Galling & Seizing Prevention

What is galling & seizing prevention

＜Galling prevention by surface treatments＞
By reducing the friction coefficient of the thread surfaces with plating or coatings, the required axial force can be achieved with lower tightening torque.
As a result, he generation of friction heat during tightening is minimized, effectively preventing galling and seizing.
There are surface-hardened screws that do not cause contamination, as well as screws with gold, fluorine, MoS2, and PTFE coatings.

GallingSeizingPrevention1en1

＜Galling prevention with guided screws＞
Galling prevention with guided screws
Guides at screw tips enable easy vertical insertions into internal threads even in locations with poor workability, preventing galling and breakages caused by angled tightening.
SSC-IG_tokucyou_cad

・Self-Aligning Socket Head Cap Screws with Guide Tip

・Self-Aligning Socket Head Cap Captive Screws with Guide Tip

Image
Part Name	Self-Aligning Socket Head Cap Screws with Guide Tip	Self-Aligning Socket Head Cap Captive Screws with Guide Tip	Hex Socket Head Cap Screws - SUS316L / Surface hardening treatment	High Strength Stainless Steel Socket Head Cap Screws - Surface Hardening	Hex Socket Head Cap Screws - Fluorine Coating	Socket Head Cap Screws with Small Head - Fluorine Coating	Socket Head Cap Screws with Ultra Low Profile & Small Head - Fluorine Coating	Hex Socket Head Cap Screws - MoS₂ Coating	Socket Head Cap Screws with Small Head - MoS₂ Coating
Part Number	SNSS-IG	SSC-IG	SNSL-PN	SNSLG-PN	SNSS-FC	SNSS-SD-FC	SSHS-SD-FC	SNSS-MO	SNSS-SD-MO
Feature	With Guide Seizing Prevention	With Guide Seizing Prevention Captive/Loss Prevention	Seizing Prevention	High Strength (Strength Class 10.8 Equivalent) Heat Resistance Seizing Prevention	Seizing prevention	Small Head Space-saving Seizing Prevention	Special Low Profile Small Head Space-saving Seizing Prevention	Seizing prevention	Small Head Space-saving Seizing Prevention
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUS316L	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)
Surface Treatment	-	-	Surface hardening treatment	Surface hardening treatment	Fluorine coating	Fluorine coating	Fluorine coating	Molybdenum disulfide coating	Molybdenum disulfide coating
Thread Size	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M6	M3 ～ M10	M3 ～ M10	M3 ～ M10	M3 ～ M10	M3 ～ M10
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SNSS-M3-IG SNSS-M4-IG SNSS-M5-IG SNSS-M6-IG SNSS-M8-IG	SSC-M3-IG SSC-M4-IG SSC-M5-IG SSC-M6-IG SSC-M8-IG	SNSL-M3-PN SNSL-M4-PN SNSL-M5-PN SNSL-M6-PN SNSL-M8-PN	SNSLG-M3-PN SNSLG-M4-PN SNSLG-M5-PN SNSLG-M6-PN	SNSS-M10-FC SNSS-M3-FC SNSS-M4-FC SNSS-M5-FC SNSS-M6-FC SNSS-M8-FC	SNSS-M10-SD-FC SNSS-M3-SD-FC SNSS-M4-SD-FC SNSS-M5-SD-FC SNSS-M6-SD-FC SNSS-M8-SD-FC	SSHS-M10-SD-FC SSHS-M3-SD-FC SSHS-M4-SD-FC SSHS-M5-SD-FC SSHS-M6-SD-FC SSHS-M8-SD-FC	SNSS-M10-MO SNSS-M3-MO SNSS-M4-MO SNSS-M5-MO SNSS-M6-MO SNSS-M8-MO	SNSS-M10-SD-MO SNSS-M3-SD-MO SNSS-M4-SD-MO SNSS-M5-SD-MO SNSS-M6-SD-MO SNSS-M8-SD-MO

