Washers・Insert

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Part Name	High Intensity Flat Washers	Adjust Metal Washer - Steel - Ferrosoferric Oxide Film	Adjust Metal Washer - Steel - Electroless Nickel Plating	Adjust Metal Washer - Stainless Steel	Adjust Metal Washer - Stainless Steel Black	Washers (Galvanic Corrosion Prevention Treatment)	Flat Washer for Slotted Holes	Washers with Ventilation Grooves	Washers with Ventilation Grooves
Part Number	SWF	SWA-AW	SWA-AWEL	SWAS-AW	SWAS-AWBK	SWA-F-GJ	SWAS-PPK	SWAS-VF	SWAS-VF-PC
Feature	Vibration Resistant High Strength	Wide Variety	Wide Variety	Wide Variety	Wide Variety Reflection Resistance Corrosion Resistance	Galvanic Corrosion Prevention	Flat Washers for Slotted Holes	Standard	Low outgas
Material	Steel	Steel	Steel	SUS304	SUS304	Steel	-	SUS304	SUS304
Surface Treatment	Ferrosoferric Oxide Film (Black)	Ferrosoferric Oxide Film (Black)	Electroless nickel plating	-	Stainless Steel Black	Galvanic Corrosion Prevention Treatment	-	-	Special Chemical Polishing
Thread Size	M6 ～ M16	M2 ～ M16	M2 ～ M16	M2 ～ M16	M3 ～ M16	M5 ～ M16	M5 ～ M10	M2 ～ M12	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	SWF-10 SWF-12 SWF-16 SWF-6 SWF-8	SWA-10-12-AW SWA-10-16-AW SWA-10-20-AW SWA-10-25-AW SWA-10-30-AW SWA-12-16-AW SWA-12-20-AW SWA-12-25-AW SWA-12-30-AW SWA-16-20-AW SWA-16-25-AW SWA-16-30-AW SWA-2-8-AW SWA-3-8-AW SWA-4-10-AW SWA-4-12-AW SWA-4-15-AW SWA-4-8-AW SWA-5-10-AW SWA-5-12-AW SWA-5-15-AW SWA-5-16-AW SWA-5-20-AW SWA-5-8-AW SWA-6-10-AW SWA-6-12-AW SWA-6-15-AW SWA-6-16-AW SWA-6-20-AW SWA-6-25-AW SWA-8-12-AW SWA-8-16-AW SWA-8-20-AW SWA-8-25-AW SWA-8-30-AW	SWA-10-12-AWEL SWA-10-16-AWEL SWA-10-20-AWEL SWA-10-25-AWEL SWA-10-30-AWEL SWA-12-16-AWEL SWA-12-20-AWEL SWA-12-25-AWEL SWA-12-30-AWEL SWA-16-20-AWEL SWA-16-25-AWEL SWA-16-30-AWEL SWA-2-8-AWEL SWA-3-8-AWEL SWA-4-10-AWEL SWA-4-12-AWEL SWA-4-15-AWEL SWA-4-8-AWEL SWA-5-10-AWEL SWA-5-12-AWEL SWA-5-15-AWEL SWA-5-16-AWEL SWA-5-20-AWEL SWA-5-8-AWEL SWA-6-10-AWEL SWA-6-12-AWEL SWA-6-15-AWEL SWA-6-16-AWEL SWA-6-20-AWEL SWA-6-25-AWEL SWA-8-12-AWEL SWA-8-16-AWEL SWA-8-20-AWEL SWA-8-25-AWEL SWA-8-30-AWEL	SWAS-10-12-AW SWAS-10-16-AW SWAS-10-20-AW SWAS-10-25-AW SWAS-10-30-AW SWAS-12-16-AW SWAS-12-20-AW SWAS-12-25-AW SWAS-12-30-AW SWAS-16-20-AW SWAS-16-25-AW SWAS-16-30-AW SWAS-2-8-AW SWAS-3-8-AW SWAS-4-10-AW SWAS-4-12-AW SWAS-4-15-AW SWAS-4-8-AW SWAS-5-10-AW SWAS-5-12-AW SWAS-5-15-AW SWAS-5-16-AW SWAS-5-20-AW SWAS-5-8-AW SWAS-6-10-AW SWAS-6-12-AW SWAS-6-15-AW SWAS-6-16-AW SWAS-6-20-AW SWAS-6-25-AW SWAS-8-12-AW SWAS-8-16-AW SWAS-8-20-AW SWAS-8-25-AW SWAS-8-30-AW	SWAS-10-12-AWBK SWAS-10-16-AWBK SWAS-10-20-AWBK SWAS-10-25-AWBK SWAS-12-16-AWBK SWAS-12-20-AWBK SWAS-12-25-AWBK SWAS-16-25-AWBK SWAS-3-8-AWBK SWAS-4-10-AWBK SWAS-4-12-AWBK SWAS-4-8-AWBK SWAS-5-10-AWBK SWAS-5-12-AWBK SWAS-5-16-AWBK SWAS-5-20-AWBK SWAS-5-8-AWBK SWAS-6-10-AWBK SWAS-6-12-AWBK SWAS-6-16-AWBK SWAS-6-20-AWBK SWAS-6-25-AWBK SWAS-8-12-AWBK SWAS-8-16-AWBK SWAS-8-20-AWBK SWAS-8-25-AWBK	SWA-10.5-21-2-F-GJ SWA-13-24-2.5-F-GJ SWA-17-30-3-F-GJ SWA-5.3-10-1-F-GJ SWA-6.5-13-1-F-GJ SWA-8.5-18-1.6-F-GJ	SWAS-10-30-3-2-PPK SWAS-5-20-2-2-PPK SWAS-6-20-2-2-PPK SWAS-8-25-3-2-PPK	SWAS-10-VF SWAS-12-VF SWAS-2.5-VF SWAS-2-VF SWAS-3-VF SWAS-4-VF SWAS-5-VF SWAS-6-VF SWAS-8-VF	SWAS-10-VF-PC SWAS-12-VF-PC SWAS-3-VF-PC SWAS-4-VF-PC SWAS-5-VF-PC SWAS-6-VF-PC SWAS-8-VF-PC

