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Security screws / Tamper Resistant Screws

Screws which cannot be installed or removed easily with standard tools to prevent theft and tampering.
Image Hexalobular Socket (with Pin) Button Head Cap Screws Captive Button Head Cap Bolts with Hexalobular Socket (with Pin) Socket Head Cap Screws with Hexalobular Socket and Pin Button Head Cap Screws with Five-Lobe Holes (with Pin) Button Head Cap Screws with Three-Lobe Holes (with Pin) Triangular Socket Button Head Cap Screws Hexalobular Socket Pan Head Machine Screws (with Pin) with Washer Hexalobular Socket (with Pin) Pan Head Machine Screws with Washer with Nylon Patch Cross Recessed (with Pin) Pan Head Machine Screws
Part Name Hexalobular Socket (with Pin) Button Head Cap Screws Captive Button Head Cap Bolts with Hexalobular Socket (with Pin) Socket Head Cap Screws with Hexalobular Socket and Pin Button Head Cap Screws with Five-Lobe Holes (with Pin) Button Head Cap Screws with Three-Lobe Holes (with Pin) Triangular Socket Button Head Cap Screws Hexalobular Socket Pan Head Machine Screws (with Pin) with Washer Hexalobular Socket (with Pin) Pan Head Machine Screws with Washer with Nylon Patch Cross Recessed (with Pin) Pan Head Machine Screws
Part Number SRBS SSC-SRBS SRHS SRGS SRSAS SRTRS SRTSQ-TZB SRTSQ-TZB-ALK SRP-TZB
Feature Hexalobular Socket
with Pin		 Hexalobular Socket
With Pin
Captive /
Loss Prevention		 Hex Socket
with Pin		 Five-Lobe Holes
(with Pin)		 Three-Lobe Holes
(with Pin)		 Triangular Socket Hexalobular Socket
With Pin
Captive Washer
I=3		 Hexalobular Socket
With Pin
Captive Washer
I=3		 Cross Recesses
With Pin
Material Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 Steel Steel Steel
Surface Treatment - - - - - - Trivalent chromate treatment Trivalent chromate treatment Trivalent chromate treatment
Thread Size M3 ～ M8 M3 ～ M8 M3 ～ M6 M3 ～ M8 M3 ～ M8 M3 ～ M6 M2 ～ M4 M2 ～ M4 M3 ～ M6
Operating Temperature (℃) - - - - - - - - -
CAD CAD CAD CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SRBS-M3 SRBS-M4 SRBS-M5 SRBS-M6 SRBS-M8 SSC-SRBS-M3 SSC-SRBS-M4 SSC-SRBS-M5 SSC-SRBS-M6 SSC-SRBS-M8 SRHS-M3 SRHS-M4 SRHS-M5 SRHS-M6 SRGS-M3 SRGS-M4 SRGS-M5 SRGS-M6 SRGS-M8 SRSAS-M3 SRSAS-M4 SRSAS-M5 SRSAS-M6 SRSAS-M8 SRTRS-M3 SRTRS-M4 SRTRS-M5 SRTRS-M6 SRTSQ-M2.6-TZB SRTSQ-M2-TZB SRTSQ-M3-TZB SRTSQ-M4-TZB SRTSQ-M2.6-TZB-ALK SRTSQ-M2-TZB-ALK SRTSQ-M3-TZB-ALK SRTSQ-M4-TZB-ALK SRP-M3-TZB SRP-M4-TZB SRP-M5-TZB SRP-M6-TZB
Image Cross Recessed (with Pin) Pan Head Machine Screws with Nylon Patch One Side Pan Head Machine Screws Triwing Pan Head Machine Screws Two-Hole Pan Head Machine Screws Tamper Resistant Cap Screws with Ultra Low Profile Ultra Low Profile Tamper-Resistant Screws with Nylon Patch Flat Head Screws with Hexalobular Socket and Pin Flat Head Bolts with Hexalobular Socket (with Pin) Rosette Washer Set Hex Socket Flat Head Bolts (with Pin)
Part Name Cross Recessed (with Pin) Pan Head Machine Screws with Nylon Patch One Side Pan Head Machine Screws Triwing Pan Head Machine Screws Two-Hole Pan Head Machine Screws Tamper Resistant Cap Screws with Ultra Low Profile Ultra Low Profile Tamper-Resistant Screws with Nylon Patch Flat Head Screws with Hexalobular Socket and Pin Flat Head Bolts with Hexalobular Socket (with Pin) Rosette Washer Set Hex Socket Flat Head Bolts (with Pin)
