Captive

These screws are designed to prevent falling out.
They reduce the risk of parts falling off and getting lost.
Ideal for bolts used to secure inspection covers that require frequent attachment and removal.

Captive_1en

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Part Name	Hex Socket Head Cap Screws with Captive Washers- High Strength Stainless Steel	Vented Socket Head Cap Screws with Captive Washers - Hign Intensity Stainless Steel	Vented Socket Head Cap Screws with Captive Wahsers	Vented Socket Head Cap Screws with Captive Wahsers - Chemical Polish	Hex Socket Head Cap Screws with Captive Washers	Vented Socket Head Cap Screws with Captive Wahsers	Socket Head Cap Screws with Washers for Sheet Metal (SEMS)	Hexagon Head Screws with Captive Washer	Hexagon Head Screws with Captive Washer
Part Number	SNSQLG	SVSQLG	SVSI1S	SVSI1S-PC	SNSQS	SVSQS	SNSQS-SUC	SNHP2S	SNHP3S
Feature	High Strength (Strength Class 10.8 Equivalent) Heat Resistance Corrosion Resistance Nonmagnetic Captive Washers I=3	High Strength (Strength Class 10.8 Equivalent) Captive Washers I=3	Captive Washers I=1	Captive Washers I=1	Captive Washers I=3	Captive Washers I=3	For Sheet Metal Captive Washers P=3	Compliant with JIS B 1187 With Captive Washer P=2	Compliant with JIS B 1187 With Captive Washer P=3
Material	SUS316L	SUS316L	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	Equivalent to SUS304	Equivalent to SUS304
Surface Treatment	-	-	-	Special Chemical Polishing	-	-	-	-	-
Thread Size	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M6	M3 ～ M12	M3 ～ M6	M4 ～ M10	M4 ～ M12
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SNSQLG-M3 SNSQLG-M4 SNSQLG-M5 SNSQLG-M6	SVSQLG-M3 SVSQLG-M4 SVSQLG-M5 SVSQLG-M6	SVSI1S-M3 SVSI1S-M4 SVSI1S-M5 SVSI1S-M6	SVSI1S-M3-PC SVSI1S-M4-PC SVSI1S-M5-PC SVSI1S-M6-PC	SNSQS-M3 SNSQS-M4 SNSQS-M5 SNSQS-M6	SVSQS-M10 SVSQS-M12 SVSQS-M3 SVSQS-M4 SVSQS-M5 SVSQS-M6 SVSQS-M8	SNSQS-M3-SUC SNSQS-M4-SUC SNSQS-M5-SUC SNSQS-M6-SUC	SNHP2S-M10 SNHP2S-M4 SNHP2S-M5 SNHP2S-M6 SNHP2S-M8	SNHP3S-M10 SNHP3S-M12 SNHP3S-M4 SNHP3S-M5 SNHP3S-M6 SNHP3S-M8

