Vented Screws / Vacuum Screws processing :With Through Hole

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 processingWith Through Hole

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Part Name	Vented Socket Head Cap Screws	Vented Socket Head Cap Screws - Chemical Polish	Vented Socket Head Cap Screws - Hign 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	Vented High Strength Stainless Steel Socket Head Cap Screws – Silver Plating	Vented Socket Head Cap Screws - Hign Intensity Stainless Steel	Vented Socket Head Cap Screws with Captive Washers - Hign Intensity Stainless Steel	Vented Socket Head Cap Screws with Captive Wahsers
Part Number	SVSS	SVSS-PC	SVSLG	SVSLG-PC	SVSLG-PN	SVSLG-AG	SVSX-88	SVSQLG	SVSQS
Feature	Standard	Low Outgas	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 10.8 Equivalent)	High Strength(Strength Class 8.8)	High Strength (Strength Class 10.8 Equivalent) Captive Washers I=3	Captive Washers I=3
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUS316L	SUS316L	SUS316L	SUS316L HiMo	SUS316L	SUSXM7 (Equivalent to SUS304)
Surface Treatment	-	Special Chemical Polishing	-	Special Chemical Polishing	Surface hardening treatment	Silver plating	-	-	-
Thread Size	M2 ～ M12	M3 ～ M12	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M12
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SVSS-M10 SVSS-M12 SVSS-M2 SVSS-M2.5 SVSS-M3 SVSS-M4 SVSS-M5 SVSS-M6 SVSS-M8	SVSS-M10-PC SVSS-M12-PC SVSS-M3-PC SVSS-M4-PC SVSS-M5-PC SVSS-M6-PC SVSS-M8-PC	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	SVSLG-M3-AG SVSLG-M4-AG SVSLG-M5-AG SVSLG-M6-AG	SVSX-M3-88 SVSX-M4-88 SVSX-M5-88 SVSX-M6-88	SVSQLG-M3 SVSQLG-M4 SVSQLG-M5 SVSQLG-M6	SVSQS-M10 SVSQS-M12 SVSQS-M3 SVSQS-M4 SVSQS-M5 SVSQS-M6 SVSQS-M8

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Part Name	Vented Flanged Socket Head Cap Screws	Vented Flanged Socket Head Cap Screws – Specialized Chemical Polishing	Vented Socket Head Cap Captive Screws	Vented Socket Head Cap Screws - Titanium	Vented Socket Head Cap Screws with Low Profile	Vented Socket Head Cap Screws with Ultra Low Profile	Vented Socket Head Cap Screws with Ultra Low Profile - 316L Stainless Steel	Vented Socket Head Cap Screws with Ultra Low Profile - Titanium	Vented Socket Head Cap Screws with Small Head
Part Number	SVFSS	SVFSS-PC	SSC-SVSS	SVST	SVLS	SVSHS	SVSHL	SVSHT	SVSS-SD
Feature	With Flange	With Flange Low Outgas	Captive / Loss Prevention	Lightweight Nonmagnetic Chemical Resistance	Low Profile Small Space	Space-Saving Ultra Low Profile	Space-Saving Ultra Low Profile	Lightweight Sapce-Saving Ultra Low Profile Nonmagnetic Chemical Resistance	Standard Small Head
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	Grade 2 Titanium	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	Grade 2 Titanium	SUSXM7 (Equivalent to SUS304)
Surface Treatment	-	Special Chemical Polishing	-	Special Chemical Polishing	-	-	-	Special Chemical Polishing	-
Thread Size	M4 ～ M8	M4 ～ M8	M3 ～ M8	M3 ～ M5	M3 ～ M10	M3 ～ M6	M3 ～ M5	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	SVFSS-M4 SVFSS-M5 SVFSS-M6 SVFSS-M8	SVFSS-M4-PC SVFSS-M5-PC SVFSS-M6-PC SVFSS-M8-PC	SSC-SVSS-M3 SSC-SVSS-M4 SSC-SVSS-M5 SSC-SVSS-M6 SSC-SVSS-M8	SVST-M3 SVST-M4 SVST-M5	SVLS-M10 SVLS-M3 SVLS-M4 SVLS-M5 SVLS-M6 SVLS-M8	SVSHS-M3 SVSHS-M4 SVSHS-M5 SVSHS-M6	SVSHL-M3 SVSHL-M4 SVSHL-M5	SVSHT-M3 SVSHT-M4 SVSHT-M5 SVSHT-M6	SVSS-M10-SD SVSS-M2.5-SD SVSS-M2-SD SVSS-M3-SD SVSS-M4-SD SVSS-M5-SD SVSS-M6-SD SVSS-M8-SD