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Part Name	Washers with Ventilation Grooves - Titanium	Hex Nuts / Washers - Inch Thread	Hex Nuts / Washers - Inch Thread	Plain Washers for High Strength Stainless Steel Bolts	Washer - SUS310S	Washers - Titanium	Washers - Titanium	Inconel Washer	Washers - Molybdenum
Part Number	SWAT-VF	SWAS-IF	SWAS-IS	SWALG-F	SWAJ-F	SWAT-F	SWAT-S	SWAI-F	SWAM-F
Feature	Lightweight Nonmagnetic	For Inch Screws	For Inch Screws	Heat Resistance Chemical Resistance	Heat Resistance Chemical Resistance	Lightweight Nonmagnetic Chemical Resistance	Lightweight Nonmagnetic Chemical Resistance	Chemical Resistance Heat Resistance	Heat Resistance
Material	Pure Titanium	Equivalent to SUS304	Equivalent to SUS304	SUS316L	SUS310S	Pure Titanium	Pure Titanium	Inconel equiv.	Pure molybdenum
Surface Treatment	-	-	-	-	-	-	-	-	-
Thread Size	M3 ～ M5	No.4-40UNC ～ 3/8-16UNC	No.4-40UNC ～ 3/8-16UNC	M3 ～ M6	M3 ～ M10	M3 ～ M10	M3 ～ M10	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	SWAT-3-VF SWAT-4-VF SWAT-5-VF	SWAS-#10-IF SWAS-#4-IF SWAS-#6-IF SWAS-#8-IF SWAS-1/4-IF SWAS-3/8-IF SWAS-5/16-IF	SWAS-#10-IS SWAS-#4-IS SWAS-#6-IS SWAS-#8-IS SWAS-1/4-IS SWAS-3/8-IS SWAS-5/16-IS	SWALG-3-F SWALG-4-F SWALG-5-F SWALG-6-F	SWAJ-10-F SWAJ-3-F SWAJ-4-F SWAJ-5-F SWAJ-6-F SWAJ-8-F	SWAT-10-F SWAT-3-F SWAT-4-F SWAT-5-F SWAT-6-F SWAT-8-F	SWAT-10-S SWAT-3-S SWAT-4-S SWAT-5-S SWAT-6-S SWAT-8-S	SWAI-3-F SWAI-4-F SWAI-5-F SWAI-6-F SWAI-8-F	SWAM-3-F SWAM-4-F SWAM-5-F SWAM-6-F SWAM-8-F

