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Hexagon socket set screw with truncated cone ISO 4026 steel 45H, zinc-nickel-plated black (ZNBHL)
- Standards: ISO 4026
- Material: Steel
- Surface: Zinc nickel black
- Hardness category: 45H
- Drive type: Hexagon socket
- Thread type: Metric thread
- Thread form: Standard metric thread
- Shape of tip: Truncated cone
- RoHS-compliant: Yes
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Variants
Fasteners with a zinc-plated chromium(VI)-free zinc-nickel coating (ZNBHL black or ZNSHL silver) are suitable for applications with a high risk of corrosion. The coating comprises a zinc-nickel alloy layer and a sealing coat (top coat with integrated lubricating particles).
Overview of advantages:
- Resistance of up to 720 hours against base metal corrosion in accordance with DIN EN ISO 9227 NSS
- Adjusted friction coefficient range from 0.09-0.14 μ due to top coat with integrated lubricating particles; thermal capacity up to 120°C
- Even coating distribution
- Functional and decorative
Hardness class 45H corresponds to a hardness of 450 HV
Steel set screws are intended for use under compressive stress only (see also DIN EN ISO 898-5). Typical uses include clamping in an adjusting ring or applying pressure to a counterpart. Steel set screws are therefore extremely hard in order to ensure torsional strength in the hexagon socket during tightening/loosening.
Tip:
A2/A4 stainless steel set screws are not specially hardened and may be used for tensile loads.
ISO 4026 replaces DIN 913 | There is some similarity | Nominal diameters for M1.4, M1.8, M14, M18, M22 are removed | Hardness classes for stainless steels introduced.
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