• Special Screws
  • Vacuum Application Screws


Hex socket Head Cap Screws with Ventilation Hole / Surface Hardening Treatment

  • Vacuum
  • Cleanroom Specification
  • Seizing & Sticking Prevention
  • Heat-resistance

Dimension Drawing

SVSL-PNHex socket Head Cap Screws with Ventilation Hole / Surface Hardening Treatment寸法図



M (Coarse)
Nominal of Thread

Unit : mm

Part Number M (Coarse)
Nominal of Thread
Pitch L D1 L1 B d
Qty per pack Mass
CAD Standard
SVSL-M4-8-PN M4 0.7 8 7 4 3 1.5 1 1.5 11.82 CAD Cart
SVSL-M4-10-PN M4 0.7 10 7 4 3 1.5 1 1.6 11.97 CAD Cart
SVSL-M4-12-PN M4 0.7 12 7 4 3 1.5 1 1.8 12.29 CAD Cart
SVSL-M4-16-PN M4 0.7 16 7 4 3 1.5 1 2 12.92 CAD Cart
SVSL-M4-20-PN M4 0.7 20 7 4 3 1.5 1 2.3 13.24 CAD Cart

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Related Services


Main Body SUS316L
Surface hardening treatment
Strength Class A4-70


Seizing Prevention
Vacuum devices / Vacuum chambers / FPD production equipment /
Semiconductor devices / Electron microscopes / Food industry machines


  • The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and supports vacuum drawing of vacuum devices.
  • Hardening the screw surface prevents screw seizing / sticking.
  • Unlike platings or coatings, there is nothing adhering to the surface, eliminating concerns about contamination due to stripping during tightening.
  • Suitable for prevention of seizing in environments where lubrication cannot be used.
  • Cleanroom washed and packed. ⇒Cleanroom Wash / Cleanroom Packing Service

Usage Example

Gas trapped at the bottom of a screw hole is released through SVSL-PN, and gas trapped in a drilled hole is released through SWAS-VF

SVSL-PNHex socket Head Cap Screws with Ventilation Hole / Surface Hardening Treatment

Precautions for Use

May have lower corrosion resistance than general SUS316L.
We recommend performing a test under the same usage conditions as in actual usage in advance.

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