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Part Name	Captive Washers	Ribbed Lock Washers	Ribbed Lock Washers	Spherical Washers	Spherical Washers	Eccentric Lock Washer™	Rosette Washer	Seal Washer	Seal Washer
Part Number	SWAS-SC	SWR	SWRS	SQW	SQWS	SWAS-EW	SWAS-RW	SWS	SWS-F
Feature	Commercially Available Fall Prevention	Vibration Resistant	Vibration Resistant	Supports SurfaceTilt to 2°	Supports SurfaceTilt to 2°or　3°	Vibration resistant treatment with commercial hexagon nut	for Flat Head Screw	Air and Liquid LeakPrevention	Air and Liquid LeakPrevention
Material	-	Steel	Stainless Steel	Steel	SUS304	SUS304	SUS303	SUS304	SUS304
Surface Treatment	-	Ferrosoferric Oxide Film (Black)	-	Ferrosoferric Oxide Film (Black)	-	-	-	-	-
Thread Size	M3 ～ M12	M2 ～ M20	M1.6 ～ M20	M3 ～ M12	M3 ～ M24	M6 ～ M12	M3 ～ M6	M3 ～ M16	M3 ～ M16
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SWAS-10-SC SWAS-12-SC SWAS-3-SC SWAS-4-SC SWAS-5-SC SWAS-6-SC SWAS-8-SC	SWR-10 SWR-12 SWR-16 SWR-2 SWR-2.5 SWR-20 SWR-3 SWR-4 SWR-5 SWR-6 SWR-8	SWRS-1.6 SWRS-10 SWRS-12 SWRS-16 SWRS-2 SWRS-2.5 SWRS-20 SWRS-3 SWRS-4 SWRS-5 SWRS-6 SWRS-8	SQW-10 SQW-12 SQW-3 SQW-4 SQW-5 SQW-6 SQW-8	SQWS-10 SQWS-12 SQWS-16 SQWS-20 SQWS-24 SQWS-3 SQWS-4 SQWS-5 SQWS-6 SQWS-8	SWAS-10-EW SWAS-12-EW SWAS-6-EW SWAS-8-EW	SWAS-3-RW SWAS-4-RW SWAS-5-RW SWAS-6-RW	SWS-10 SWS-12 SWS-16 SWS-3 SWS-4 SWS-5 SWS-6 SWS-8	SWS-10-F SWS-12-F SWS-16-F SWS-3-F SWS-4-F SWS-5-F SWS-6-F SWS-8-F