Image
Part Name	Socket Head Cap Screws with Ultra Low Profile & Small Head - MoS₂ Coating	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	Hex Socket Head Cap Screws - PTFE Coating	Flanged Socket Head Cap Screws - PTFE Coating	High Strength Stainless Steel Socket Head Cap Screws – PTFE Coating	Hex Socket Head Cap Screws - Gold Coating	Socket Head Cap Captive Screws - Fluorine Coating
Part Number	SSHS-SD-MO	SNSS-RY	SFSS-RY	SNSLG-RY	SNSS-TF	SFSS-TF	SNSLG-TF	SNSS-AUS	SSC-FC
Feature	Special Low Profile Small Head Space-saving 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 Seizing Prevention	Flanged Chemical Resistance Seizing Prevention	High Strength (Strength Class 10.8 Equivalent) Non-magnetic Chemical Resistance Seizing Prevention	Seizing prevention	Seizing Prevention Captive / Loss Prevention
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)
Surface Treatment	Molybdenum disulfide coating	Low temperature black chrome treatment	Low temperature black chrome treatment	Low temperature black chrome treatment	PTFE coating	PTFE coating	PTFE coating	Gold Coating (Gold Purity: 99.99 wt%)	Fluorine coating
Thread Size	M3 ～ M10	M3 ～ M10	M4 ～ M8	M3 ～ M6	M3 ～ M10	M4 ～ M8	M3 ～ M6	M3 ～ M10	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	SSHS-M10-SD-MO SSHS-M3-SD-MO SSHS-M4-SD-MO SSHS-M5-SD-MO SSHS-M6-SD-MO SSHS-M8-SD-MO	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	SNSS-M10-TF SNSS-M3-TF SNSS-M4-TF SNSS-M5-TF SNSS-M6-TF SNSS-M8-TF	SFSS-M4-TF SFSS-M5-TF SFSS-M6-TF SFSS-M8-TF	SNSLG-M3-TF SNSLG-M4-TF SNSLG-M5-TF SNSLG-M6-TF	SNSS-M10-AUS SNSS-M3-AUS SNSS-M4-AUS SNSS-M5-AUS SNSS-M6-AUS SNSS-M8-AUS	SSC-M3-FC SSC-M4-FC SSC-M5-FC SSC-M6-FC SSC-M8-FC

Image
Part Name	Socket Head Cap Captive Screws - Low Temperature Black Chrome Treatment	Socket Head Cap Captive Screws - PTFE Coating	Vented Socket Head Cap Screws - Surface Hardening	Vented High Strength Stainless Steel Socket Head Cap Screws – Surface Hardening	Vented Socket Head Cap Screws - M_OS₂ Shot	Vented Socket Head Cap Screws - Silver Plating	Vented High Strength Stainless Steel Socket Head Cap Screws – Silver Plating
Part Number	SSC-RY	SSC-TF	SVSL-PN	SVSLG-PN	SVSS-MOS	SVSS-AG	SVSLG-AG
Feature	Chemical Resistance Anti-reflection Seizing Prevention Captive / Loss Prevention	Chemical Resistance Seizing Prevention Captive / Loss Prevention	Seizing prevention	High Strength (Strength Class 10.8 Equivalent)	Seizing prevention	Seizing prevention	High Strength (Strength Class 10.8 Equivalent)
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUS316L	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L
Surface Treatment	Low temperature black chrome treatment	PTFE coating	Surface hardening treatment	Surface hardening treatment	Molybdenum Disulfide Shot Treatment	Silver plating	Silver plating
Thread Size	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M6	M3 ～ M8	M3 ～ M8	M3 ～ M6
Operating Temperature (℃)	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SSC-M3-RY SSC-M4-RY SSC-M5-RY SSC-M6-RY SSC-M8-RY	SSC-M3-TF SSC-M4-TF SSC-M5-TF SSC-M6-TF SSC-M8-TF	SVSL-M3-PN SVSL-M4-PN SVSL-M5-PN SVSL-M6-PN SVSL-M8-PN	SVSLG-M3-PN SVSLG-M4-PN SVSLG-M5-PN SVSLG-M6-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	SVSLG-M3-AG SVSLG-M4-AG SVSLG-M5-AG SVSLG-M6-AG

Latest

No. 8: Preventing Part Fall-out

Are you struggling with screw or washer fall-out during equipment assembly or maintenance?
Here we introduce products that can be used to prevent part fall-out.

What are Captive Bolts (Screws)? Introduction of the NBK Captive Series

NBK has standardized products for fall prevention of parts in the knob, pull and e-nedzi.com (special screw) categories. Use NBK's Captive Series for food machinery, packaging machinery and chemical manufacturing equipment that require CE Marking Compliance and Contamination Control.

