Knobs

About Knobs

Knobs are machine elements which allow efficient tightening and loosening of screws.
The use of knobs increases work efficiency, since tools such as the wrenches and spanners used on screws are no longer required.
Efficient in places where screws are frequently handled, such as equipment changeover.　Learn More About Knobs

Selection Conditions

Select Thread SizeM8

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Part Name	Stainless Steel Hand Knob	Plastic Wing Knob	Plastic Wing Knob	Plastic Wing Knob	Plastic Wing Knob	Plastic Wing Knob	Plastic Wing Knob	Plastic Wing Knob	Plastic Wing Knob
Part Number	KMDFS-40-M8-HP	KUWM-50-M8	KUWM-64-M8	KUWMS-50-M8	KUWMS-64-M8	KUWF-50-M8	KUWF-64-M8	KUWFS-50-M8	KUWFS-64-M8
Feature	Ergonomic, easy to grip design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design
Shape	Polygonal	Bar	Bar	Bar	Bar	Bar	Bar	Bar	Bar
Type	Female Screw	Male Screw	Male Screw	Male Screw	Male Screw	Female Screw	Female Screw	Female Screw	Female Screw
Thread Part Material	Stainless Steel	Steel	Steel	Stainless Steel	Stainless Steel	Steel	Steel	Stainless Steel	Stainless Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	-	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KMDFS-40-M8-HP	KUWM-50-M8-20-BK KUWM-50-M8-20-BL KUWM-50-M8-20-OR KUWM-50-M8-20-SG KUWM-50-M8-20-YW KUWM-50-M8-30-BK KUWM-50-M8-30-BL KUWM-50-M8-30-OR KUWM-50-M8-30-SG KUWM-50-M8-30-YW KUWM-50-M8-40-BK KUWM-50-M8-40-BL KUWM-50-M8-40-OR KUWM-50-M8-40-SG KUWM-50-M8-40-YW	KUWM-64-M8-20-BK KUWM-64-M8-20-BL KUWM-64-M8-20-OR KUWM-64-M8-20-SG KUWM-64-M8-20-YW KUWM-64-M8-30-BK KUWM-64-M8-30-BL KUWM-64-M8-30-OR KUWM-64-M8-30-SG KUWM-64-M8-30-YW KUWM-64-M8-40-BK KUWM-64-M8-40-BL KUWM-64-M8-40-OR KUWM-64-M8-40-SG KUWM-64-M8-40-YW	KUWMS-50-M8-20-BK KUWMS-50-M8-20-BL KUWMS-50-M8-20-OR KUWMS-50-M8-20-SG KUWMS-50-M8-20-YW KUWMS-50-M8-30-BK KUWMS-50-M8-30-BL KUWMS-50-M8-30-OR KUWMS-50-M8-30-SG KUWMS-50-M8-30-YW KUWMS-50-M8-40-BK KUWMS-50-M8-40-BL KUWMS-50-M8-40-OR KUWMS-50-M8-40-SG KUWMS-50-M8-40-YW	KUWMS-64-M8-20-BK KUWMS-64-M8-20-BL KUWMS-64-M8-20-OR KUWMS-64-M8-20-SG KUWMS-64-M8-20-YW KUWMS-64-M8-30-BK KUWMS-64-M8-30-BL KUWMS-64-M8-30-OR KUWMS-64-M8-30-SG KUWMS-64-M8-30-YW KUWMS-64-M8-40-BK KUWMS-64-M8-40-BL KUWMS-64-M8-40-OR KUWMS-64-M8-40-SG KUWMS-64-M8-40-YW	KUWF-50-M8-BK KUWF-50-M8-BL KUWF-50-M8-OR KUWF-50-M8-SG KUWF-50-M8-YW	KUWF-64-M8-BK KUWF-64-M8-BL KUWF-64-M8-OR KUWF-64-M8-SG KUWF-64-M8-YW	KUWFS-50-M8-BK KUWFS-50-M8-BL KUWFS-50-M8-OR KUWFS-50-M8-SG KUWFS-50-M8-YW	KUWFS-64-M8-BK KUWFS-64-M8-BL KUWFS-64-M8-OR KUWFS-64-M8-SG KUWFS-64-M8-YW

