Pulsafeeder 42022 Stainless Steel Flat Washer - 0.28 x 0.63 x 0.05 Inch
Pulsafeeder 42022 stainless steel flat washer for compatible Chem-Tech pump assemblies. 0.28-inch ID, 0.63-inch OD and 0.05-inch thickness.
The Pulsafeeder 42022 is a stainless steel flat washer used in compatible Chem-Tech chemical metering pump assemblies. The manufacturer part is identified in replacement parts listings as WASHER(SST), .28X.63X.05 FLAT.
This replacement washer has catalog-listed dimensions of 0.28 inches inner diameter, 0.63 inches outer diameter, and 0.05 inches thickness. It is a mechanical fastening component used in applicable pump hardware assemblies.
Product Specifications
- Manufacturer: Pulsafeeder
- Part Number: 42022
- Product Name: Stainless Steel Flat Washer
- Product Type: Flat Washer
- Catalog Description: WASHER(SST), .28X.63X.05 FLAT
- Material: Stainless Steel (SST)
- Inner Diameter: 0.28 Inches
- Outer Diameter: 0.63 Inches
- Thickness: 0.05 Inches
- Approximate Inner Diameter: 7.11 mm
- Approximate Outer Diameter: 16.00 mm
- Approximate Thickness: 1.27 mm
- Washer Style: Flat
- Product Family: Chem-Tech Replacement Parts
- Stainless Steel Grade: Not Independently Verified
- Exact Pump Model Compatibility: Verify Manufacturer Parts Diagram
Stainless Steel Flat Washer
The Pulsafeeder 42022 is manufactured with a stainless steel material designation, abbreviated as SST in the replacement parts catalog.
Flat washers are used in mechanical assemblies to provide a bearing surface beneath bolts, screws or nuts and help distribute fastening loads across the contacted surface.
Proper washer selection supports correct assembly of compatible pump components.
0.28-Inch Inner Diameter
The washer has a listed inner diameter of 0.28 inches, approximately 7.11 mm.
This opening dimension should be checked against the applicable bolt or fastener specification before installation.
The washer should not be selected based only on a nominal fastener size without confirming the manufacturer parts requirements.
0.63-Inch Outer Diameter
The catalog specifies an outer diameter of 0.63 inches, approximately 16.00 mm.
The outer diameter determines the washer contact area and must be suitable for the corresponding mounting surface.
0.05-Inch Thickness
The manufacturer description identifies a thickness of 0.05 inches, approximately 1.27 mm.
Thickness is important when replacing washers in assemblies where fastener engagement and component spacing must be maintained.
Chem-Tech Hardware Kit Applications
Pulsafeeder replacement parts documentation lists part 42022 as a component in several Chem-Tech maintenance kits.
- J61521: Acorn Nut Set - includes 10 washers, part 42022
- J61528: Head Bolt Kit - includes 2 washers, part 42022
- J61532: Housing Set Hardware Kit - includes 2 washers, part 42022
These kit references establish documented hardware assembly applications. Exact pump model compatibility must still be verified against the appropriate parts diagram.
Potential Applications
- Chem-Tech chemical metering pump maintenance
- Pump head fastening assemblies
- Housing hardware replacement
- Acorn nut and bolt assembly servicing
- Replacement of worn or missing washers
- Original equipment fastener maintenance
- Industrial pump refurbishment
Inspection and Maintenance
Inspect existing washers for corrosion, bending, deformation, cracking or excessive wear.
Check associated bolts, nuts and mounting surfaces for damage before installing replacement hardware.
Replace washers that no longer meet the original equipment requirements.
Installation Guidelines
Confirm that Pulsafeeder 42022 matches the specified washer for the pump assembly.
Disconnect electrical power, isolate the chemical feed system and release pressure before performing maintenance.
Install the washer with the appropriate fastener and tighten the assembly according to the manufacturer service instructions.
Do not assume the washer provides fluid sealing unless the manufacturer explicitly specifies that function.
Ordering Information
Order using the exact manufacturer part number 42022.
Verify the stainless steel material, 0.28-inch inner diameter, 0.63-inch outer diameter, and 0.05-inch thickness before purchasing.
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