Wacker Neuson 5100075632 1/2-13x1-1/4 Hex Flange Screw Grade 5

The Wacker Neuson 1/2-13x1-1/4 Hex Flange Screw Grade 5 is a genuine OEM fastener designed for PDT3A, PDI3A, PDT2A, and PDI2A series diaphragm pumps. Sourced directly from Wacker Neuson, this is the same Grade 5 hex flange screw specified at the factory — not a generic substitute. Verified fitment spans the full range of PDT and PDI pump variants, so you can order with confidence that is the correct part for your machine.

Key Features

• Grade 5 Strength Rating — Medium-carbon steel construction meets the tensile and shear load requirements for structural fastener applications on Wacker Neuson pump assemblies.
• Integrated Flange Bearing Surface — The built-in flange distributes clamping load evenly without a separate washer, simplifying installation and ensuring consistent torque retention.
• Genuine OEM Part — Manufactured to Wacker Neuson's exact thread pitch, head geometry, and material specification for part number 5100075632.
• Broad Pump Series Coverage — Fits PDT3A, PDI3A, PDI3A(I), PDT2A, and PDI2A(I) diaphragm pump models from a single part number.
• Prevents Fastener Failure Under Vibration — A correctly torqued, properly spec'd hex flange screw maintains joint integrity in high-vibration pump environments; an undersized or mismatched fastener risks loosening and housing damage.

A hex flange screw combines a standard hex-head bolt with an integral load-spreading flange at the base of the head, acting like a built-in washer. In pump assemblies, these fasteners are used to secure housings, covers, and structural components that experience sustained vibration during operation. Using a fastener of the correct grade, thread size, and head style ensures the clamping force is distributed properly across the mating surface — a mismatched fastener can back out under load, allow housing flex, or cause thread damage that leads to more extensive repairs.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.