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Part Name	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Miniature Knob	Plastic Star Knob
Part Number	KUDM-32-M8	KUDM-40-M8	KUDMS-32-M8	KUDMS-40-M8	KUDF-32-M8	KUDF-40-M8	KUDFS-32-M8	KUDFS-40-M8	KF-40-BK
Feature	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Universal Design	Nylon 6
Shape	Triangle	Triangle	Triangle	Triangle	Triangle	Triangle	Triangle	Triangle	Cross
Type	Male Screw	Male Screw	Male Screw	Male Screw	Female Screw	Female Screw	Female Screw	Female Screw	Male Screw
Thread Part Material	Steel	Steel	Stainless Steel	Stainless Steel	Steel	Steel	Stainless Steel	Stainless Steel	Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BKBLORSGYW	BK
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KUDM-32-M8-16-BK KUDM-32-M8-16-BL KUDM-32-M8-16-OR KUDM-32-M8-16-SG KUDM-32-M8-16-YW KUDM-32-M8-20-BK KUDM-32-M8-20-BL KUDM-32-M8-20-OR KUDM-32-M8-20-SG KUDM-32-M8-20-YW KUDM-32-M8-25-BK KUDM-32-M8-25-BL KUDM-32-M8-25-OR KUDM-32-M8-25-SG KUDM-32-M8-25-YW	KUDM-40-M8-16-BK KUDM-40-M8-16-BL KUDM-40-M8-16-OR KUDM-40-M8-16-SG KUDM-40-M8-16-YW KUDM-40-M8-20-BK KUDM-40-M8-20-BL KUDM-40-M8-20-OR KUDM-40-M8-20-SG KUDM-40-M8-20-YW KUDM-40-M8-25-BK KUDM-40-M8-25-BL KUDM-40-M8-25-OR KUDM-40-M8-25-SG KUDM-40-M8-25-YW KUDM-40-M8-30-BK KUDM-40-M8-30-BL KUDM-40-M8-30-OR KUDM-40-M8-30-SG KUDM-40-M8-30-YW KUDM-40-M8-40-BK KUDM-40-M8-40-BL KUDM-40-M8-40-OR KUDM-40-M8-40-SG KUDM-40-M8-40-YW KUDM-40-M8-50-BK KUDM-40-M8-50-BL KUDM-40-M8-50-OR KUDM-40-M8-50-SG KUDM-40-M8-50-YW	KUDMS-32-M8-16-BK KUDMS-32-M8-16-BL KUDMS-32-M8-16-OR KUDMS-32-M8-16-SG KUDMS-32-M8-16-YW KUDMS-32-M8-20-BK KUDMS-32-M8-20-BL KUDMS-32-M8-20-OR KUDMS-32-M8-20-SG KUDMS-32-M8-20-YW KUDMS-32-M8-25-BK KUDMS-32-M8-25-BL KUDMS-32-M8-25-OR KUDMS-32-M8-25-SG KUDMS-32-M8-25-YW	KUDMS-40-M8-16-BK KUDMS-40-M8-16-BL KUDMS-40-M8-16-OR KUDMS-40-M8-16-SG KUDMS-40-M8-16-YW KUDMS-40-M8-20-BK KUDMS-40-M8-20-BL KUDMS-40-M8-20-OR KUDMS-40-M8-20-SG KUDMS-40-M8-20-YW KUDMS-40-M8-25-BK KUDMS-40-M8-25-BL KUDMS-40-M8-25-OR KUDMS-40-M8-25-SG KUDMS-40-M8-25-YW KUDMS-40-M8-30-BK KUDMS-40-M8-30-BL KUDMS-40-M8-30-OR KUDMS-40-M8-30-SG KUDMS-40-M8-30-YW KUDMS-40-M8-40-BK KUDMS-40-M8-40-BL KUDMS-40-M8-40-OR KUDMS-40-M8-40-SG KUDMS-40-M8-40-YW KUDMS-40-M8-50-BK KUDMS-40-M8-50-BL KUDMS-40-M8-50-OR KUDMS-40-M8-50-SG KUDMS-40-M8-50-YW	KUDF-32-M8-BK KUDF-32-M8-BL KUDF-32-M8-OR KUDF-32-M8-SG KUDF-32-M8-YW	KUDF-40-M8-BK KUDF-40-M8-BL KUDF-40-M8-OR KUDF-40-M8-SG KUDF-40-M8-YW	KUDFS-32-M8-BK KUDFS-32-M8-BL KUDFS-32-M8-OR KUDFS-32-M8-SG KUDFS-32-M8-YW	KUDFS-40-M8-BK KUDFS-40-M8-BL KUDFS-40-M8-OR KUDFS-40-M8-SG KUDFS-40-M8-YW	KF-40-BK