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Part Name	Vented Socket Head Cap Screws with Small Head - 316L Stainless Steel	Vented Socket Head Cap Screws with Small Head - Titanium	Vented Socket Head Cap Screws with Ultra Low Profile & Small Head	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	Vented Socket Head Cap Screws - 316L Stainless Steel	Vented Socket Head Cap Screws - Surface Hardening	Vented Socket Head Cap Screws - Inconel equiv.	Vented Socket Head Cap Screws - Hastelloy C-276 equiv.
Part Number	SVSL-SD	SVST-SD	SVSHS-SD	SVSHL-SD	SVSHT-SD	SVSL	SVSL-PN	SVSI	SVSH-C276
Feature	Small Head Corrosion Resistance Non-magnetic	Small Head Lightweight Non-magnetic Chemical Resistance Lightweight	Special Low Profile Small Head Space-saving	Special Low Profile Small Head Space-saving Non-magnetic	Special Low Profile Small Head Space-saving Lightweight Non-magnetic Chemical Resistance Lightweight	CorrosionResistance	Seizing prevention	Chemical Resistance Heat Resistance	Chemical Resistance
Material	SUS316L	Grade 2 Titanium	SUSXM7 (Equivalent to SUS304)	SUS316L	Grade 2 Titanium	SUS316L	SUS316L	Inconel equiv.	Hastelloy equiv.
Surface Treatment	-	Special Chemical Polishing	-	-	Special Chemical Polishing	-	Surface hardening treatment	-	-
Thread Size	M2 ～ M8	M3 ～ M5	M3 ～ M6	M3 ～ M5	M3 ～ M6	M3 ～ M12	M3 ～ M8	M3 ～ M8	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	SVSL-M2-SD SVSL-M3-SD SVSL-M4-SD SVSL-M5-SD SVSL-M6-SD SVSL-M8-SD	SVST-M3-SD SVST-M4-SD SVST-M5-SD	SVSHS-M3-SD SVSHS-M4-SD SVSHS-M5-SD SVSHS-M6-SD	SVSHL-M3-SD SVSHL-M4-SD SVSHL-M5-SD	SVSHT-M3-SD SVSHT-M4-SD SVSHT-M5-SD SVSHT-M6-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	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

