• Special Screws
  • Vacuum Application Screws


Cover Caps - PTFE

  • Vacuum
  • Cleanroom Specification
  • Chemical-proof

Dimension Drawing

SCAP-PTCover Caps - PTFE 寸法図

Unit : mm

Part Number M (Fine)
Nominal of Thread
Pitch H D1 h B tB Recommended Torque
with SNCPS Socket Head Cap Screws Mass
SCAP-3-PT M5 0.5 6 9 2 7 3 0.04 SNCPS-M3 0.65 17.78 CAD Cart

● Batch cleanroom packing is provided for orders containing multiple items of the same size.

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Cover Caps
Main Body PTFE(Polytetrafluoroethylene)


FPD production equipment, semiconductor fabrication wet processes,
printed circuit board etching devices, metallic surface treatment equipment and facilities, cleaning equipment, and chemical plants


  • Combine SCAP-PT Cover Caps and SNCPS Socket Head Cap Screws for Cover Caps.
  • The PTFE (Polytetrafluoroethylene) cover protects the screw head from corrosion caused by chemicals.
  • PTFE is a plastic with excellent chemical resistance, and most chemicals cannot penetrate it.
  • Chemical Resistance of PTFE⇒Chemical Resistance of Chemical Resistance Screws
  • Since the screw portion is stainless steel, they can be used with higher tightening forces than PTFE screws.
  • Tightening with the recommendation torque has a sealing effect and the bearing surface of the cover cap fits the attachment surface tightly. Airtight testing at 0.6 MPa confirmed that there is no leakage.
  • Also, make cover caps from requested materials such as Hastelloy*1 and PEEK are available.

*1: Hastelloy is a registered trademark of Haynes International, Inc.

Precautions for Use

Chemical resistance changes with performance conditions. Always carry out tests under performance conditions similar to actual conditions in advance.


After tightening SNCPS Socket Head Cap Screw for Cover Cap, attach SCAP-PT Cover Cap so that it covers the head of SNCPS.
Ensure that the tightening torque of SCAP-PT does not exceed the recommended torque in the chart.

SCAP-PTCover Caps - PTFE

Related Products

SCAP-AL aluminum alloy for use in vacuum chambers are available.

SCAP-PT/SNCPSCover Caps - PTFE / Socket Head Cap Screws for Cover Caps

SCAP-CE ceramic cover cap for use in vacuum chambers are available.

SCAP-PT/SNCPSCover Caps - PTFE / Socket Head Cap Screws for Cover Caps

Product List

Click here to see SCAP-PT

Click here to see Vacuum Application Screws