Vented Screws / Vacuum Screws characteristics/function :Seizing Prevention

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/functionSeizing Prevention

Image
Part Name	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 - Surface Hardening	Vented Socket Head Cap Screws - M_OS₂ Shot	Vented Socket Head Cap Screws - Silver Plating	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
Part Number	SVSLG-PN	SVSLG-AG	SVSL-PN	SVSS-MOS	SVSS-AG	SNSS-RY	SFSS-RY	SNSLG-RY	SSC-RY
Feature	High Strength (Strength Class 10.8 Equivalent)	High Strength (Strength Class 10.8 Equivalent)	Seizing prevention	Seizing prevention	Seizing prevention	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
Material	SUS316L	SUS316L	SUS316L	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUSXM7 (Equivalent to SUS304)
Surface Treatment	Surface hardening treatment	Silver plating	Surface hardening treatment	Molybdenum Disulfide Shot Treatment	Silver plating	Low temperature black chrome treatment	Low temperature black chrome treatment	Low temperature black chrome treatment	Low temperature black chrome treatment
Thread Size	M3 ～ M6	M3 ～ M6	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M10	M4 ～ M8	M3 ～ M6	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-PN SVSLG-M4-PN SVSLG-M5-PN SVSLG-M6-PN	SVSLG-M3-AG SVSLG-M4-AG SVSLG-M5-AG SVSLG-M6-AG	SVSL-M3-PN SVSL-M4-PN SVSL-M5-PN SVSL-M6-PN SVSL-M8-PN	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	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

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 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