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Part Name	Plastic Star Knob	Plastic Star Knob	Plastic Star Knob	Star Knob	Hexagon Knob	Eight Lobe Knob	Dimple Knob	Dimple Knob	Dimple Knob
Part Number	KF-40-RD	KGC-40-BK	KGC-40-RD	CKT-40	KKT-40	KP-30	KDM-25-M8	KDM-32-M8	KDMS-25-M8
Feature	Nylon 6	Nylon 6	Nylon 6	FC200	FC200	Nylon 6	Good Design Award	Good Design Award	Good Design Award
Shape	Cross	Cross	Cross	Cross	Polygonal	Polygonal	Dimple	Dimple	Dimple
Type	Male Screw	Female Screw	Female Screw	Female Screw	Female Screw	Male Screw	Male Screw	Male Screw	Male Screw
Thread Part Material	Steel	Brass	Brass	Cast iron	Cast iron	Steel	Steel	Steel	Stainless Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	RD	BK	RD	BK	CR	BK	BK	BK	BKWH
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KF-40-RD	KGC-40-BK	KGC-40-RD	CKT-40	KKT-40	KP-30	KDM-25-M8-16 KDM-25-M8-20 KDM-25-M8-25	KDM-32-M8-16 KDM-32-M8-20 KDM-32-M8-25 KDM-32-M8-40	KDMS-25-M8-16-BK KDMS-25-M8-16-WH KDMS-25-M8-20-BK KDMS-25-M8-20-WH KDMS-25-M8-25-BK KDMS-25-M8-25-WH

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Part Name	Dimple Knob	Captive Dimple Knob	Dimple Knob	Dimple Knob	Pillar Grip	Pillar Grip	Pillar Grip	Pillar Grip	Dimple Knob
Part Number	KDMS-32-M8	KDMS-32-M8-SC	KDF-32-M8	KDFS-32-M8	KDC-8-BK	KDC-8-RD	KDC-8B-BK	KDC-8B-RD	KRM-40-M8-16
Feature	Good Design Award	Captive	Good Design Award	Good Design Award	Old fashion	Old fashion	Old fashion	Old fashion	Good Design Award
Shape	Dimple	Dimple	Dimple	Dimple	Spherical	Spherical	Spherical	Spherical	Dimple
Type	Male Screw	Male Screw	Female Screw	Female Screw	Female Screw	Female Screw	Female Screw	Female Screw	Male Screw
Thread Part Material	Stainless Steel	Stainless Steel	Steel	Stainless Steel	Brass	Brass	Brass	Brass	Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	BKWH	BKWH	BK	BKWH	BK	RD	BK	RD	BK
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KDMS-32-M8-16-BK KDMS-32-M8-16-WH KDMS-32-M8-20-BK KDMS-32-M8-20-WH KDMS-32-M8-25-BK KDMS-32-M8-25-WH KDMS-32-M8-40-BK KDMS-32-M8-40-WH	KDMS-32-M8-20-SC-BK KDMS-32-M8-20-SC-WH KDMS-32-M8-25-SC-BK KDMS-32-M8-25-SC-WH	KDF-32-M8	KDFS-32-M8-BK KDFS-32-M8-WH	KDC-8-BK	KDC-8-RD	KDC-8B-BK	KDC-8B-RD	KRM-40-M8-16

