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Bolts · DIN 6336 / GN 313

Grade 8.8 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042)

Grade 8.8 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) reference image

Grade 8.8 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) pairs the standard DIN 6336 / GN 313 with a Grade 8.8 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 8.8 Steel for Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042)

The workhorse medium-carbon alloy grade for structural joints. For clamping handle screw (short) — din 6336 / gn 313 (series 042), this matters when requires plating (zinc) for corrosion protection is the primary requirement.

Mechanical & Physical Properties

Grade designationclass 8.8
Magnetic responseMagnetic
Service temperatureup to approx. +300 °C
Corrosion characteristicRequires plating (zinc) for corrosion 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.

Comparable Grades

For Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042), class 10.9 or 12.9 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.

Sizes of Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) Available in Grade 8.8 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

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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

What corrosion resistance do Grade 8.8 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) offer?

Grade 8.8 Steel Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042) provide requires plating (zinc) for corrosion protection with a service range of up to approx. +300 °C.

When should I move from class 8.8 to class 10.9 / 12.9 for Clamping Handle Screw (Short) — DIN 6336 / GN 313 (Series 042)?

Step up to class 10.9 / 12.9 when the joint preload approaches the proof load of the current class. The higher class adds preload at the same diameter, often saving size and weight.

Is Grade 8.8 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.

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.