Part Number SRP-TZB-ALK SROS SRWS SRTS SRSHS SRSHS-ALK SRFXS SRFXS-SET SRHFS
Feature Cross Recesses
With Pin
Nylon Patch		 Tightened
withPhillips Screwdriver		 Triwing Socket Two-Hole Space-saving
Ultra Low Profile
Tamper Resistant		 Ultra Low Head Height
Tamper-Resistance Screws
Nylon Patch		 Hexalobular Socket
with Pin		 Hexalobular Socket with Pin Hex Socket
With Pin
Material Steel Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 SUSXM7 (Equivalent to SUS304) SUSXM7 (Equivalent to SUS304) Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304
Surface Treatment Trivalent chromate treatment - - - - - - - -
Thread Size M3 ～ M6 M3 ～ M5 M3 ～ M5 M3 ～ M5 M2 ～ M4 M2 ～ M4 M3 ～ M6 M3 ～ M6 M3 ～ M10
Operating Temperature (℃) - - - - - - - - -
CAD CAD CAD CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SRP-M3-TZB-ALK SRP-M4-TZB-ALK SRP-M5-TZB-ALK SRP-M6-TZB-ALK SROS-M3 SROS-M4 SROS-M5 SRWS-M3 SRWS-M4 SRWS-M5 SRTS-M3 SRTS-M4 SRTS-M5 SRSHS-M2 SRSHS-M2.5 SRSHS-M3 SRSHS-M4 SRSHS-M2.5-ALK SRSHS-M2-ALK SRSHS-M3-ALK SRSHS-M4-ALK SRFXS-M3 SRFXS-M4 SRFXS-M5 SRFXS-M6 SRFXS-M3-SET SRFXS-M4-SET SRFXS-M5-SET SRFXS-M6-SET SRHFS-M10 SRHFS-M3 SRHFS-M4 SRHFS-M5 SRHFS-M6 SRHFS-M8
Image Five-Lobe Socket with Pin Flat Head Screws Five-Lobe Socket with Pin Flat Head Screws Rosette Washer Set Five-Lobe Socket with Pin Flat Head Screws with Nylon Patch Five-Lobe Socket with Pin Flat Head Screws with Nylon Patch Rosette Washer Set Triwing Flat Head Machine Screws Two-Hole Flat Head Machine Screws Two-Hole Flat Head Machine Screws and Rosette Washer Set Two-Hole Flat Head Machine Screws with Nylon Patch Two-Hole Flat Head Machine Screws with Nylon Patch Rosette Washer Set
Part Name Five-Lobe Socket with Pin Flat Head Screws Five-Lobe Socket with Pin Flat Head Screws Rosette Washer Set Five-Lobe Socket with Pin Flat Head Screws with Nylon Patch Five-Lobe Socket with Pin Flat Head Screws with Nylon Patch Rosette Washer Set Triwing Flat Head Machine Screws Two-Hole Flat Head Machine Screws Two-Hole Flat Head Machine Screws and Rosette Washer Set Two-Hole Flat Head Machine Screws with Nylon Patch Two-Hole Flat Head Machine Screws with Nylon Patch Rosette Washer Set
Part Number SRGFS SRGFS-SET SRGFS-ALK SRGFS-ALK-SET SRWFS SRTFS SRTFS-SET SRTFS-ALK SRTFS-ALK-SET
Feature Five-Lobe
With Pin		 Five-Lobe
With Pin		 Five-Lobe
With Pin
Nylon Patch		 Five-Lobe
With Pin
Nylon Patch		 Triwing Two-Hole Two-Hole Two-Hole
Nylon Patch		 Two-Hole
Nylon Patch
Material SUSXM7 (Equivalent to SUS304) SUSXM7 (Equivalent to SUS304) SUSXM7 (Equivalent to SUS304) SUSXM7 (Equivalent to SUS304) Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304 Equivalent to SUS304
Surface Treatment - - - - - - - - -
Thread Size M4 ～ M6 M4 ～ M6 M4 ～ M6 M4 ～ M6 M2 ～ M8 M3 ～ M6 M3 ～ M6 M3 ～ M6 M3 ～ M6
Operating Temperature (℃) - - - - - - - - -