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Part Name	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob
Part Number	KRM-40-M8-20	KRM-50-M8-16	KRM-50-M8-20	KRM-50-M8-25	KRM-50-M8-30	KRM-50-M8-50	KRMS-50-M8-16	KRMS-50-M8-20	KRMS-50-M8-25
Feature	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award
Shape	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple
Type	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw
Thread Part Material	Steel	Steel	Steel	Steel	Steel	Steel	Stainless Steel	Stainless Steel	Stainless Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	BK	BK	BK	BK	BK	BK	BK	BK	BK
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KRM-40-M8-20	KRM-50-M8-16	KRM-50-M8-20	KRM-50-M8-25	KRM-50-M8-30	KRM-50-M8-50	KRMS-50-M8-16	KRMS-50-M8-20	KRMS-50-M8-25

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Part Name	Dimple Knob	Dimple Knob	Dimple Knob	Dimple Knob	Long Dimple Knobs	Long Dimple Knobs	Long Dimple Knobs	Long Dimple Knobs	Long Dimple Knobs
Part Number	KRMS-50-M8-30	KRF-40-M8	KRF-50-M8	KRFS-50-M8	KLM-25-M8	KLM-32-M8	KLMS-32-M8	KLF-25-M8	KLF-32-M8
Feature	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award	Good Design Award
Shape	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple	Dimple
Type	Male Screw	Female Screw	Female Screw	Female Screw	Male Screw	Male Screw	Male Screw	Female Screw	Female Screw
Thread Part Material	Stainless Steel	Steel	Steel	Stainless Steel	Steel	Steel	Stainless Steel	Steel	Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	BK	BK	BK	BK	BK	BK	BK	BK	BK
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KRMS-50-M8-30	KRF-40-M8	KRF-50-M8	KRFS-50-M8	KLM-25-M8-20 KLM-25-M8-25	KLM-32-M8-16 KLM-32-M8-20 KLM-32-M8-25 KLM-32-M8-30 KLM-32-M8-40	KLMS-32-M8-16 KLMS-32-M8-20 KLMS-32-M8-25	KLF-25-M8	KLF-32-M8

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Part Name	Long Dimple Knobs	Knurled Knob	Knurled Knob	Knurled Knob - Stainless Steel SUS316L Equivalent	Knurled Knob	Knurled Knob	Knurled Knob	Knurled Knob	Knurled Knob
Part Number	KLFS-25-M8	KNM-30-M8	KNMS-30-M8	KNML-30-M8	KNF-30-M8	KNFS-30-M8	KUM-30-M8	KUMS-30-M8	KUF-30-M8
Feature	Good Design Award	Chrome Plating	SUS303	Equivalent to SUS316L	Chrome Plating	SUS303	Flat Type	Flat Type	Flat Type
Shape	Dimple	Knurled	Knurled	Knurled	Knurled	Knurled	Knurled	Knurled	Knurled
Type	Female Screw	Male Screw	Male Screw	Male Screw	Female Screw	Female Screw	Male Screw	Male Screw	Female Screw
Thread Part Material	Stainless Steel	Steel	Stainless Steel	Stainless Steel	Steel	Stainless Steel	Steel	Stainless Steel	Steel
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	BK	CR	-	-	CR	-	CR	-	CR
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KLFS-25-M8	KNM-30-M8-16 KNM-30-M8-20 KNM-30-M8-25 KNM-30-M8-30	KNMS-30-M8-16 KNMS-30-M8-20 KNMS-30-M8-25 KNMS-30-M8-30	KNML-30-M8-16 KNML-30-M8-20 KNML-30-M8-25 KNML-30-M8-30	KNF-30-M8	KNFS-30-M8	KUM-30-M8-16 KUM-30-M8-20 KUM-30-M8-25 KUM-30-M8-30	KUMS-30-M8-16 KUMS-30-M8-20 KUMS-30-M8-25 KUMS-30-M8-30	KUF-30-M8