What are Socket Head Cap Screws (Bolts) ?

Hex Socket Head Cap Screws (cap bolts) are bolts (screws) with hexagon-shaped holes in their heads. It lists product descriptions for hex socket head cap screws, recommended products, etc.

Description of Tamper Resistant Screws & Security Screws (Bolts) 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.

Helpful Resources

No. 8: Preventing Part Fall-out

What are Captive Bolts (Screws)? Introduction of the NBK Captive Series

What are Socket Head Cap Screws (Bolts) ?

What is a Swivel Mount?

Description of Tamper Resistant Screws & Security Screws (Bolts) for the Engineers

Customization

Flexus

Designs and Examples of What NBK Can Create

Ball Rollers : Characteristics

Custom made

Cleanroom Wash / Cleanroom Packing Service

Screw Length Adjustment Service

Couplings Bore and Keyway Additional Modification Service

Captive Processing Service

Screw combination service

Moving the control panel of a machine tool horizontally【Workability & Maintenance】

Galling and Seizing

No. 6: Thermal Cycling

Increased degree of vacuum in equipment is required 【Productivity increase】

Select the best screws for your needs

Slip Torque of Coupling – Set Screw Type

Property of High Performance Stainless Steel Screws

Plastic Screw Property

Vol.4 What are washers used for?

Hexagon Socket Head Cap Screws Excerpts from ISO 4762：2004, JIS B 1176:2015

Coupling and Single-axis Actuator Assembly Method

Hints for correctly using NBK products: Quick Positioning Brackets

Hints for correctly using NBK products: Captive Washer for Pull

Hints for correctly using NBK products: Metal Super Knob

Hints for correctly using NBK products: Ball Plungers

Procedure of Selection

Choosing the most suitable coupling

Choosing the most suitable coupling

Procedure of Selection (Actuator)

Procedure of Selection

No. 8: Preventing Part Fall-out

What are Captive Bolts (Screws)? Introduction of the NBK Captive Series

What is a Swivel Mount?

No. 2: Vacuum environments

Galling and Seizing

What are Captive Bolts (Screws)? Introduction of the NBK Captive Series

Description of Tamper Resistant Screws & Security Screws (Bolts) for the Engineers

No. 2: Vacuum environments

SEMS Screws: Efficiency and Convenience in Fastening

What are Hex Nuts?

What is Specific Strength? A new index for weight reduction of equipment 【Smaller and Lighter】

Preventing gaps between the sheet and screw when fastening thin sheets

Screws must be protected from chemicals 【Energy-saving / reduced work-hours】

Higher torque and Lower price.

NBK SPECIAL SCREWS

What are Couplings? Explanation of Coupling Types and Characteristics

Select Based on Application

Solving common issues with Semiconductor Manufacturing Equipment（Pre-Process）

Vol.6 Varieties of Screws "Beyond" SUS

A new generation of disk couplings

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

No. 6: Thermal Cycling

Miniature Screws/Precision Screws Lineup List

What is Specific Strength? A new index for weight reduction of equipment 【Smaller and Lighter】

What are low profile screws? Find advantages, disadvantages, and usage examples explained here!

What makes our custom screws special

Customization

NBK SPECIAL SCREWS

Flexus

Designs and Examples of What NBK Can Create

No. 6: Thermal Cycling

Select Based on Application

What is Specific Strength? A new index for weight reduction of equipment 【Smaller and Lighter】

No. 5: Solving common problems inside equipment

Solving common issues with Semiconductor Manufacturing Equipment（Pre-Process）

What are Captive Bolts (Screws)? Introduction of the NBK Captive Series

What are Socket Head Cap Screws (Bolts) ?

What is a Swivel Mount?

Description of Tamper Resistant Screws & Security Screws (Bolts) for the Engineers

No. 2: Vacuum environments

No. 8: Preventing Part Fall-out

What are Captive Bolts (Screws)? Introduction of the NBK Captive Series

What are Socket Head Cap Screws (Bolts) ?

What is a Swivel Mount?

Description of Tamper Resistant Screws & Security Screws (Bolts) for the Engineers

Vol.4　What are washers used for?

Vol.6　Varieties of Screws "Beyond" SUS

Vol.1　What is Seizing (Galling)?

Vol.4　What are washers used for?

Vol.7　Screw Tightening Control Methods