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Part Name	Phillips Pan Head Screws with Washers for Sheet Metal (SEMS)	Phillips Pan Head Screws with Washers for Sheet Metal (SEMS)	Hexalobular Socket Pan Head Machine Screws (with Pin) with Washer	Hexalobular Socket (with Pin) Pan Head Machine Screws with Washer with Nylon Patch	Phillips Cross Recessed Pan Head Machine Screws with Captive Washers	Phillips Cross Recessed Pan Head Machine Screws with Captive Washers	Titanium Hex Socket Head Cap Screws with Captive Washers	Titanium Hex Socket Head Cap Screws with Captive Washers	Titanium Hex Socket Head Cap Screws with Captive Washers
Part Number	SNPI3-SUC	SNPI3S-SUC	SRTSQ-TZB	SRTSQ-TZB-ALK	SNPI1S	SNPI3S	SNSI1T	SNSI1T-UT	SNSI3T
Feature	For Sheet Metal Space-Saving Captive Washers P=3	For Sheet Metal Space-Saving Captive Washers P=3	Hexalobular Socket With Pin Captive Washer I=3	Hexalobular Socket With Pin Captive Washer I=3	Captive Washers I=1	Captive Washers I=3	Captive Washers I=1	Captive Washers I=1	Captive Washers I=3
Material	Steel	SUSXM7 (Equivalent to SUS304)	Steel	Steel	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	Grade 2 Titanium	Grade 2 Titanium	Grade 2 Titanium
Surface Treatment	Trivalent chromate treatment	-	Trivalent chromate treatment	Trivalent chromate treatment	-	-	Special Chemical Polishing	-	Special Chemical Polishing
Thread Size	M3 ～ M5	M3 ～ M6	M2 ～ M4	M2 ～ M4	M2.5 ～ M5	M2 ～ M6	M3 ～ M6	M3 ～ M6	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	SNPI3-M3-SUC SNPI3-M4-SUC SNPI3-M5-SUC	SNPI3S-M3-SUC SNPI3S-M4-SUC SNPI3S-M5-SUC SNPI3S-M6-SUC	SRTSQ-M2.6-TZB SRTSQ-M2-TZB SRTSQ-M3-TZB SRTSQ-M4-TZB	SRTSQ-M2.6-TZB-ALK SRTSQ-M2-TZB-ALK SRTSQ-M3-TZB-ALK SRTSQ-M4-TZB-ALK	SNPI1S-M2.5 SNPI1S-M3 SNPI1S-M4 SNPI1S-M5	SNPI3S-M2 SNPI3S-M2.5 SNPI3S-M3 SNPI3S-M4 SNPI3S-M5 SNPI3S-M6	SNSI1T-M3 SNSI1T-M4 SNSI1T-M5 SNSI1T-M6	SNSI1T-M3-UT SNSI1T-M4-UT SNSI1T-M5-UT SNSI1T-M6-UT	SNSI3T-M3 SNSI3T-M4 SNSI3T-M5 SNSI3T-M6

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Part Name	Titanium Hex Socket Head Cap Screws with Captive Washers	Socket Head Cap Captive Screws - Electroless Nickel Plating	Socket Head Cap Captive Screws	Socket Head Cap Captive Screws - Cleanroom Washed & Packaged	Socket Head Cap Captive Screws - Low Temperature Black Chrome Treatment	Socket Head Cap Captive Screws - Fluorine Coating	Socket Head Cap Captive Screws - PTFE Coating	Socket Head Cap Captive Screws - SUS316L	Socket Head Cap Captive Screws - High Intensity Stainless Steel
Part Number	SNSI3T-UT	SSC-SNS-EL	SSC	SSC-UCL	SSC-RY	SSC-FC	SSC-TF	SSC-SNSL	SSC-SNSLG
Feature	Captive Washers I=3	High Strength Captive / Loss Prevention	Standard Captive / Loss Prevention	Captive/ Loss Prevention Cleanroom Washed & Packaged	Chemical Resistance Anti-reflection Seizing Prevention Captive / Loss Prevention	Seizing Prevention Captive / Loss Prevention	Chemical Resistance Seizing Prevention Captive / Loss Prevention	Non-magnetic Chemical Resistance Heat Resistance Captive / Loss Prevention	High Strength (Strength Class 10.8 Equivalent) Heat Resistance Corrosion Resistance Non-magnetic Captive / Loss Prevention
Material	Grade 2 Titanium	Steel	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUS316L
Surface Treatment	-	Electroless nickel plating	-	-	Low temperature black chrome treatment	Fluorine coating	PTFE coating	-	-
Thread Size	M3 ～ M6	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	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	SNSI3T-M3-UT SNSI3T-M4-UT SNSI3T-M5-UT SNSI3T-M6-UT	SSC-SNS-M3-EL SSC-SNS-M4-EL SSC-SNS-M5-EL SSC-SNS-M6-EL SSC-SNS-M8-EL	SSC-M3 SSC-M4 SSC-M5 SSC-M6 SSC-M8	SSC-M3-UCL SSC-M4-UCL SSC-M5-UCL SSC-M6-UCL SSC-M8-UCL	SSC-M3-RY SSC-M4-RY SSC-M5-RY SSC-M6-RY SSC-M8-RY	SSC-M3-FC SSC-M4-FC SSC-M5-FC SSC-M6-FC SSC-M8-FC	SSC-M3-TF SSC-M4-TF SSC-M5-TF SSC-M6-TF SSC-M8-TF	SSC-SNSL-M3 SSC-SNSL-M4 SSC-SNSL-M5 SSC-SNSL-M6 SSC-SNSL-M8	SSC-SNSLG-M3 SSC-SNSLG-M4 SSC-SNSLG-M5 SSC-SNSLG-M6

