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Vented Screws / Vacuum Screws characteristics/function :Heat Resistance

These screws are suitable for use in vacuum chambers.

They efficiently discharge gas accumulated in screw holes or drilled holes, achieving stability in vacuum levels and high vacuum.
The gas vent holes in NBK's vacuum equipment screws are processed in a way that minimally affects the metal structure, reducing the risk
of brittle fracture during use and the generation of outgassing in vacuum environments.
          Vacuum_1en

Selection Conditions
  • Select characteristics/functionHeat Resistance
Image Hex Socket Head Cap Screws with Ventilation Hole - High Intensity Stainless Steel Vented High Strength Stainless Steel Socket Head Cap Screws – Specialized Chemical Polishing Vented High Strength Stainless Steel Socket Head Cap Screws – Surface Hardening Hex Socket Head Cap Screws with Ventilation Hole - High Intensity S.S. Hex Socket Head Cap Screws with Captive Washers and Ventilation Hole - High Strength Stainless Steel Vented Socket Head Cap Screws with Small Head - 316L Stainless Steel Vented Socket Head Cap Screws with Ultra Low Profile & Small Head - 316L Stainless Steel Socket Head Cap Screws with Ventilation Hole - SUS316L Hex socket Head Cap Screws with Ventilation Hole / Surface Hardening Treatment
Part Name Hex Socket Head Cap Screws with Ventilation Hole - High Intensity Stainless Steel Vented High Strength Stainless Steel Socket Head Cap Screws – Specialized Chemical Polishing Vented High Strength Stainless Steel Socket Head Cap Screws – Surface Hardening Hex Socket Head Cap Screws with Ventilation Hole - High Intensity S.S. Hex Socket Head Cap Screws with Captive Washers and Ventilation Hole - High Strength Stainless Steel Vented Socket Head Cap Screws with Small Head - 316L Stainless Steel Vented Socket Head Cap Screws with Ultra Low Profile & Small Head - 316L Stainless Steel Socket Head Cap Screws with Ventilation Hole - SUS316L Hex socket Head Cap Screws with Ventilation Hole / Surface Hardening Treatment
Part Number SVSLG SVSLG-PC SVSLG-PN SVSX-88 SVSQLG SVSL-SD SVSHL-SD SVSL SVSL-PN
Feature High Strength(Equivalent to Strength Class 10.8) High Strength (Strength Class 10.8 Equivalent) High Strength (Strength Class 10.8 Equivalent) High Strength(Strength Class 8.8) High Strength (Strength Class 10.8 Equivalent)
Captive Washers
I=3		 Small Head
Corrosion Resistance
Non-magnetic		 Special Low Profile
Small Head
Space-saving
Non-magnetic		 CorrosionResistance Seizing prevention
Material SUS316L SUS316L SUS316L SUS316L HiMo SUS316L SUS316L SUS316L SUS316L SUS316L
Surface Treatment - Special Chemical Polishing Surface hardening treatment - - - - - Surface hardening treatment
Thread Size M3 ～ M6 M3 ～ M6 M3 ～ M6 M3 ～ M6 M3 ～ M6 M2 ～ M8 M3 ～ M5 M3 ～ M12 M3 ～ M8
Operating Temperature (℃) - - - - - - - - -
CAD CAD CAD CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SVSLG-M3 SVSLG-M4 SVSLG-M5 SVSLG-M6 SVSLG-M3-PC SVSLG-M4-PC SVSLG-M5-PC SVSLG-M6-PC SVSLG-M3-PN SVSLG-M4-PN SVSLG-M5-PN SVSLG-M6-PN SVSX-M3-88 SVSX-M4-88 SVSX-M5-88 SVSX-M6-88 SVSQLG-M3 SVSQLG-M4 SVSQLG-M5 SVSQLG-M6 SVSL-M2-SD SVSL-M3-SD SVSL-M4-SD SVSL-M5-SD SVSL-M6-SD SVSL-M8-SD SVSHL-M3-SD SVSHL-M4-SD SVSHL-M5-SD SVSL-M10 SVSL-M12 SVSL-M3 SVSL-M4 SVSL-M5 SVSL-M6 SVSL-M8 SVSL-M3-PN SVSL-M4-PN SVSL-M5-PN SVSL-M6-PN SVSL-M8-PN
Image Hex Socket Head Cap Screws (Inconel equiv.) with Ventilation Hole Molybdenum Hex Socket Head Cap Screws with Ventilation Hole Cover Caps Socket Head Cap Screws - 316L Stainless Steel - Specialized Chemical Polishing High Strength Stainless Steel Socket Head Cap Screws - Specialized Chemical Polishing High Strength Stainless Steel Socket Head Cap Screws - Cleanroom Washed & Packaged
Part Name Hex Socket Head Cap Screws (Inconel equiv.) with Ventilation Hole Molybdenum Hex Socket Head Cap Screws with Ventilation Hole Cover Caps Socket Head Cap Screws - 316L Stainless Steel - Specialized Chemical Polishing High Strength Stainless Steel Socket Head Cap Screws - Specialized Chemical Polishing High Strength Stainless Steel Socket Head Cap Screws - Cleanroom Washed & Packaged
Part Number SVSI SVSM SCAP-CE SNSL-PC SNSLG-PC SNSLG-UCL
Feature Chemical Resistance
Heat Resistance		 Heat Resistance Heat Resistance
Chemical Resistance

