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Bolts · DIN 6336 / GN 313

Grade 12.9 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042)

Grade 12.9 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) pairs the standard DIN 6336 / GN 313 with a Grade 12.9 Steel base material. The sections below cover why engineers select this grade for clamping handle screw (short) — din 6336 / gn 313 (series 042), its corrosion and temperature behavior, and the sizes available.

Why Choose Grade 12.9 Steel for Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042)

The highest common strength class, for high-load machine assembly. For clamping handle screw (short) — din 6336 / gn 313 (series 042), this matters when requires plating or black-oxide protection is the primary requirement.

Mechanical & Physical Properties

Grade designationclass 12.9
Magnetic responseMagnetic
Service temperatureup to approx. +300 °C
Corrosion characteristicRequires plating or black-oxide protection

Corrosion Behavior in Service

Carbon and alloy steel clamping handle screw (short) — din 6336 / gn 313 (series 042) require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.

Galvanic & Galling Considerations

For clamping handle screw (short) — din 6336 / gn 313 (series 042) in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.

Sizes of Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) Available in Grade 12.9 Steel

Thread sizePitch (mm)Length L (mm)Handle length (mm)Knob diameter (mm)Reference standard
M50.8204528DIN 6336 / GN 313
M61.0255032DIN 6336 / GN 313
M81.25306040DIN 6336 / GN 313
M101.5407045DIN 6336 / GN 313
M121.75508050DIN 6336 / GN 313

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

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Specification
Business Information

Dimensions & Specifications (DIN 6336 / GN 313)

Thread sizePitch (mm)Length L (mm)Handle length (mm)Knob diameter (mm)Reference standard
M50.8204528DIN 6336 / GN 313
M61.0255032DIN 6336 / GN 313
M81.25306040DIN 6336 / GN 313
M101.5407045DIN 6336 / GN 313
M121.75508050DIN 6336 / GN 313

Frequently Asked Questions

Is Grade 12.9 Steel prone to hydrogen embrittlement?

Class 10.9 and above can be susceptible to hydrogen embrittlement when electroplated. Specify post-plating baking, or use mechanical-zinc / zinc-flake finishes which avoid the cathodic plating step.

Which finish is best for outdoor Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042)?

For outdoor service in steel, hot-dip galvanizing gives the longest life; zinc-flake (Geomet/Delta-Tone family) gives a thinner film with excellent salt-spray performance; standard zinc plating is the lowest-cost option for general indoor / shielded outdoor use.

What's the service temperature limit for Grade 12.9 Steel?

The practical service range is up to approx. +300 °C.

Can Grade 12.9 Steel replace stainless steel structurally?

No — stainless A2/A4 cannot match class 10.9 / 12.9 strength. Stainless is selected for corrosion, not raw strength.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.