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Part Name	Knurled Knob	Captive Knurled Knob	Captive Knurled Knob	Captive Knurled Knob - Stainless Steel SUS316L Equivalent	Captive Knurled Knob	Captive Knurled Knobs	Captive Wing Knob	Plastic Ball Knob	Plastic Ball Knob
Part Number	KUFS-30-M8	KNM-30-M8-SC	KNMS-30-M8-SC	KNML-30-M8-SC	KUM-30-M8-SC	KUMS-30-M8-SC	KWBS-31-M8-SC	PB-20-M8	PB-25-M8
Feature	Flat Type	Captive	Captive SUS304	Captive SUS316L Equivalent	Captive	Captive SUS304	-	Thermosetting resin	Thermosetting resin
Shape	Knurled	Knurled	Knurled	Knurled	Knurled	Knurled	Round	Spherical	Spherical
Type	Female Screw	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw	Male Screw	Female Screw	Female Screw
Thread Part Material	Stainless Steel	Steel	Stainless Steel	Stainless Steel	Steel	Stainless Steel	Stainless Steel	Plastic	Plastic
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8	M8
Surface	-	CR	-	-	CR	CR	-	BKRD	BKRD
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	KUFS-30-M8	KNM-30-M8-16-SC KNM-30-M8-20-SC KNM-30-M8-25-SC KNM-30-M8-30-SC	KNMS-30-M8-16-SC KNMS-30-M8-20-SC KNMS-30-M8-25-SC KNMS-30-M8-30-SC	KNML-30-M8-16-SC KNML-30-M8-20-SC KNML-30-M8-25-SC KNML-30-M8-30-SC	KUM-30-M8-16-SC KUM-30-M8-20-SC KUM-30-M8-25-SC KUM-30-M8-30-SC	KUMS-30-M8-16-SC KUMS-30-M8-20-SC KUMS-30-M8-25-SC KUMS-30-M8-30-SC	KWBS-31-M8-20-SC KWBS-31-M8-25-SC	PB-20-M8-BK PB-20-M8-RD	PB-25-M8-BK PB-25-M8-RD

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Part Name	Plastic Ball Knob	Plastic Ball Knob	Plastic Ball Knob	Plastic Ball Knob	Plastic Ball Knob	Gum Ball Knob	Conical Grip	Conical Grip
Part Number	PB-30-M8	PB-35-M8	PC-25-M8	PC-30-M8	PC-35-M8	KGB-25-M8	KEC-8-BK	KEC-8-RD
Feature	Thermosetting resin	Thermosetting resin	Thermosetting resin	Thermosetting resin	Thermosetting resin	Rubber	Fig-like	Fig-like
Shape	Spherical	Spherical	Spherical	Spherical	Spherical	Spherical	Spherical	Spherical
Type	Female Screw	Female Screw	Female Screw	Female Screw	Female Screw	Female Screw	Female Screw	Female Screw
Thread Part Material	Plastic	Plastic	Brass	Brass	Brass	Steel	Brass	Brass
Thread Size	M8	M8	M8	M8	M8	M8	M8	M8
Surface	BKRD	BKRD	BKRD	BKRD	BKRD	BK	BK	RD
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	PB-30-M8-BK PB-30-M8-RD	PB-35-M8-BK PB-35-M8-RD	PC-25-M8-BK PC-25-M8-RD	PC-30-M8-BK PC-30-M8-RD	PC-35-M8-BK PC-35-M8-RD	KGB-25-M8	KEC-8-BK	KEC-8-RD

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No. ９: Increasing Throughput

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

What makes our custom screws special

Customization

NBK SPECIAL SCREWS

Flexus【Muilti-Functional Machined Slotted Springs】

Designs and Examples of What NBK Can Create

No. 6: Thermal Cycling

No. 5: Solving common problems inside equipment

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

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

Higher torque and Lower price.

Plastic Screw Property

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

Comparison of the Dimensions of Low Profile Screws and Small Head Screws

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

What are Captive Screws? Introduction of the NBK Captive Series

Plastic Screw Property

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

Comparison of the Dimensions of Low Profile Screws and Small Head Screws

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

No. 6: Thermal Cycling

Vol.1　What is Seizing (Galling)?

Vol.7　Screw Tightening Control Methods

Vol.4　What are washers used for?

Vol.7　Screw Tightening Control Methods

Vol.6　Varieties of Screws "Beyond" SUS

Vol.1　What is Seizing (Galling)?

Vol.7　Screw Tightening Control Methods

Vol.1　What is Seizing (Galling)?

Vol.4　What are washers used for?

Vol.7　Screw Tightening Control Methods