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Part Name	Socket Head Cap Captive Screws - Titanium	Socket Head Cap Captive Screws - High Intensity Titanium	Socket Head Cap Captive Screws and Retaining Washer Set	Vented Socket Head Cap Captive Screws	Socket Head Cap Captive Screws (Inch Screws)	Pan head captive machine screws for precision instruments (miniature screws)	Socket Head Cap Captive Screws with Low Profile	Socket Head Cap Captive Screws with Low Profile - 316L Stainless Steel	Socket Head Cap Captive Screws with Special Low Profile
Part Number	SSC-SNST	SSC-SNSTG	SSC-SET	SSC-SVSS	SSC(INCH)	SSCZS	SSCLS	SSC-SLHL	SSCHS
Feature	Lightweight Non-magnetic Chemical Resistance Captive / Loss Prevention	High Strength Lightweight Non-magnetic Corrosion Resistance Captive / Loss Prevention	Standard Captive / Loss Prevention	Captive / Loss Prevention	Inch Thread Captive / Loss Prevention	For Precision Instruments Captive / Loss Prevention	Low Profile Captive / Loss Prevention	Captive / Loss Prevention Space-Saving Low Profile	Special Low Profile Captive / Loss Prevention
Material	Grade 2 Titanium	Grade 5 Titanium	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUSXM7 (Equivalent to SUS304)
Surface Treatment	Special Chemical Polishing	-	-	-	-	-	-	-	-
Thread Size	M3 ～ M6	M3 ～ M8	M3 ～ M8	M3 ～ M8	No.4-40UNC ～ 1/4-20UNC	M1.4 ～ M2.6	M3 ～ 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	SSC-SNST-M3 SSC-SNST-M4 SSC-SNST-M5 SSC-SNST-M6	SSC-SNSTG-M3 SSC-SNSTG-M4 SSC-SNSTG-M5 SSC-SNSTG-M6 SSC-SNSTG-M8	SSC-M3-SET SSC-M4-SET SSC-M5-SET SSC-M6-SET SSC-M8-SET	SSC-SVSS-M3 SSC-SVSS-M4 SSC-SVSS-M5 SSC-SVSS-M6 SSC-SVSS-M8	SSC-#10-32 SSC-#4-40 SSC-#6-32 SSC-#8-32 SSC-1/4-20	SSCZS-M1.4 SSCZS-M1.6 SSCZS-M1.7 SSCZS-M2 SSCZS-M2.5 SSCZS-M2.6	SSCLS-M3 SSCLS-M4 SSCLS-M5 SSCLS-M6 SSCLS-M8	SSC-SLHL-M3 SSC-SLHL-M4 SSC-SLHL-M5 SSC-SLHL-M6	SSCHS-M3 SSCHS-M4 SSCHS-M5 SSCHS-M6 SSCHS-M8