CAD CAD CAD CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SRGFS-M4 SRGFS-M5 SRGFS-M6 SRGFS-M4-SET SRGFS-M5-SET SRGFS-M6-SET SRGFS-M4-ALK SRGFS-M5-ALK SRGFS-M6-ALK SRGFS-M4-ALK-SET SRGFS-M5-ALK-SET SRGFS-M6-ALK-SET SRWFS-M2 SRWFS-M3 SRWFS-M4 SRWFS-M5 SRWFS-M6 SRWFS-M8 SRTFS-M3 SRTFS-M4 SRTFS-M5 SRTFS-M6 SRTFS-M3-SET SRTFS-M4-SET SRTFS-M5-SET SRTFS-M6-SET SRTFS-M3-ALK SRTFS-M4-ALK SRTFS-M5-ALK SRTFS-M6-ALK SRTFS-M3-ALK-SET SRTFS-M4-ALK-SET SRTFS-M5-ALK-SET SRTFS-M6-ALK-SET
Image Hex Socket Set Screws (with Pin) Hex Socket Set Screws (with Pin) with Nylon Patch System 5 Screws System 5 Screws with Nylon Patch System 6 Screws System 6 Screws with Nylon Patch Theft Prevention Nuts Protective Cap for Hex Socket Wrench for Hexalobular Socket (with Pin) Tamper-Resistant Screws
Part Name Hex Socket Set Screws (with Pin) Hex Socket Set Screws (with Pin) with Nylon Patch System 5 Screws System 5 Screws with Nylon Patch System 6 Screws System 6 Screws with Nylon Patch Theft Prevention Nuts Protective Cap for Hex Socket Wrench for Hexalobular Socket (with Pin) Tamper-Resistant Screws
Part Number SRHSET SRHSET-ALK SRS5S SRS5S-ALK SRS6A SRS6A-ALK SHNRS SRRIP SRX
Feature Hex Socket Set Screws
With Pin		 Hex Socket Set Screws
With Pin		 System 5 Shape System 5 Shape System 6 Shape System 6 Shape Anti-theft Nut For Hex Socket Head Cap Screws
Tamper Resistance		 For Hexalobular Socket with Pin
Material Steel Steel SUSXM7 (Equivalent to SUS304) SUSXM7 (Equivalent to SUS304) A5056 A5056 SUS304 - -
Surface Treatment Ferrosoferric Oxide Film (Black) Ferrosoferric Oxide Film (Black) - - - - - - -
Thread Size M5 ～ M8 M5 ～ M8 M2 ～ M2.6 M2 ～ M2.6 M3 ～ M5 M3 ～ M5 M6 ～ M16 - -
Operating Temperature (℃) - - - - - - - - -
CAD CAD CAD CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SRHSET-M5 SRHSET-M6 SRHSET-M8 SRHSET-M5-ALK SRHSET-M6-ALK SRHSET-M8-ALK SRS5S-M2 SRS5S-M2.5 SRS5S-M2.6 SRS5S-M2.5-ALK SRS5S-M2.6-ALK SRS5S-M2-ALK SRS6A-M3 SRS6A-M4 SRS6A-M5 SRS6A-M3-ALK SRS6A-M4-ALK SRS6A-M5-ALK SHNRS-M10 SHNRS-M10-P1.25 SHNRS-M12 SHNRS-M16 SHNRS-M6 SHNRS-M8 SRRIP-10 SRRIP-14 SRRIP-4 SRRIP-5 SRRIP-6 SRRIP-8 SRX-10 SRX-20 SRX-25 SRX-30 SRX-40
Image Bits for Hexalobular Socket (with Pin) Tamper-Resistant Screws Hex Socket Wrench (with Pin) for Tamper Resistant Screws Hex Socket Head Cap Bits (with Pin) for Tamper Resistant Screws Bits for Cross Recessed (with Pin) Tamper-Resistant Screws One Side Screwdriver for Tamper Resistant Screws Five-Lobe Socket Bits (with Pin) for Tamper Resistant Screws Tri-wing Bits for Tamper Resistant Screws Three-Lobe Socket Bits (with Pin) for Tamper Resistant Screws Triangle Socket Bits for Tamper Resistant Screws
Part Name Bits for Hexalobular Socket (with Pin) Tamper-Resistant Screws Hex Socket Wrench (with Pin) for Tamper Resistant Screws Hex Socket Head Cap Bits (with Pin) for Tamper Resistant Screws Bits for Cross Recessed (with Pin) Tamper-Resistant Screws One Side Screwdriver for Tamper Resistant Screws Five-Lobe Socket Bits (with Pin) for Tamper Resistant Screws Tri-wing Bits for Tamper Resistant Screws Three-Lobe Socket Bits (with Pin) for Tamper Resistant Screws Triangle Socket Bits for Tamper Resistant Screws
Part Number SRXB SRH SRHB SRCB SROT SRGB SRWB SRSAB SRTRB
Feature For Hexalobular Socket with Pin For Hex Socket with Pin For Hex Socket with Pin For Cross Recesses with Pin For One Side Shapes Screwdriver For Five-Lobe Socket with Pin For Tri-wing For Three-Lobe Socket with Pin For Triangle Socket