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Part Name	Seal washer	Seal washer	Seal Washers - PFA Coating	Locking and Sealing Rings	Locking and Sealing Rings	Plastic Screw - Hex Nuts / Washers - PTFE	Plastic Screw - Hex Nuts / Washers - PEEK	Plastic Screw - Hex Nuts / Washers - PPS	Plastic Screw - Hex Nuts / Washers - PP
Part Number	SWS-E	SWS-S	SWS-HTF	SWC	SWH	SPT-W	SPE-W	SPS-W	SPP-W
Feature	Air and Liquid LeakPrevention	Prevention of air/liquid leakage	Chemical Resistance	For socket head cap screws	For hex head screws and hex nuts	Chemical Resistance Heat Resistance Electrical Insulation	Chemical Resistance Heat Resistance	Heat Resistance Chemical Resistance	Chemical Resistance
Material	SUS304	SUS304	SUS304	Polyamide	Polyamide	PTFE (Polytetrafluoroethylene)	PEEK	PPS	PP
Surface Treatment	-	-	PFA Coating	-	-	-	-	-	-
Thread Size	M3 ～ M16	M3 ～ M16	M3 ～ M8	M4 ～ M12	M3 ～ M12	M3 ～ M12	M2 ～ M10	M3 ～ M12	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	SWS-10-E SWS-12-E SWS-16-E SWS-3-E SWS-4-E SWS-5-E SWS-6-E SWS-8-E	SWS-10-S SWS-12-S SWS-16-S SWS-3-S SWS-4-S SWS-5-S SWS-6-S SWS-8-S	SWS-3-HTF SWS-4-HTF SWS-5-HTF SWS-6-HTF SWS-8-HTF	SWC-10 SWC-12 SWC-4 SWC-5 SWC-6 SWC-8	SWH-10 SWH-12 SWH-3 SWH-4 SWH-5 SWH-6 SWH-8	SPT-10-W SPT-12-W SPT-3-W SPT-4-W SPT-5-W SPT-6-W SPT-8-W	SPE-10-W SPE-2.6-W SPE-2-W SPE-3-W SPE-4-W SPE-5-W SPE-6-W SPE-8-W	SPS-10-W SPS-12-W SPS-3-W SPS-4-W SPS-5-W SPS-6-W SPS-8-W	SPP-10-W SPP-12-W SPP-4-W SPP-5-W SPP-6-W SPP-8-W

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Part Name	Plastic Screw - Hex Nuts / Washers - RENY	Plastic Screw - Hex Nuts / Washers - PC	Plastic Screws - Hex Nuts / Washers - PVDF	Cover Caps for Socket Head Cap Screws	Cover Caps for Hex Head Screw	Key locking threaded insert for thread reinforcement	Dedicated Mounting Tool for Keyed Female-Thread Reinforcing Insert
Part Number	SPA-W	SPC-W	SPV-W	SCC	SCH	SHINS	SKK
Feature	High Strength	Shock Resistance Weather Resistance	Chemical Resistance	For socket head cap screws	For Hex Head	Key locking threaded insert thread reinforcement	Dedicated Mounting Tool for SHINS
Material	RENY	PC	PVDF	Polyethylene	Polyethylene	SUS303	SUS303
Surface Treatment	-	-	-	-	-	-	-
Thread Size	M3 ～ M16	M2 ～ M8	M3 ～ M12	M5 ～ M20	M5 ～ M16	M4 ～ M12	-
Operating Temperature (℃)	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SPA-10-W SPA-12-W SPA-16-W SPA-3-W SPA-4-W SPA-5-W SPA-6-W SPA-8-W	SPC-2.6-W SPC-2-W SPC-3-W SPC-4-W SPC-5-W SPC-6-W SPC-8-W	SPV-10-W SPV-12-W SPV-3-W SPV-4-W SPV-5-W SPV-6-W SPV-8-W	SCC-10 SCC-14 SCC-17 SCC-4 SCC-5 SCC-6 SCC-8	SCH-10 SCH-12 SCH-16 SCH-5 SCH-6 SCH-8	SHINS-M10-M14 SHINS-M12-M16 SHINS-M4-M8 SHINS-M5-M8 SHINS-M6-M10 SHINS-M8-M12	SKK-10 SKK-12 SKK-45 SKK-6 SKK-8

Latest

Captive Processing Service

For customers who want to prevent screws from falling off

We can add relief-cut treatment to screws to prevent them from falling off.

Cleanroom Wash / Cleanroom Packing Service

For customers who want to remove impurities and dust from the surface of products

We will cleanroom wash and cleanroom pack products as desired.

Screw Length Adjustment Service

For customers who require screws of non-standard lengths

We can cut screws to your preferred length in 1 mm increments.

Screw combination service

For customers who want to change the threaded portion of a lever or knob

Have your chosen screw delivered attached to a lever/knob female screw product!

