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Special Screws

Plastic and Rubber

Plastic and Rubber

This page describes "Plastics and Rubbers" such as ABS, FRP, polycarbonate, polypropylene, silicone rubber and butyl rubber.

Surface Treatment

Surface Treatment

This page describes "Surface Treatments" such as thermal spraying, induction hardening, nitriding, electroplating, chemical conversion treatment and anodic oxidation.

Aluminum Alloy

Aluminum Alloy

This page describes "Aluminum Alloys" such as A5052, A2017, A6063 and A7075.

Stainless Steel

Stainless Steel

This page describes "Stainless Steels" such as SUS304, SUS316, SUS430, SUS316L, SUS303, SUS440C and SUS403.

Comparison Table of Material

Comparison Table of Material

This page describes "Comparison table of material".

Property of Screws with Special Surface Treatment

Property of Screws with Special Surface Treatment

This page describes "Properties of Screws with Special Surface Treatment" such as fluorine coating and molybdenum disulfide coating.

Property of High Performance Stainless Steel Screws

Property of High Performance Stainless Steel Screws

This page describes "Properties of High Performance Stainless Steel Screws" such as SUS316L and SUS310S, which are effective for magnetic detection, high strength and heat resistance.

IPX7 Waterproof Evaluation of Sealing Washers

IPX7 Waterproof Evaluation of Sealing Washers

This is the page for IPX7 waterproof evaluation of sealing washers.

Eccentric Lock Washers™ Comparison Test: Anti-Loosening Performance

Eccentric Lock Washers™ Comparison Test: Anti-Loosening Performance

We provide anti-loosening test results for NBK’s anti-loosening washer, “Eccentric Lock Washer”.

Anti-removal measures for interlock devices

Anti-removal measures for interlock devices

According to the ISO 14119 revision (2013), measures are now required to prevent the dismantling, removal, or disabling of interlock devices. Among these measures, the use of a special screw which can only turn in one direction is recommended.

Parallel Pipe Threads

Parallel Pipe Threads

This page describes JIS B 0202 "Parallel pipe threads".

Geometrical Tolerancing

Geometrical Tolerancing

This page describes JIS B 0021 "Geometrical tolerancing−Tolerancing of form, orientation, location and run-out".

Hexagon Socket Head Cap Screws <span class="small">Excerpts from JIS B 1176:2015</span> <BR>

Hexagon Socket Head Cap Screws Excerpts from JIS B 1176:2015

This page describes JIS B 1176 "Hexagon socket head cap screws".

Plain Washers

Plain Washers

This page describes JIS B 1256 "Plain washers".

Second Moment of Area, Section Modulus, and Turning Radius of Cross Section

Second Moment of Area, Section Modulus, and Turning Radius of Cross Section

This page describes "Cross Section's Area Second Moment, Section Modulus, Rotation Radius".

Spring Lock Washers

Spring Lock Washers

This page describes JIS B 1251 "Spring lock washers".