Vented Screws / Vacuum Screws characteristics/function :Chemical 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/functionChemical Resistance

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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	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	Hex Socket Head Cap Screws with Ventilation Hole - Titanium	Vented Socket Head Cap Screws with Ultra Low Profile - Titanium	Vented Socket Head Cap Screws with Small Head - Titanium	Vented Socket Head Cap Screws with Ultra Low Profile & Small Head - 316L Stainless Steel	Vented Socket Head Cap Screws with Ultra Low Profile & Small Head - Titanium
Part Number	SVSLG	SVSLG-PC	SVSX-88	SVSQLG	SVST	SVSHT	SVST-SD	SVSHL-SD	SVSHT-SD
Feature	High Strength(Equivalent to Strength Class 10.8)	High Strength (Strength Class 10.8 Equivalent)	High Strength(Strength Class 8.8)	High Strength (Strength Class 10.8 Equivalent) Captive Washers I=3	Lightweight Nonmagnetic Chemical Resistance	Lightweight Sapce-Saving Ultra Low Profile Nonmagnetic Chemical Resistance	Small Head Lightweight Non-magnetic Chemical Resistance Lightweight	Special Low Profile Small Head Space-saving Non-magnetic	Special Low Profile Small Head Space-saving Lightweight Non-magnetic Chemical Resistance Lightweight
Material	SUS316L	SUS316L	SUS316L HiMo	SUS316L	Grade 2 Titanium	Grade 2 Titanium	Grade 2 Titanium	SUS316L	Grade 2 Titanium
Surface Treatment	-	Special Chemical Polishing	-	-	Special Chemical Polishing	Special Chemical Polishing	Special Chemical Polishing	-	Special Chemical Polishing
Thread Size	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M5	M3 ～ M6	M3 ～ M5	M3 ～ M5	M3 ～ M6
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	SVSX-M3-88 SVSX-M4-88 SVSX-M5-88 SVSX-M6-88	SVSQLG-M3 SVSQLG-M4 SVSQLG-M5 SVSQLG-M6	SVST-M3 SVST-M4 SVST-M5	SVSHT-M3 SVSHT-M4 SVSHT-M5 SVSHT-M6	SVST-M3-SD SVST-M4-SD SVST-M5-SD	SVSHL-M3-SD SVSHL-M4-SD SVSHL-M5-SD	SVSHT-M3-SD SVSHT-M4-SD SVSHT-M5-SD SVSHT-M6-SD

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Part Name	Hex Socket Head Cap Screws (Inconel equiv.) with Ventilation Hole	Hex Socket Head Cap Screws (Hastelloy C-276 equiv.) with Ventilation Hole	Hex Socket Head Cap Screws (Hastelloy C-22 equiv.) with Ventilation Hole	Cover Caps	Cover Caps	Cover Caps - PTFE	Socket Head Cap Screws - 316L Stainless Steel - Specialized Chemical Polishing	High Strength Stainless Steel Socket Head Cap Screws - Specialized Chemical Polishing	Hex Socket Head Cap Screws - Super Black
Part Number	SVSI	SVSH-C276	SVSH-C22	SCAP-AL	SCAP-CE	SCAP-PT	SNSL-PC	SNSLG-PC	SNSS-BK
Feature	Chemical Resistance Heat Resistance	Chemical Resistance	Chemical Resistance	Low Outgas Corrosion Resistance	Heat Resistance Chemical Resistance Electrical Insulation	Chemical Resistance	Heat Resistance Corrosion Resistance Non-magnetic Low Outgas	High Strength (Strength Class 10.8 Equivalent) Low Outgas Non-magnetic	Reflection Resistance Corrosion Resistance
Material	Inconel equiv.	Hastelloy equiv.	Hastelloy equiv.	A5056	Al2O3 (Alumina 99.5%)	PTFE (Polytetrafluoroethylene)	SUS316L	SUS316L	SUSXM7 (Equivalent to SUS304)
Surface Treatment	-	-	-	-	-	-	Special Chemical Polishing	Special Chemical Polishing	Stainless Steel Black
Thread Size	M3 ～ M8	M3 ～ M8	M3 ～ M8	M5 ～ M16	M5 ～ M16	M5 ～ M16	M3 ～ M8	M3 ～ M6	M2 ～ M10
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SVSI-M3 SVSI-M4 SVSI-M5 SVSI-M6 SVSI-M8	SVSH-M3-C276 SVSH-M4-C276 SVSH-M5-C276 SVSH-M6-C276 SVSH-M8-C276	SVSH-M3-C22 SVSH-M4-C22 SVSH-M5-C22 SVSH-M6-C22 SVSH-M8-C22	SCAP-10-AL SCAP-3-AL SCAP-4-AL SCAP-5-AL SCAP-6-AL SCAP-8-AL	SCAP-10-CE SCAP-3-CE SCAP-4-CE SCAP-5-CE SCAP-6-CE SCAP-8-CE	SCAP-10-PT SCAP-3-PT SCAP-4-PT SCAP-5-PT SCAP-6-PT SCAP-8-PT	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	SNSS-M10-BK SNSS-M2-BK SNSS-M3-BK SNSS-M4-BK SNSS-M5-BK SNSS-M6-BK SNSS-M8-BK

