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Stainless Hex Nuts (DIN 934 / ISO 4032) - A2-70 / A4-80 - SS304 / SS316 - hex body with internal thread; primary product view

Stainless Hex Nuts

StandardDIN 934 · ISO 4032 · ASME B18.2.2
MaterialSS304 / SS316
Strength GradeA2-70 / A4-80
Size RangeM3-M36
Surface TreatmentPassivated
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01

Product Description

Product Description & Key Specifications

DIN 934 / ISO 4032 stainless hex nuts are supplied in SS304 / SS316 for corrosion-resistant bolted assemblies using stainless hex bolts, threaded rods and washer sets. Common supply range is M3-M36 with passivated finish, metric coarse thread and project documentation such as CoC, material certificate or dimensional report on request.

Stainless hex nuts are used as the standard mating component for DIN 931 / ISO 4014 partial-thread bolts, DIN 933 / ISO 4017 full-thread bolts and stainless threaded rods. Correct nut selection should confirm thread size, material pairing, strength requirement, surface condition and whether flat washers or lock washers are required by the joint design.

SS304 / A2 is suitable for general indoor and outdoor stainless assemblies, while SS316 / A4 is preferred for marine, coastal, washdown and chloride-exposed environments. Passivation helps improve the stainless surface condition after forming and tapping, especially when nuts are supplied as bolt-nut-washer sets for export projects.

Product typeStainless hex nuts
StandardsDIN 934 / ISO 4032 / ASME B18.2.2 reference
MaterialSS304 / SS316
Strength gradeA2 / A4 stainless, matched to A2-70 / A4-80 bolt assemblies when specified
Size rangeM3-M36, with thread pitch confirmed by order
Common modelsM6, M8, M10, M12, M16, M20, M24 stainless hex nuts
Thread typeMetric coarse thread, special pitch by drawing
Surface finishPassivated stainless surface
Supply formNuts only or matched bolt-nut-washer sets
DocumentationCoC, material certificate and dimensional report on request
Dimensions & SpecificationsDIN 934 / ISO 4032

Technical Drawing

DIN 934 technical drawing

Dimensional Table

ParameterM1M1.2M1.4M1.6M2M2.5M3M3.5M4M5M6M7M8M10M12M14M16
P0.250.250.30.350.40.450.50.60.70.8111|1.251|1.25|1.51.25|1.5|1.751.5|21.5|2
e/min2.713.283.283.414.325.456.016.587.668.7911.0512.1214.3818.921.124.4926.75
k/max0.811.21.31.622.42.83.2455.56.58101113
k/min0.550.750.951.051.351.752.152.552.93.74.75.26.147.649.6410.312.3
s/max2.5333.2455.567810111317192224
s/min2.42.92.93.023.824.825.325.826.787.789.7810.7312.7316.7318.6721.6723.67

Engineering references

Technical resources

Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.
Dimensions and drawingCustom & Non-Standard DIN 934 Hexagon Nuts (Style 1)Open drawing →Standard cross-referenceDIN 934 vs ISO 4032: equivalents and replacement guideOpen cross-reference →
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Selection

Selection Advantages by Application

Solar PV Mounting Systems

DIN 934 / ISO 4032 stainless nuts are commonly supplied with M8, M10 and M12 stainless bolts for rails, clamps and bracket connections. SS304 / A2 suits general outdoor PV projects; SS316 / A4 is preferred for coastal solar farms.

Renewable energy fasteners

Marine & Coastal Hardware

SS316 / A4 hex nuts are preferred for salt spray, wet outdoor service and chloride exposure. Typical marine RFQs include M10, M12 and M16 stainless hex nuts matched with A4 bolts and flat washers.

Marine fasteners

Construction & Outdoor Structures

M12, M16, M20 and M24 stainless hex nuts are common for exposed frames, railings, facade brackets and outdoor equipment structures. Confirm washer choice and locking method for service vibration.

Construction fasteners

Railway & Rolling Stock Equipment

M6, M8, M10 and M12 stainless hex nuts support covers, access panels, brackets and non-primary equipment joints where corrosion resistance and maintenance access matter.

