• Special Screws
  • Washers・Insert


Seal washer

Dimension Drawing

SWS-SSeal washer寸法図


Unit : mm

Part Number Nominal d D h t t1 C Qty per Pack Mass
CAD Standard
SWS-5-S 5 5.2 9.6 0.8 2.7 2.5 8.2 10 0.6 31.77 CAD Cart

●The minimum order quantity is 1 piece. Use the Sold Separately Service.


Main Body SUS304
Rubber Packing Silicone rubber


Seal ring
Oil hydraulic equipment / Pneumatic device


  • Seal washer incorporating rubber packing in a stainless steel washer.
  • Prevents air/liquid leakage from the seating surface of the screw head.
  • During screw tightening, the rubber bonds with the screw thread to make the seal rather than slipping out of place.
  • SWS-S uses silicone rubber for the rubber packing. Features outstanding heat and cold resistance and electrical insulation.
  • Allowable Operating Temperature
    120°C ---- SWS
    200°C ---- SWS-F
    120°C ---- SWS-E
    180°C ---- SWS-S

Usage Example

SWS-SSeal washer

Product List

Customer Service

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  • Technical Question
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NBK America LLC

9:00 to 17:00 on weekdays, Eastern Standard Time