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Part Name	Vented Socket Head Cap Screws - Hastelloy C-22 equiv.	Vented Socket Head Cap Screws - Molybdenum	Vented Socket Head Cap Screws - Aluminum	Vented Hex Head Screws	Vented Hex Socket Flat Head Machine Screws	Vented Cross Recessed Flat Head Machine Screws	Vented Cross Recessed Flat Head Machine Screws - Titanium	Vented Cross Recessed Pand Head Machine Screws	Vented Cross Recessed Pand Head Machine Screws - Titanium
Part Number	SVSH-C22	SVSM	SVSA	SVHS	SVFCS	SVFS	SVFT	SVPS	SVPT
Feature	Chemical Resistance	Heat Resistance	Lightweight	Hex head screws	Hex Socket CountersunkHead Screws Small Space	Flat Head Machine Screws Small Space	Titanium Phillips Cross Recessed Flat Head Machine Screw Low outgas Nonmagnetic	Pan Head Machine Screws	Titanium Phillips Cross Recessed Pan Head Machine Screw Low outgas Nonmagnetic
Material	Hastelloy equiv.	Pure molybdenum	A5056	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	Grade 2 Titanium	SUSXM7 (Equivalent to SUS304)	Grade 2 Titanium
Surface Treatment	-	-	-	-	-	-	Special Chemical Polishing	-	Special Chemical Polishing
Thread Size	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	M2 ～ M6	M3 ～ M4	M3 ～ M8	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	SVSH-M3-C22 SVSH-M4-C22 SVSH-M5-C22 SVSH-M6-C22 SVSH-M8-C22	SVSM-M3 SVSM-M4 SVSM-M5 SVSM-M6 SVSM-M8	SVSA-M3 SVSA-M4 SVSA-M5 SVSA-M6 SVSA-M8	SVHS-M3 SVHS-M4 SVHS-M5 SVHS-M6 SVHS-M8	SVFCS-M3 SVFCS-M4 SVFCS-M5 SVFCS-M6 SVFCS-M8	SVFS-M2 SVFS-M2.6 SVFS-M3 SVFS-M4 SVFS-M5 SVFS-M6	SVFT-M3 SVFT-M4	SVPS-M3 SVPS-M4 SVPS-M5 SVPS-M6 SVPS-M8	SVPT-M3 SVPT-M4 SVPT-M5

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Part Name	Vented Inch Socket Head Cap Screws	Vented Socket Head Cap Screws - M_OS₂ Shot	Vented Socket Head Cap Screws - Silver Plating	Vented Set Screws	Vented Hex Posts	Vented Clamping Set Screws	Vented Clamping Set Screws
Part Number	SVSS(INCH)	SVSS-MOS	SVSS-AG	SVTS	SHVAS	SCSS-VR	SCSS-VF
Feature	Inch Thread Socket Head Cap Screws	Seizing prevention	Seizing prevention	Set Screws	Stainless Steel Single - end Female Screw Type	For Fixing Full Ball	For Fixing Flat Ball
Material	Equivalent to SUS304	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS304	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)
Surface Treatment	-	Molybdenum Disulfide Shot Treatment	Silver plating	-	-	-	-
Thread Size	No.4-40UNC ～ 1/4-20UNC	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	M5 ～ M10	M5 ～ M10
Operating Temperature (℃)	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SVSS-#10-24 SVSS-#10-32 SVSS-#4-40 SVSS-#5-40 SVSS-#6-32 SVSS-#8-32 SVSS-1/4-20	SVSS-M3-MOS SVSS-M4-MOS SVSS-M5-MOS SVSS-M6-MOS SVSS-M8-MOS	SVSS-M3-AG SVSS-M4-AG SVSS-M5-AG SVSS-M6-AG SVSS-M8-AG	SVTS-M3 SVTS-M4 SVTS-M5 SVTS-M6 SVTS-M8	SHVAS-M3 SHVAS-M4 SHVAS-M5 SHVAS-M6 SHVAS-M8	SCSS-M10-16-VR SCSS-M10-20-VR SCSS-M10-25-VR SCSS-M10-35-VR SCSS-M5-12-VR SCSS-M5-20-VR SCSS-M5-8-VR SCSS-M6-10-VR SCSS-M6-16-VR SCSS-M6-20-VR SCSS-M6-25-VR SCSS-M8-10-VR SCSS-M8-12-VR SCSS-M8-20-VR SCSS-M8-25-VR SCSS-M8-30-VR	SCSS-M10-16-VF SCSS-M10-20-VF SCSS-M10-25-VF SCSS-M10-35-VF SCSS-M5-12-VF SCSS-M5-20-VF SCSS-M5-8-VF SCSS-M6-10-VF SCSS-M6-16-VF SCSS-M6-20-VF SCSS-M6-25-VF SCSS-M8-10-VF SCSS-M8-12-VF SCSS-M8-20-VF SCSS-M8-25-VF SCSS-M8-30-VF

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 Chemical-proof 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 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