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Part Name	Hex Socket Head Cap Screws - Low Temperature Black Chrome	Flanged Socket Head Cap Screws - Low Temperature Black Chrome Treatment	High Strength Stainless Steel Socket Head Cap Screws – Low Temperature Black Chrome Treatment	Socket Head Cap Captive Screws - Low Temperature Black Chrome Treatment	Titanium Hex Socket Head Cap Screws with Captive Washers	Titanium Hex Socket Head Cap Screws with Captive Washers	Hex Socket Head Cap Screws - 316L Stainless Steel ｰ Cleanroom Washed & Packaged	High Strength Stainless Steel Socket Head Cap Screws - Cleanroom Washed & Packaged	Socket Head Cap Screws with Ultra Low Profile - 316L Stainless Steel - Cleanroom Washed & Packaged
Part Number	SNSS-RY	SFSS-RY	SNSLG-RY	SSC-RY	SNSI1T	SNSI3T	SNSL-UCL	SNSLG-UCL	SSHL-UCL
Feature	Chemical Resistance Reflection Resistance Seizing Prevention	Flanged Chemical Resistance Anti-reflection Seizing Prevention	High Strength (Strength Class 10.8 Equivalent) Non-magnetic Chemical Resistance Anti-reflection Seizing Prevention	Chemical Resistance Anti-reflection Seizing Prevention Captive / Loss Prevention	Captive Washers I=1	Captive Washers I=3	Cleanroom Washed & Packaged	High Strength (Strength Class 10.8 Equiv.) Heat Resistance Corrosion Resistance Non-magnetic Cleanroom Washed & Packaged	Space-Saving Ultra Low Profile Cleanroom Washed & Packaged
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUSXM7 (Equivalent to SUS304)	Grade 2 Titanium	Grade 2 Titanium	SUS316L	SUS316L	SUS316L
Surface Treatment	Low temperature black chrome treatment	Low temperature black chrome treatment	Low temperature black chrome treatment	Low temperature black chrome treatment	Special Chemical Polishing	Special Chemical Polishing	-	-	-
Thread Size	M3 ～ M10	M4 ～ M8	M3 ～ M6	M3 ～ M8	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M5
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SNSS-M10-RY SNSS-M3-RY SNSS-M4-RY SNSS-M5-RY SNSS-M6-RY SNSS-M8-RY	SFSS-M4-RY SFSS-M5-RY SFSS-M6-RY SFSS-M8-RY	SNSLG-M3-RY SNSLG-M4-RY SNSLG-M5-RY SNSLG-M6-RY	SSC-M3-RY SSC-M4-RY SSC-M5-RY SSC-M6-RY SSC-M8-RY	SNSI1T-M3 SNSI1T-M4 SNSI1T-M5 SNSI1T-M6	SNSI3T-M3 SNSI3T-M4 SNSI3T-M5 SNSI3T-M6	SNSL-M3-UCL SNSL-M4-UCL SNSL-M5-UCL SNSL-M6-UCL	SNSLG-M3-UCL SNSLG-M4-UCL SNSLG-M5-UCL SNSLG-M6-UCL	SSHL-M3-UCL SSHL-M4-UCL SSHL-M5-UCL

Latest

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

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

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

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.

Helpful Resources

Click here to see Special Screws

Screws compatible with clean environments

Low Profile Screws / Small Head Screws

High Performance Stainless Steel Screws

Titanium Screws

Special Material Screws

Tools

Screws with Special Surface Treatment

Micro Screws

Captive Screws / Full Thread Screws

Quick Release Fasteners

Functional Screws

UNC Screws / UNF Screws

Security screws / Tamper Resistant Screws

Hexalobular Screws

Plugs

Washers / Inserts

Plastic Screws

Vibration Resistance

Screw Caps / Screw Covers

Chemical Resistance Screws

Socket Head Cap Screws

Hex Head Screws

Sheet Metal Fasteners

Vacuum

Low Outgassing

Cleanroom

Chemical Resistance

High Strength

High Specific Strength

Heat Resistance

Galling & Seizing Prevention

Prevention of Screw Drive Damage

Anti-Reflective

Electrical Insulation

Non-Magnetic

Lightweight

Compact and Space-Saving

Increased Productivity

Captive

Loosening Prevention

Decoration

Fixing and Positioning

Conveyance

SEMS Screws / Improved Fastening Efficiency Screws

Recommended Items for You

Select characteristics/function

Vacuum LowOutgas Cleanroom Specification Space High strength High Specific Strength Heat-resistance 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)

Select thread/components

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

Select head shape

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

Select drive shape

Hex Sockets Cross-recessed sockets No

Select processing

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