Helpful Resources

About Couplings

Couplings Bore and Keyway Additional Modification Service

Captive Processing Service

Cleanroom Wash / Cleanroom Packing Service

Screw Length Adjustment Service

Flexus【Muilti-Functional Machined Slotted Springs】

Designs and Examples of What NBK Can Create

Ball Rollers : Characteristics

Custom made

Special specifications

Couplings Bore and Keyway Additional Modification Service

Captive Processing Service

Cleanroom Wash / Cleanroom Packing Service

Screw Length Adjustment Service

Screw combination service

Solving common issues with Food Machinery（Food Packaging Machine）

CE-marked components which prevent foreign matter contamination are required 【Safety / precautionary measures】

Select the best screws for your needs

No. 7: SEMI Standards

No. 6: Thermal Cycling

Property of Special Material Screws

Hexalobular Internal Driving Feature for Bolts and Screws

Plastic Screw Property

The Anti-Vibration Coupling with High Rigidity

Advancements in Servomotor Coupling Technology

Hints for correctly using NBK products: Quick Positioning Brackets

Auto-Positioning Units Frequently Asked Questions (FAQ)

Hints for correctly using NBK products: Retractable revolving grip

Hints for correctly using NBK products: Set Collars

Hints for correctly using NBK products: Captive Series (relief-cut thread)

Choosing the most suitable coupling

Choosing the most suitable coupling

Procedure of Selection (Actuator)

Procedure of Selection

Procedure of Selection

About Couplings

Solving common issues with Food Machinery（Food Packaging Machine）

Use the NBK Captive Screw Series to be comply with CE

No. 8: Preventing Part Fall-out

What are Captive Screws? Introduction of the NBK Captive Series

Solving common issues with Food Machinery（Food Packaging Machine）

CE-marked components which prevent foreign matter contamination are required 【Safety / precautionary measures】

Use the NBK Captive Screw Series to be comply with CE

What are Captive Screws? Introduction of the NBK Captive Series

No. 7: SEMI Standards

Machining marks must be prevented 【Energy-saving / reduced work-hours】

Improvement points for FA Devices【Control Design】

Solving common issues with Machine Tools（Machining Center）

Improvement points for FA Devices【Unit Design】

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

About Couplings

Collaboration Webinar: The Best Solutions for Shortening a Positioning Time by Using NBK's Couplings and SANYO DENKI's Servo Motors

The Optimized Coupling ”XG Family"（Teaser ver.）

Raising/lowering shaft vibration must be suppressed 【Improved Productivity】

Webinar: How can we speed up and reduce the cost of the Motion Control System with Shaft Couplings?

Small Diameter Screws: M0.6 (S0.6) to M2.6 Lineup

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

What are clamp levers? Here we explain the characteristics and usage methods that help streamline screw tightening!

No. ９: Increasing Throughput

No. 6: Thermal Cycling

Flexus【Muilti-Functional Machined Slotted Springs】

NBK SPECIAL SCREWS

Designs and Examples of What NBK Can Create

Ball Rollers : Characteristics

Custom made

No. 6: Thermal Cycling

No. 5: Solving common problems inside equipment

Collaboration Webinar: The Best Solutions for Shortening a Positioning Time by Using NBK's Couplings and SANYO DENKI's Servo Motors

The Optimized Coupling ”XG Family"（Teaser ver.）

Webinar: How can we speed up and reduce the cost of the Motion Control System with Shaft Couplings?

About Couplings

What are Hex Socket Head Cap Screws (cap bolts)?

CE-marked components which prevent foreign matter contamination are required 【Safety / precautionary measures】

Select the best screws for your needs

All you need to know about the roles and types of washers!

About Couplings

What are Hex Socket Head Cap Screws (cap bolts)?

CE-marked components which prevent foreign matter contamination are required 【Safety / precautionary measures】

Select the best screws for your needs

No. 8: Preventing Part Fall-out

Vol.1　Thinking about "Galling and Seizing"

Vol.2　Explaining the Vocabulary of Screws

Vol.3　Functional Screw Surface Treatments Are Not Just for Corrosion Resistance

Vol.4　What are washers used for?

Vol.5　Varieties of SUS Screws