Loosening Prevention

These screws are designed to prevent loosening.
Bolts with nylon patches use friction to suppress reverse rotation of the screw.
Eccentric Lock Washers, used in combination with hex nuts, greatly prevent loosening.
Lock nuts have friction rings to prevent loosening.
Loosening-Prevention_1en

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Part Name	Hex Socket Head Cap Screws with Special Low Profile (Nylon Patch)	Hex Socket Head Cap Screws with Special Low Profile (Stainless Steel / Nylon Patch)	Hexalobular Socket Head Cap Screws with Extreme Low Profile (Nylon Patch)	Hexalobular Socket Head Cap Screws with Extreme Low Profile (Nylon Patch)	Socket Head Cap Screws with Small Head and Nylon Patch	Socket Head Cap Screws with Small Head and Nylon Patch	Socket Head Cap Screws with Ultra Low Small Head and Nylon Patch	Socket Head Cap Screws with Ultra Low Small Head and Nylon Patch	Hexalobular Socket Extra Low Profile Miniature Screw / Nylon Patch
Part Number	SSH-EL-ALK	SSHS-ALK	SET-NI-ALK	SETS-ALK	SNS-SD-EL-ALK	SNSS-SD-ALK	SSH-SD-EL-ALK	SSHS-SD-ALK	SNZCXS-ALK
Feature	Special Low Profile Space-Saving Nylon Patch	Special Low Profile Space-Saving Nylon Patch	Hexalobular Socket Extra Low Profile Space-Saving Nylon Patch	Hexalobular Socket Extra Low Profile Space-Saving Nylon Patch	Small Head Space-Saving Nylon Patch	Small Head Space-Saving Nylon Patch	Special Low Profile Small Head Space-Saving Nylon Patch	Special Low Profile Small Head Space-Saving Nylon Patch	Flat Head Machine Screw for Precision Instruments
Material	Steel	SUSXM7 (Equivalent to SUS304)	Steel	SUSXM7 (Equivalent to SUS304)	Steel	SUSXM7 (Equivalent to SUS304)	Steel	SUSXM7 (Equivalent to SUS304)	SUSXM7 (Equivalent to SUS304)
Surface Treatment	Electroless nickel plating	-	Nickel plating	-	Electroless nickel plating	-	Electroless nickel plating	-	-
Thread Size	M2 ～ M8	M2 ～ M8	M3 ～ M5	M2 ～ M6	M3 ～ M8	M2 ～ M8	M3 ～ M8	M2 ～ M8	M1.4 ～ M2.5
Operating Temperature (℃)	-	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SSH-M2.5-EL-ALK SSH-M2-EL-ALK SSH-M3-EL-ALK SSH-M4-EL-ALK SSH-M5-EL-ALK SSH-M6-EL-ALK SSH-M8-EL-ALK	SSHS-M2.5-ALK SSHS-M2-ALK SSHS-M3-ALK SSHS-M4-ALK SSHS-M5-ALK SSHS-M6-ALK SSHS-M8-ALK	SET-M3-NI-ALK SET-M4-NI-ALK SET-M5-NI-ALK	SETS-M2.6-ALK SETS-M2-ALK SETS-M3-ALK SETS-M4-ALK SETS-M5-ALK SETS-M6-ALK	SNS-M3-SD-EL-ALK SNS-M4-SD-EL-ALK SNS-M5-SD-EL-ALK SNS-M6-SD-EL-ALK SNS-M8-SD-EL-ALK	SNSS-M2.5-SD-ALK SNSS-M2-SD-ALK SNSS-M3-SD-ALK SNSS-M4-SD-ALK SNSS-M5-SD-ALK SNSS-M6-SD-ALK SNSS-M8-SD-ALK	SSH-M3-SD-EL-ALK SSH-M4-SD-EL-ALK SSH-M5-SD-EL-ALK SSH-M6-SD-EL-ALK SSH-M8-SD-EL-ALK	SSHS-M2.5-SD-ALK SSHS-M2-SD-ALK SSHS-M3-SD-ALK SSHS-M4-SD-ALK SSHS-M5-SD-ALK SSHS-M6-SD-ALK SSHS-M8-SD-ALK	SNZCXS-M1.4-ALK SNZCXS-M1.6-ALK SNZCXS-M2.5-ALK SNZCXS-M2-ALK

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Part Name	Pan Head Machine Screws for Precision Instruments (Miniature Screws with Nylon Patch)	Pan Head Machine Screws for Precision Instruments (Miniature Screws with Nylon Patch)	Hex Lock Nuts	Hex Lock Nuts - Titanium	Eccentric Lock Washer™	Ribbed Lock Washers	Ribbed Lock Washers	High Intensity Flat Washers
Part Number	SNZ-TBZ-ALK	SNZS-ALK	SWUS	SWUT	SWAS-EW	SWR	SWRS	SWF
Feature	Pan Head Machine Screw for Precision Instruments Nylon Patch	Pan Head Machine Screw for Precision Instruments Nylon Patch	Vibration Resistant	Lightweight Nonmagnetic Vibration Resistant	Vibration resistant treatment with commercial hexagon nut	Vibration Resistant	Vibration Resistant	Vibration Resistant High Strength
Material	Steel	SUSXM7 (Equivalent to SUS304)	SUS304	Grade 2 Titanium	SUS304	Steel	Stainless Steel	Steel
Surface Treatment	Black Trivalent Chromate Treatment	-	-	Special Chemical Polishing	-	Ferrosoferric Oxide Film (Black)	-	Ferrosoferric Oxide Film (Black)
Thread Size	M1.4 ～ M2.6	M1 ～ M2.6	M6 ～ M12	M3 ～ M10	M6 ～ M12	M2 ～ M20	M1.6 ～ M20	M6 ～ M16
Operating Temperature (℃)	-	-	-	-	-	-	-	-
CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD	CAD
Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications	Specifications
List	SNZ-M1.4-TBZ-ALK SNZ-M1.7-TBZ-ALK SNZ-M2.6-TBZ-ALK SNZ-M2-TBZ-ALK	SNZS-M1.4-ALK SNZS-M1.6-ALK SNZS-M1.7-ALK SNZS-M1-ALK SNZS-M2.5-ALK SNZS-M2.6-ALK SNZS-M2-ALK	SWUS-M10 SWUS-M12 SWUS-M6 SWUS-M8	SWUT-M10 SWUT-M3 SWUT-M4 SWUT-M5 SWUT-M6 SWUT-M8	SWAS-10-EW SWAS-12-EW SWAS-6-EW SWAS-8-EW	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	SWF-10 SWF-12 SWF-16 SWF-6 SWF-8

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Vol.7　Screw Tightening Control Methods