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Bolts · ISO 4014 / ISO 4017

A2 Stainless Steel Hex Bolts

A2 Stainless Steel Hex Bolts reference image

A2 Stainless Steel Hex Bolts combine the dimensional form of ISO 4014 / ISO 4017 with the material properties of grade A2-70 (304): good general corrosion resistance, largely non-magnetic, service range approx. -200 °C to +400 °C. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.

Why Choose A2 Stainless Steel for Hex Bolts

The most common stainless grade for indoor and general outdoor fasteners. For hex bolts, this matters when good general corrosion resistance is the primary requirement.

Mechanical & Physical Properties

Grade designationA2-70 (304)
Magnetic responseLargely non-magnetic
Service temperatureapprox. -200 °C to +400 °C
Corrosion characteristicGood general corrosion resistance

Galvanic & Galling Considerations

Two important notes for stainless hex bolts: (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.

Comparable Grades

For Hex Bolts, the alternative stainless grade is A4 (316). A2 (304) suits general indoor and outdoor service; A4 (316) adds molybdenum for marine and chloride environments. Where higher strength matters more than corrosion, switch to plated alloy-steel class 8.8 or 10.9.

Sizes of Hex Bolts Available in A2 Stainless Steel

SizePitch coarse (mm)Width across flats s (mm)Width across corners e min (mm)Head height k nom (mm)Nominal diameter d (mm)Reference standardNotes
M10.252.52.710.71.0ISO 4017Fully threaded
M1.20.253.03.280.81.2ISO 4017Fully threaded
M1.40.33.03.280.91.4ISO 4017Fully threaded
M1.60.353.23.481.11.6ISO 4014/4017Fully threaded
M20.44.04.321.42.0ISO 4014/4017Fully threaded
M2.50.455.05.451.72.5ISO 4014/4017Fully threaded
M30.55.56.012.03.0ISO 4014/4017Fully threaded
M40.77.07.662.84.0ISO 4014/4017Fully threaded
M50.88.08.793.55.0ISO 4014/4017Fully threaded
M61.010.011.054.06.0ISO 4014/4017Fully threaded
M81.2513.014.385.38.0ISO 4014/4017Fully threaded
M101.516.017.776.410.0ISO 4014/4017Fully threaded
M121.7518.020.037.512.0ISO 4014/4017Partial / fully threaded
M142.021.023.368.814.0ISO 4014/4017Partial / fully threaded
M162.024.026.7510.016.0ISO 4014/4017Partial / fully threaded
M182.527.030.1411.518.0ISO 4014/4017Partial / fully threaded
M202.530.033.5312.520.0ISO 4014/4017Partial / fully threaded
M222.532.035.7214.022.0ISO 4014/4017Partial / fully threaded
M243.036.039.9815.024.0ISO 4014/4017Partial / fully threaded
M273.041.045.217.027.0ISO 4014/4017Partial / fully threaded
M303.546.050.8518.730.0ISO 4014/4017Partial / fully threaded
M333.550.055.3721.033.0ISO 4014/4017Partial / fully threaded
M364.055.060.7922.536.0ISO 4014/4017Partial / fully threaded
M394.060.066.4425.039.0ISO 4014/4017Partial / fully threaded
M424.565.071.326.042.0ISO 4014/4017Partial / fully threaded
M454.570.076.9528.045.0ISO 4014/4017Partial / fully threaded
M485.075.082.630.048.0ISO 4014/4017Partial / fully threaded
M525.080.088.2533.052.0ISO 4014/4017Partial / fully threaded
M565.585.093.5635.056.0ISO 4014Partial / fully threaded
M605.590.099.2138.060.0ISO 4014Partial / fully threaded

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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Adjust the parameters in the drawing above and click "Request this configuration" to send the exact specification straight to this form.

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Specification
Business Information

Dimensions & Specifications (ISO 4014 / ISO 4017)

SizePitch coarse (mm)Width across flats s (mm)Width across corners e min (mm)Head height k nom (mm)Nominal diameter d (mm)Reference standardNotes
M10.252.52.710.71.0ISO 4017Fully threaded
M1.20.253.03.280.81.2ISO 4017Fully threaded
M1.40.33.03.280.91.4ISO 4017Fully threaded
M1.60.353.23.481.11.6ISO 4014/4017Fully threaded
M20.44.04.321.42.0ISO 4014/4017Fully threaded
M2.50.455.05.451.72.5ISO 4014/4017Fully threaded
M30.55.56.012.03.0ISO 4014/4017Fully threaded
M40.77.07.662.84.0ISO 4014/4017Fully threaded
M50.88.08.793.55.0ISO 4014/4017Fully threaded
M61.010.011.054.06.0ISO 4014/4017Fully threaded
M81.2513.014.385.38.0ISO 4014/4017Fully threaded
M101.516.017.776.410.0ISO 4014/4017Fully threaded
M121.7518.020.037.512.0ISO 4014/4017Partial / fully threaded
M142.021.023.368.814.0ISO 4014/4017Partial / fully threaded
M162.024.026.7510.016.0ISO 4014/4017Partial / fully threaded
M182.527.030.1411.518.0ISO 4014/4017Partial / fully threaded
M202.530.033.5312.520.0ISO 4014/4017Partial / fully threaded
M222.532.035.7214.022.0ISO 4014/4017Partial / fully threaded
M243.036.039.9815.024.0ISO 4014/4017Partial / fully threaded
M273.041.045.217.027.0ISO 4014/4017Partial / fully threaded
M303.546.050.8518.730.0ISO 4014/4017Partial / fully threaded
M333.550.055.3721.033.0ISO 4014/4017Partial / fully threaded
M364.055.060.7922.536.0ISO 4014/4017Partial / fully threaded
M394.060.066.4425.039.0ISO 4014/4017Partial / fully threaded
M424.565.071.326.042.0ISO 4014/4017Partial / fully threaded
M454.570.076.9528.045.0ISO 4014/4017Partial / fully threaded
M485.075.082.630.048.0ISO 4014/4017Partial / fully threaded
M525.080.088.2533.052.0ISO 4014/4017Partial / fully threaded
M565.585.093.5635.056.0ISO 4014Partial / fully threaded
M605.590.099.2138.060.0ISO 4014Partial / fully threaded
M646.095.0104.8640.064.0ISO 4014Partial / fully threaded

Frequently Asked Questions

Are A2 Stainless Steel Hex Bolts magnetic?

A2 Stainless Steel Hex Bolts are largely non-magnetic.

What corrosion resistance do A2 Stainless Steel Hex Bolts offer?

A2 Stainless Steel Hex Bolts provide good general corrosion resistance with a service range of approx. -200 °C to +400 °C.

Should I choose A2 Stainless Steel or A4 (316) for Hex Bolts?

For Hex Bolts, A2 Stainless Steel suits general indoor and outdoor use; A4 (316) is preferred for marine, coastal and chemical environments. Choose by corrosion exposure first.

Can A2 Stainless Steel Hex Bolts gall during installation?

Yes — stainless on stainless is prone to thread galling under load, especially at smaller sizes. Use an anti-galling lubricant or wax thread compound, and slow the tightening rate where possible.

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.