized

  • Supports reliability under vibration and repeated pump cycling

  • Workshop-ready spare for fast rebuilds and repairs

What’s Included

  • DDP42 M8×25 Hex Screw — ASAB-SDDP42-8

Safety Check

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

  • Use the correct tool size: A sloppy socket/spanner rounds heads fast—clean the head and use the right size.

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

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

  • Replace as a set where possible: Mixing old stretched screws 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.
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