ARO 96229 Stainless Steel Flange Nut for AODD Diaphragm Pumps

ARO 96229 Stainless Steel Flange Nut

The ARO 96229 Flange Nut is a stainless steel fastening component used in compatible ARO Expert Series air-operated double-diaphragm pump assemblies. ARO specifies the nut as M8 x 1.25 - 6h, providing a precise thread reference for maintenance teams sourcing replacement hardware.

Use the manufacturer part number together with the complete pump model when ordering. Avoid selecting a replacement solely by approximate nut size, because thread pitch, fit and material are important for correct pump assembly.

Stainless Steel Construction for Pump Assembly Service

ARO identifies the material code for 96229 as stainless steel. In the applicable parts diagrams, this flange nut works with corresponding M8 fasteners used to secure the pump’s fluid-section assembly.

The flange design provides an integrated bearing surface under the nut, helping distribute clamping force across the joint when installed according to the manufacturer’s assembly procedure.

Documented Expert Series Applications

ARO lists 96229 as item 29 in multiple Expert Series pump manuals. It appears in the PX10 family, including 1-inch Expert Series configurations, and in the PX15 family for 1-1/2-inch models.

A documented PX10 assembly uses 20 of these flange nuts, and the same quantity is shown in PX15 documentation. This number describes the quantity required in the complete pump assembly and should not be interpreted as the quantity included in a retail package.

Compatible with Multiple Pump Configurations

The 96229 flange nut is documented across polypropylene and PVDF Expert Series pump configurations. For example, compatible 1-inch and 1-1/2-inch pumps may use different manifolds, fluid caps, diaphragms and check components while retaining 96229 as common fastening hardware.

This makes the exact pump model important when preparing a complete repair order. Although the flange nut may be common across several configurations, other surrounding components can differ substantially.

Check the Related Fasteners

ARO documentation pairs 96229 with M8 x 1.25 screws in the applicable pump assemblies. For PX10 models, the documented fluid-section hardware includes 96163 M8 x 1.25 x 50 mm screws along with 96229 flange nuts.

Before ordering, inspect the corresponding screws, washers and threaded joints. If corrosion, thread damage or deformation is present, identify those components separately rather than assuming the flange nut alone will complete the repair.

Ordering Guidance

When purchasing ARO 96229, confirm:

• Complete ARO pump model
• M8 x 1.25 - 6h thread requirement
• Stainless steel material requirement
• Number of nuts actually needed for the repair
• Condition of associated screws and washers