Railway fasteners

Water Treatment / Hygienic Equipment

SS316 / A4 passivated hex nuts are suitable for pumps, pipe supports, stainless skids and washdown equipment. Confirm crevice risk, cleanability and certificate requirements before ordering.

Hygienic equipment fasteners
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Assembly

Recommended Matching Products

Stainless Hex Head Bolts (Full Thread) (DIN 933 / ISO 4017) - A2-70 / A4-80 - SS304 / SS316 - continuous thread along the fastener body; primary product view
Stainless Hex Head Bolts (Full Thread)Standard mating bolts for DIN 934 / ISO 4032 stainless nut assemblies.
Stainless Hex Head Bolts (Partial Thread) (DIN 931 / ISO 4014) - A2-70 / A4-80 - SS304 / SS316 - plain shank with a partially threaded end; primary product view
Stainless Hex Head Bolts (Partial Thread)Bolt option when a defined unthreaded grip length is required.
Stainless Flat Washers (ISO 7089 / DIN 125) - SS304 / SS316 - washer profile with central bore; primary product view
Stainless Flat WashersLoad distribution and surface protection under nuts or bolt heads.
Stainless Spring Washers (DIN 127 / ISO 7980) - SS304 / SS316 - split helical spring washer profile; primary product view
Stainless Spring WashersLight anti-loosening support for non-critical stainless assemblies.
Stainless Nylon Insert Lock Nuts (DIN 985 / DIN 982) - A2-70 / A4-80 - SS304 / SS316 with Nylon Insert - hex nut body with visible nylon locking insert; primary product view
Stainless Nylon Insert Lock NutsAlternative nut when prevailing-torque locking is needed.
Stainless Threaded Rods (DIN 976 / ASTM F593) - A2-70 / A4-80 - SS304 / SS316 - continuous threaded rod profile
Stainless Threaded RodsLong threaded fastening option for site adjustment or cut-to-length assemblies.
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Manufacturing

Manufacturing & Quality Control

Manufacturing CapabilityQuality Control
Cold forming or machining selected by size, quantity and toleranceIncoming SS304 / SS316 material verification
Thread tapping and deburring for metric nut threadsGO / NO-GO thread gauge inspection
Passivation and stainless surface finishingAcross-flats, height and thread depth inspection
Standard, semi-standard and drawing-based nut supplyProof load, hardness or salt-spray tests arranged when specified
Bulk, small-box or project kit packagingCoC, MTC and inspection report prepared on request
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FAQ

Common Questions Before RFQ

What is the difference between DIN 934 and ISO 4032 stainless nuts?

DIN 934 and ISO 4032 are common references for hex nuts. ISO 4032 is widely used as the international standard reference, while many drawings still call out DIN 934. Confirm the required standard, height, thread and marking before ordering.

Should I choose SS304 or SS316 stainless hex nuts?

SS304 / A2 is suitable for general corrosion-resistant indoor and outdoor assemblies. SS316 / A4 is preferred for marine, coastal, washdown, chemical or chloride-exposed environments.

What stainless hex nut sizes are commonly requested?

Common RFQ sizes include M6, M8, M10, M12, M16, M20 and M24 stainless hex nuts. Final thread pitch, standard, material, washer pairing and certificate requirements should be confirmed by drawing or purchase specification.

Can stainless hex nuts be supplied with bolts and washers?

Yes. Stainless hex nuts can be supplied alone or as bolt-nut-washer sets with DIN 931, DIN 933, ISO 4014, ISO 4017 or drawing-based stainless bolts.

Are passivated stainless nuts available?

Yes. Passivated stainless nuts are available for SS304 and SS316 supply, especially for outdoor, marine, washdown and project kit orders.

Are MTC and inspection reports available?

Material certificates, CoC and dimensional inspection reports can be supplied according to project requirements. Certificate scope should be confirmed before production or shipment.

Need DIN 934 / ISO 4032 stainless hex nuts?

Send your standard, size, material, quantity, thread pitch, certificate requirements and whether matching bolts and washers are needed. Our team can confirm the suitable stainless nut specification and provide a project quotation.

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