Hexagon socket set screw with truncated cone ISO 4026 steel 45H, zinc-nickel-plated black (ZNBHL)

Name: Hexagon socket set screw with truncated cone ISO 4026 steel 45H, zinc-nickel-plated black (ZNBHL)
Brand: Würth
SKU: 51241412

ISO 4026 steel 45H zinc nickel black
SCR-FLPT-ISO4026-45H-HS2-(ZNBHL)-M4X12

Art.-no. 51241412

EAN 4046777558678

All versions

Specification

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

Notice

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.

Technical information


Thread type x nominal diameter (d₁)	M4
Length (l₁)	12 mm
Diameter of flat point (d₂)	2.5 mm
Internal drive (s₁)	HS2
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