Material - - - - - - - - -
Surface Treatment - - - - - - - - -
Thread Size - - - - - - - - -
Operating Temperature (℃) - - - - - - - - -
CAD CAD CAD CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SRXB-10 SRXB-20 SRXB-25 SRXB-30 SRXB-40 SRXB-6 SRXB-8 SRH-2 SRH-2.5 SRH-3 SRH-4 SRH-5 SRH-6 SRHB-2 SRHB-2.5 SRHB-3 SRHB-4 SRHB-5 SRHB-6 SRCB-2 SRCB-3 SROT-410 SROT-510 SRGB-3 SRGB-4 SRGB-56 SRGB-8 SRWB-1 SRWB-2 SRWB-4 SRWB-5 SRWB-6 SRWB-7 SRSAB-3 SRSAB-4 SRSAB-56 SRSAB-8 SRTRB-3 SRTRB-4 SRTRB-5 SRTRB-6
Image Two-Hole Driver Bits for Tamper Resistant Screws Bits for Tamper Resistant Special Low Profile Cap Screws System 5 Driver Bits for Tamper Resistant Screws System 6 Driver Bits for Tamper Resistant Screws Sockets for Theft Prevention Nuts Magnetic Screwdriver for Tamper Resistance Screws
Part Name Two-Hole Driver Bits for Tamper Resistant Screws Bits for Tamper Resistant Special Low Profile Cap Screws System 5 Driver Bits for Tamper Resistant Screws System 6 Driver Bits for Tamper Resistant Screws Sockets for Theft Prevention Nuts Magnetic Screwdriver for Tamper Resistance Screws
Part Number SRTB SRSHB SKRS5K SKRS6K SKW SRD
Feature For Two-Hole For Tamper Resistant Special Low Profile Cap Screws For System 5 Screws For System 6 Screws For Theft Prevention Nuts In Combination with Bits
Material - - - - - -
Surface Treatment - - - - - -
Thread Size - - - - - -
Operating Temperature (℃) - - - - - -
CAD CAD CAD CAD CAD CAD CAD
Specifications Specifications Specifications Specifications Specifications Specifications Specifications
List SRTB-10 SRTB-14 SRTB-4 SRTB-8 SRSHB-0 SRSHB-1 SRSHB-2 SRSHB-3 SKRS5K-2 SKRS5K-3 SKRS6K-3 SKRS6K-4 SKRS6K-5 SKW-10 SKW-12 SKW-16 SKW-6 SKW-8 SRD-6.35

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No. 2: Vacuum environments

No. 2: Vacuum environments

Vacuum technology is often used in semiconductor manufacturing equipment. A vacuum is not required for all equipment. A vacuum would mainly be required for equipment that uses plasma or an electron beam. In Part 2, we introduce some NBK products that are ideal for use in these vacuum environments!

Description of Tamper Resistant Screws for the Engineers

Description of Tamper Resistant Screws for the Engineers

This is the page on tamper-resistant screws in "Description of Special Screws for Designers." We introduce here what tamper-resistant screws are, the advantages of their use, various usage examples, and their types and characteristics.

Galling and Seizing

Galling and Seizing

This is a phenomenon that occurs while tightening, where the surface of the screw thread melts or welds due to frictional heat and the screw stops moving. To resolve galling, NBK's special surface treatment screws, such as those with fluorine coating, are recommended.

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

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

NBK offers a wide-ranging lineup of small-diameter screws in various shapes and materials.
Various head diameters and heights are available for the same screw diameters, contributing to saving space.

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