Electrical Insulation		 Heat Resistance
Corrosion Resistance
Non-magnetic
Low Outgas		 High Strength (Strength Class 10.8 Equivalent)
Low Outgas
Non-magnetic 		High Strength
(Strength Class 10.8 Equiv.)
Heat Resistance
Corrosion Resistance
Non-magnetic
Cleanroom Washed
& Packaged
Material Inconel equiv. Pure molybdenum Al2O3 (Alumina 99.5%) SUS316L SUS316L SUS316L
Surface Treatment - - - Special Chemical Polishing Special Chemical Polishing -
Thread Size M3 ～ M8 M3 ～ M8 M5 ～ M16 M3 ～ M8 M3 ～ M6 M3 ～ M6
Operating Temperature (℃) - - - - - -
CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SVSI-M3 SVSI-M4 SVSI-M5 SVSI-M6 SVSI-M8 SVSM-M3 SVSM-M4 SVSM-M5 SVSM-M6 SVSM-M8 SCAP-10-CE SCAP-3-CE SCAP-4-CE SCAP-5-CE SCAP-6-CE SCAP-8-CE SNSL-M3-PC SNSL-M4-PC SNSL-M5-PC SNSL-M6-PC SNSL-M8-PC SNSLG-M3-PC SNSLG-M4-PC SNSLG-M5-PC SNSLG-M6-PC SNSLG-M3-UCL SNSLG-M4-UCL SNSLG-M5-UCL SNSLG-M6-UCL

Latest

No. 2: Vacuum environments

No. 2: Vacuum environments

Vacuum technology is often used in semiconductor manufacturing equipment. A vacuum is not required for all equipment. A vacuum would mainly be required for equipment that uses plasma or an electron beam. In Part 2, we introduce some NBK products that are ideal for use in these vacuum environments!

Description of Tamper Resistant Screws for the Engineers

Description of Tamper Resistant Screws for the Engineers

This is the page on tamper-resistant screws in "Description of Special Screws for Designers." We introduce here what tamper-resistant screws are, the advantages of their use, various usage examples, and their types and characteristics.

Galling and Seizing

Galling and Seizing

This is a phenomenon that occurs while tightening, where the surface of the screw thread melts or welds due to frictional heat and the screw stops moving. To resolve galling, NBK's special surface treatment screws, such as those with fluorine coating, are recommended.

Micro Screws: M0.6 (S0.6) to M2.6 Lineup

Micro Screws: M0.6 (S0.6) to M2.6 Lineup

NBK offers a wide-ranging lineup of small-diameter screws in various shapes and materials.
Various head diameters and heights are available for the same screw diameters, contributing to saving space.

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Select characteristics/function

Vacuum LowOutgas Cleanroom Specification Space Chemical-proof High strength High Specific Strength Seizing & Sticking Prevention Antireflection Electrical Insulation Electric conducting Nonmagnetic Light Weight Easy to Use Loss Prevention Decoration Fixing/Positioning

Select Thread Size (Metric thread)

M2 M2.5 M2.6 M3 M4 M5 M6 M8 M10 M12 M16

Select Thread Size (Inch thread)

No.4-40UNC No.5-40UNC No.6-32UNC No.8-32UNC No.10-32UNF No.10-24UNC 1/4-20UNC

Select screw length（mm）

3 4 5 6 8 8.6 10 10.8 11.2 12 12.6 13.2 14 15 16 16.8 17.7 18 20 20.6 20.8 21.2 21.7 22 25 25.8 26.2 26.7 30 31.2 35 36.7 40 45 50 60 70 80 90 100 120 150

Select screw length（inch）

1" 1/2" 1/4" 1-1/2" 1-1/4" 1-3/4" 2" 3/16" 3/4" 3/8" 5/16" 5/8" 7/8"

Select material

Stainless Steel SUS304 Equivalent to SUS304 SUSXM7 (Equivalent to SUS304) SUS316L HiMo SUS316L Aluminum A5056 Titanium Grade 2 Titanium Nickel Alloy Inconel equiv. Hastelloy equiv. Molybdenum Pure Molybdenum Ceramic Al2O3 (Alumina 99.5%) Plastic PTFE (Polytetrafluoroethylene)

Stainless Steel

SUS304 Equivalent to SUS304 SUSXM7 (Equivalent to SUS304) SUS316L HiMo SUS316L

Aluminum

A5056

Titanium

Grade 2 Titanium

Nickel Alloy

Inconel equiv. Hastelloy equiv.

Molybdenum

Pure Molybdenum

Ceramic

Al2O3 (Alumina 99.5%)

Plastic

PTFE (Polytetrafluoroethylene)

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Bolts/Machine Screws Washer Setscrew Clamping Bolts/Screws Hexagon Posts Cover Caps

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Cap Pan Flat Hexagon Low Profile Special Low Profile Small Head No

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Hex Sockets Cross-recessed sockets No

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With Through Hole With Relief Cut With Built-in Washer With Groove

Select surface treatment

Special Chemical Polishing Surface hardening treatment Stainless Steel Black Silver plating Low temperature black chrome treatment Molybdenum Disulfide Shot Treatment

Select coarse/fine

Coarse Fine