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.


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.
| Item | Specification |
|---|---|
| Standard | UNI5587 |
| Product Type | Thick Hex Nut |
| Thread System | Metric |
| Thread Standard | ISO965/ISO261 |
| Thread Tolerance | 6H |
| Thread Pitch | Coarse/Fine |
| Size Range | M3-M80 |
| Steel Property | ISO898-2 |
| Stainless Steel Property | ISO3506-2 |
| Material | Carbon Steel, Alloy Steel Stainless Steel |
| Surface Treatment | Black Oxidation,Zinc Plated,HDG |
| Inspection | Dimensional,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.

| Thread Diameter | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 |
| P | 0.5 | 0.7 | 0.8 | 1 | 1|1.25 | 1.25|1.5 | 1.25|1.75 | 1.5|2 | 1.5|2 | 1.5|2.5 | 1.5|2.5 | 1.5|2.5 | 2|3 | 2|3 | 2|3.5 |
| e min | 6.08 | 7.74 | 8.87 | 11.05 | 14.39 | 18.9 | 21.1 | 24.49 | 26.75 | 30.14 | 33.53 | 35.72 | 39.98 | 45.63 | 51.28 |
| k max | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 27 | 30 |
| k min | 2.75 | 3.7 | 4.7 | 5.7 | 7.64 | 9.64 | 11.57 | 13.57 | 15.57 | 17.57 | 19.48 | 21.48 | 23.48 | 26.48 | 29.48 |
| s max | 5.5 | 7 | 8 | 10 | 13 | 17 | 19 | 22 | 24 | 27 | 30 | 32 | 36 | 41 | 45 |
| s min | 5.38 | 6.85 | 7.85 | 9.78 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.67 | 29.67 | 31.61 | 35.38 | 40.38 | 44.38 |
| Thread Diameter | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 | M56 | M60 | M64 | M68 | M72 | M76 | M80 |
| P | 2|3.5 | 2|3.5 | 3|4 | 3|4 | 3|4.5 | 3|4.5 | 3|5 | 3|5 | 4|5.5 | 4|5.5 | 4|6 | 4|6 | 6 | 6 | 6 |
| e min | 51.28 | 55.8 | 61.31 | 66.96 | 75.61 | 78.26 | 83.91 | 89.56 | 95.07 | 100.72 | 106.37 | 112.02 | 117.67 | 123.32 | 128.97 |
| k max | 30 | 33 | 36 | 39 | 42 | 45 | 48 | 52 | 56 | 60 | 64 | 68 | 72 | 76 | 80 |
| k min | 29.48 | 32.38 | 35.38 | 38.38 | 41.38 | 44.38 | 47.38 | 51.26 | 55.26 | 59.26 | 63.26 | 67.26 | 71.26 | 75.26 | 79.26 |
| s max | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 |
| s min | 44.38 | 49.38 | 54.26 | 59.26 | 64.26 | 69.26 | 74.26 | 79.26 | 84.13 | 89.13 | 94.13 | 99.13 | 104.13 | 109.13 | 114.13 |
- RELATED NUT LISTS:
- DIN6334 Hexagon Coupling Nuts
- ASME/ANSI B 18.2.2 Hex Slotted Nuts/Castle Nuts
- ASME/ANSI B18.2.2 Hex Flange Nuts
- Lock Nuts
- IFI145 Flange Nuts
- DIN982 Nylon Lock Nuts
- DIN985 Nylon Lock Nuts
- ASME B 18.16.6 Nylon Nuts
- HEX NUT
- JIS 1186 Hex Nuts
- DIN934 Hex Nuts
- A194 Hex Nuts
- A563 Hex Nuts
- DIN6915 Hex Nuts
- GOST 28919 Thick Hex Nuts
- GOST R 52645 Structural Hex Nuts
- GOST 5915 Hex Nut
- UNI5588 Hex Nuts
- UNI5713 Hex Nuts
- AS1252 Hex Nuts
- AS/NZS 2451 Hex Nuts
- AS/NZS 2465 Hex Nuts
- AS 1112.1 Hex Nut
- DIN6330 Hex Thick Nuts
- ASME/ANSI B 18.2.2 Hex Thick Nuts
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.
