20/09/2026

HelaGuard® Accessories, Sealing Washer, M40-1.25", Polyester Elastomer, Blue, 10/pkg


Part No. 166-90450

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  • Polyester elastomer washer provides ingress protection against moisture and is oil resistant.
  • Small "pips" in bore retain washer onto metric threaded fittings.
  • Ribs on both sides of washer enhances sealing performance.


Brand Family HelaGuard®
Color Blue (BU)
Description Face sealing washer affixed between metric threaded fitting and entry wall surface to achieve IP66, IP67, IP68 and IP69 levels of ingress protection. Hardness 33 Shore D. Self-extinguishing and halogen free.
Global Part Number RSW125-TPE-BU
Part Number 166-90450
Product Family Flexible Conduit Accessories
Product Subfamily Conduit Sealing Washers
Short Description HelaGuard® Accessories, Sealing Washer, M40-1.25", Polyester Elastomer, Blue, 10/pkg
Technical Description Manufacturer Reference Number: RSW40-BU
Type RSW125
Inner Diameter (imperial) 1.57"
Inner Diameter (metric) 40.0mm
Nominal Diameter (imperial) 1.25"
Nominal Diameter (metric) 40.0mm
Outside Diameter (imperial) 1.97"
Outside Diameter (metric) 50.0mm
Thickness (imperial) 0.07"
Thickness (metric) 1.8mm
Trade Size 1-1/4 "
CE Certification No
CSA Certified No
Material TPE
Material Thermoplastic Elastomer (TPE)
Operating Temperature -58°F to +275°F (-50°C to +135°C)
Prop65 Warning No
REACH Conformity No
ROHS Compliant No
UV Resistant No
Carton Qty. 1
Customs Number 3926904500
GTIN-13 / EAN 4031026521244
Harmonized Tariff Schedule Code 3926.90.4590
Packaging Type pack
Pkg. Qty. 10Pieces
Pkg. Qty. 10
UPC 089306400233
Product Keyword helaguard, conduit, conduits, corrugated conduit, corrugated conduits, fitting, fittings, protection hose, protection hoses, conduits and fittings, protective hose, protective hoses, protection tube, flexible tube, corrugated tubing, corrugated tube, corr
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