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UNI5587 Thick Hex Nuts

UNI 5587 Thick Hex Nuts are designed for bolted connections where a deeper nut profile and greater thread engagement are preferred over a standard hex nut. The increased nut height provides more threaded engagement with the mating bolt or stud, making the nut a practical choice for connections that require a robust and substantial fastening interface. The nut can be supplied in carbon steel, alloy steel, and stainless steel, with different property classes and finishes available according to the application. Carbon and alloy steel versions can be selected where mechanical strength is the primary consideration, while A2 and A4 stainless steel options are suitable when corrosion resistance is more important, particularly in humid, outdoor, or exposed environments.

For proper selection, customers should consider not only the nominal thread size, but also the thread pitch, nut height, property class, material, bolt strength, available installation space, and surface finish. Matching the nut correctly with the bolt or stud helps ensure adequate thread engagement and a reliable fastening connection. For industrial buyers, the thicker profile can also be useful when a more substantial nut is preferred for assembly, maintenance, or structural connections without changing the basic metric thread system.

Italian Standard UNI5587 Thick Hex Nuts Large size M72 Big Nuts
UNI5587 Stainless Steel Thick Hex Nut SS304 SS316 Nut

Specification:

UNI 5587 Thick Hex Nuts are manufactured according to the dimensional requirements of UNI 5587 and are available in carbon steel, alloy steel, and stainless steel. Different material grades and property classes can be selected according to the required mechanical performance and service environment. The nuts are available with metric ISO threads and controlled thread tolerances, together with various surface treatments for different applications. Steel versions can be supplied in black oxide, zinc plated, or hot-dip galvanized finishes, while stainless steel nuts are available with cleaning or passivation treatments.

ItemSpecification
StandardUNI5587
Product TypeThick Hex Nut
Thread SystemMetric
Thread StandardISO965/ISO261
Thread Tolerance6H
Thread PitchCoarse/Fine
Size RangeM3-M80
Steel PropertyISO898-2
Stainless Steel PropertyISO3506-2
MaterialCarbon Steel, Alloy Steel Stainless Steel
Surface TreatmentBlack Oxidation,Zinc Plated,HDG
InspectionDimensional,Thread,Mechanical Property,Surface Treatment

Dimension Chart of UNI5587 Thick Hex Nuts:

The dimension chart provides the main measurements needed to select UNI 5587 Thick Hex Nuts and match them with the corresponding bolts or studs. Nominal thread size, thread pitch, nut height, and width across flats are the key dimensions for checking fit, tool access, and available installation space.

UNI 5587 Hex Thick Nut Dimension Chart Drawing_

Thread DiameterM3M4M5M6M8M10M12M14M16M18M20M22M24M27M30
P0.50.70.811|1.251.25|1.51.25|1.751.5|21.5|21.5|2.51.5|2.51.5|2.52|32|32|3.5
e min6.087.748.8711.0514.3918.921.124.4926.7530.1433.5335.7239.9845.6351.28
k max3456810121416182022242730
k min2.753.74.75.77.649.6411.5713.5715.5717.5719.4821.4823.4826.4829.48
s max5.578101317192224273032364145
s min5.386.857.859.7812.7316.7318.6721.6723.6726.6729.6731.6135.3840.3844.38
Thread DiameterM30M33M36M39M42M45M48M52M56M60M64M68M72M76M80
P2|3.52|3.53|43|43|4.53|4.53|53|54|5.54|5.54|64|6666
e min51.2855.861.3166.9675.6178.2683.9189.5695.07100.72106.37112.02117.67123.32128.97
k max303336394245485256606468727680
k min29.4832.3835.3838.3841.3844.3847.3851.2655.2659.2663.2667.2671.2675.2679.26
s max4550556065707580859095100105110115
s min44.3849.3854.2659.2664.2669.2674.2679.2684.1389.1394.1399.13104.13109.13114.13

Application of UNI5587 Thick Hex Nuts:

Heavy-Duty Mechanical Assemblies

UNI 5587 Thick Hex Nuts are suitable for machinery, equipment frames, brackets, fabricated components, and mechanical assemblies where a deeper nut profile and greater thread engagement are preferred. The thicker body provides a substantial fastening interface for applications requiring a robust nut design.

Steel Structures & Industrial Equipment

These nuts can be used in steel structures, industrial equipment, support frames, mounting systems, and fabricated steel assemblies. Carbon and alloy steel versions can be selected for different mechanical requirements, with zinc plating or hot-dip galvanizing available for applications requiring additional corrosion protection.

Outdoor & Corrosion-Resistant Assemblies

For applications exposed to moisture, weather, or corrosive environments, stainless steel A2 and A4 versions provide an alternative to carbon steel nuts. Stainless steel nuts can also be supplied with cleaning and passivation treatments to support corrosion-resistant applications.