Product Name: Flat Washer, .38 (3/8″) – Part No. 10069714

Description:
This component is a standard flat washer with a nominal size of .38 inches (3/8 inch), specifically designed for use in the hydraulic power package assemblies of waterjet cutting systems. It is a thin, ring-shaped fastener component placed under a nut or bolt head to distribute load, reduce friction, prevent surface damage, and act as a spacer or shim in mechanical assemblies.

According to the official parts diagram for the Hydraulic Power Package (Assembly 72154447), this flat washer is listed as Item 8 with a quantity of 2 required per assembly . It is used in conjunction with other fastening components to secure critical hydraulic system elements, including the high-pressure pump, reservoir, and cooling system components that generate the ultra-high pressure water stream required for waterjet cutting operations.

Applications:

• Used under M8 (8mm) or 3/8 inch bolts, screws, or nuts in waterjet hydraulic power package assemblies

• Load distribution for fasteners securing hydraulic pumps, reservoirs, and cooling system components

• Provides a smooth bearing surface for hydraulic component mounting connections

• Used as a spacer or shim in mechanical assemblies where precise positioning is required

• Suitable for 60,000-94,000 PSI (approximately 4,137-6,480 bar) waterjet hydraulic systems

Features:

• 3/8 Inch (0.38) Nominal Size: Fits 3/8 inch (or M8 metric equivalent) bolts and studs

• Flat Parallel Faces: Precision-stamped or machined with flat, parallel surfaces to provide uniform load distribution

• Smooth Edges: Inner and outer diameter edges are smooth to prevent damage to mating components

• Load Distribution: Prevents embedding of the nut or bolt head into softer materials under high clamping loads

• Corrosion-Resistant Construction: Typically manufactured from steel with zinc plating or stainless steel for durability in waterjet environments

• Standard Dimensions: Conforms to industry standard washer specifications (e.g., USS or SAE)

• Direct OEM Replacement: Interchangeable with manufacturer specifications as listed in the official parts diagram

Maintenance:

When to Replace:

• Deformation: Inspect the flat washer for signs of bending, warping, or crushing during disassembly

• Indentation Marks: Check for indentation or embedding marks that indicate excessive load or soft mating material

• Cracking: Replace any washer that shows cracks or splitting

• Corrosion: Heavy rust or pitting that compromises material integrity

• During Major Service: It is standard practice to replace washers whenever the associated fastener is removed during major pump or power package service

• Loss of Clamping Force: If the bolted joint becomes loose during operation, inspect and replace the washer

Inspection and Installation Guidelines:

• Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, fully depressurize both the hydraulic system and the high-pressure water system, and follow lockout/tagout procedures

• Reuse Consideration: Flat washers can often be reused if undamaged, but replacement is recommended for critical high-stress applications

• Proper Placement: Place the flat washer between the bolt head/nut and the bearing surface (or between the bolt head and a lock washer) as specified in the equipment service manual

• Torque Compliance (Critical): Tighten the fastener assembly to the specific torque value listed in the equipment service manual using a calibrated torque wrench; the presence of the washer affects torque-tension relationships

• Size Verification: Ensure the washer inner diameter fits freely over the bolt threads without binding

• Surface Preparation: Clean mating surfaces and remove any debris, old sealant, or corrosion before installation

• Storage: Store spare flat washers in a clean, dry environment sorted by size to prevent mixing with other fasteners

• Cross-Reference Information: 10069714 is listed as Item 8 in Hydraulic Power Package Assembly 72154447 (Qty 2) 

Cross-Reference Information:

• OEM Part Number: 10069714

• Table Reference: Table 12-11, Hydraulic Power Package 72154447 (Item 8, Qty 2) 

• Nominal Size: .38 inch (3/8″)

• Compatible with: M8 or 3/8 inch fasteners

• Used in: Hydraulic power packages, pump assemblies, and cooling system components