
Vacuum-Vented Screws
Vented (drilled) socket-head cap screws that release trapped air and gases during pump-down to prevent virtual leaks in vacuum and cleanroom systems.
Nuts, Bolts and Knowledge
Precision special screws for vacuum, cleanroom, non-magnetic and high-temperature applications. Available in stainless steel, titanium and high-performance alloys, with full specifications on nbk1560.com.


Vented (drilled) socket-head cap screws that release trapped air and gases during pump-down to prevent virtual leaks in vacuum and cleanroom systems.

Grade 2 and Grade 5 titanium socket-head cap and machine screws: lightweight, non-magnetic and chemically resistant for medical, aerospace and semiconductor use.

Low-permeability fasteners in titanium, SUS316L HiMo, tantalum, phosphor bronze and brass for MRI, cryogenic, semiconductor and precision magnetic instruments.

Fasteners for service far beyond 200 °C: SUS316L, molybdenum, ceramic, Vespel, Hastelloy and Inconel screws for furnaces, plasma and high-temperature process equipment.

Screws that protect the thread and head against aggressive chemicals: SUS316L HiMo, Inconel, Hastelloy C-276 and titanium for process, plating and semiconductor equipment.

High-strength fasteners in Grade 5 titanium, SUS316L, chrome-molybdenum steel, aluminium and RENY plastic that let designers downsize while keeping fastening strength.

Captive screws stay permanently attached to the component, preventing loss during operation and maintenance of covers, panels and access points.

Tamper-proof security bolts with a pin-in-Torx socket that cannot be fitted or removed with standard tools, for machines and equipment needing theft protection or safety.
Tell us your application, material and environment, and we will match the right screw.