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Part Name	Socket Head Cap Captive Screws with Small Head	Socket Head Cap Captive Screws with Ultra Low Small Head	Flanged Socket Head Cap Captive Screws	Hex Head Captive Screws - 316L Stainless Steel	Cross Recessed Pan Head Captive Machine Screws	Phillips Pan Head Captive Screws - SUS316L	Phillips Pan Head Captive Screws - Brass	Cross Recessed Truss Head Captive Screws	Phillips Truss Head Captive Screws - SUS316L
Part Number	SSC-SD	SSCHS-SD	SSC-SFSS	SSC-SNHL	SSCPS	SSCPL	SSCPB	SSCMS	SSCML
Feature	Small Head Space-saving Captive / Loss Prevention	Ultra Low Small Head Space-saving Captive / Loss Prevention	Flanged Captive/Loss Prevention	Captive / Loss Prevention	Pan Head Machine Screws Captive / Loss Prevention	Pan Head Machine Screws Captive / Loss Prevention	Pan Head Machine Screws Captive / Loss Prevention	Truss Head Screws Captive / Loss Prevention	Truss Head Screws Captive / Loss Prevention
Material	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)	SUS316L	SUSXM7 (Equivalent to SUS304)	SUS316L	Brass	SUSXM7 (Equivalent to SUS304)	SUS316L
Surface Treatment	-	-	-	-	-	-	-	-	-
Thread Size	M3 ～ M8	M3 ～ M8	M4 ～ M8	M3 ～ M8	M3 ～ M8	M3 ～ M8	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	SSC-M3-SD SSC-M4-SD SSC-M5-SD SSC-M6-SD SSC-M8-SD	SSCHS-M3-SD SSCHS-M4-SD SSCHS-M5-SD SSCHS-M6-SD SSCHS-M8-SD	SSC-SFSS-M4 SSC-SFSS-M5 SSC-SFSS-M6 SSC-SFSS-M8	SSC-SNHL-M3 SSC-SNHL-M4 SSC-SNHL-M5 SSC-SNHL-M6 SSC-SNHL-M8	SSCPS-M3 SSCPS-M4 SSCPS-M5 SSCPS-M6 SSCPS-M8	SSCPL-M3 SSCPL-M4 SSCPL-M5 SSCPL-M6 SSCPL-M8	SSCPB-M3 SSCPB-M4 SSCPB-M5 SSCPB-M6 SSCPB-M8	SSCMS-M3 SSCMS-M4 SSCMS-M5 SSCMS-M6 SSCMS-M8	SSCML-M3 SSCML-M4 SSCML-M5 SSCML-M6 SSCML-M8

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Part Name	Plastic Captive Washers - PC
Part Number	SPC-SW
Feature	Electrical Insulation Lightweight Shock Resistance Weather Resistance
Material	PC
Surface Treatment	-
Thread Size	M3 ～ M6
Operating Temperature (℃)	-
CAD	CAD
Specifications	Specifications
List	SPC-3-SW SPC-4-SW SPC-5-SW SPC-6-SW

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

No. 2: Vacuum environments

Description of Tamper Resistant Screws for the Engineers

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

No. 6: Thermal Cycling

Miniature Screws/Precision Screws Lineup List

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

Galling and Seizing

No. 6: Thermal Cycling

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

Select the best screws for your needs

Select Based on Application

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. 2: Vacuum environments

Galling and Seizing

No. 6: Thermal Cycling

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

What is a Coupling? Explanation of Types and Characteristics

No. 2: Vacuum environments

Description of Tamper Resistant Screws for the Engineers

SEMS Screws: Efficiency and Convenience in Fastening

What are Hex Nuts?

Theft Prevention 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 is a Coupling? Explanation of 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）

No. 2: Vacuum environments

Description of Tamper Resistant Screws for the Engineers

Galling and Seizing

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

Miniature Screws/Precision Screws Lineup List

No. 2: Vacuum environments

Description of Tamper Resistant Screws for the Engineers

Galling and Seizing

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

No. 6: Thermal Cycling

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