Name: UNI 5587 Thick Hex Nuts
Availability: InStock
Rating: 4.5 (89 reviews)

UNI 5587 Thick Hex Nuts

Our UNI 5587 Thick Hex Nuts, often referred to as "Heavy Hex Nuts" or "Extra Thick Nuts," are engineered to deliver exceptional load-bearing capacity and secure performance in the most demanding applications. Manufactured to the exacting dimensional and mechanical specifications of the UNI 5587 Italian national standard, these nuts feature a significantly greater height and width across flats than standard hex nuts. This robust design provides a larger bearing surface, deeper thread engagement, and superior resistance to vibration loosening, making them the ideal choice for structural, heavy machinery, and critical assembly environments where safety and reliability are paramount.

Description

Product Details

Name	Thick Hex Nuts	Materials	Carbon Steel/Stainless Steel
Standards	UNI5587	Strength level	8 10 12 A2-70 A4-70 A4-80
Size	M3-M80	Surface finish	ZP\HDG\BLACK\Dacromet etc.
Length	/	Samples	Available

Product Parameters

Thread Size		M3	M4	M5	M6	M7	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27
d		M3	M4	M5	M6	M7	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27
P	Coarse Pitch	0.5	0.7	0.8	1	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3
P	Fine Pitch	/	/	/	/	/	1	1.25	1.25	1.5	1.5	1.5	1.5	1.5	2	2
e	min	6.08	7.74	8.87	11.05	12.12	14.39	18.9	21.1	24.49	26.75	30.14	33.53	35.72	39.98	45.63
m	max=nominal size (h14)	3	4	5	6	7	8	10	12	14	16	18	20	22	24	27
m	min	2.75	3.7	4.7	5.7	6.64	7.64	9.64	11.57	13.57	15.57	17.57	19.48	21.48	23.48	26.48
s	max=nominal size	5.5	7	8	10	11	13	17	19	22	24	27	30	32	36	41
s	min	5.38	6.85	7.85	9.78	10.73	12.73	16.73	18.67	21.67	23.67	26.67	29.67	31.61	35.38	40.38
per 1000 units≈kg	Coarse Thread	0.47	1	1.52	2.96	3.93	6.5	14.3	20.3	31.5	40.5	58.2	79.1	94.9	137	200
per 1000 units≈kg	Fine Thread	/	/	/	/	/	6.38	14.2	19.8	30.8	39.6	55.9	76.2	91.4	133	195

Thread Size		M30	M33	M36	M39	M42	M45	M48	M52	M56	M60	M64	M68	M72	M76	M80
d		M30	M33	M36	M39	M42	M45	M48	M52	M56	M60	M64	M68	M72	M76	M80
P	Coarse Pitch	3.5	3.5	4	4	4.5	4.5	5	5	5.5	5.5	6	6	/	/	/
P	Fine Pitch	2	2	3	3	3	3	3	3	4	4	4	4	6	6	6
e	min	51.28	55.8	61.31	66.96	72.61	78.26	83.91	89.56	95.07	100.72	106.37	112.02	117.67	123.32	128.97
m	max=nominal size (h14)	30	33	36	39	42	45	48	52	56	60	64	68	72	76	80
m	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=nominal size	46	50	55	60	65	70	75	80	85	90	95	100	105	110	115
s	min	45.38	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
per 1000 units≈kg	Coarse Thread	284	361	483	623	795	988	1220	1470	1770	2080	2450	2840	/	/	/
per 1000 units≈kg	Fine Thread	274	350	474	612	776	966	1180	1430	1730	2050	2390	2780	3270	3740	4250

Key Features & Benefits

Maximum Load Distribution & Strength: The increased height and larger wrenching surfaces distribute clamping force over a wider area, reducing stress on the mating thread and connected parts. This design provides superior performance in high-tensile, high-vibration, and dynamic load conditions.

Enhanced Vibration Resistance: The deeper thread engagement length significantly improves resistance to self-loosening caused by vibration, shock, or thermal cycling, ensuring a secure, long-lasting connection with reduced maintenance needs.

Robust & Durable Construction: Manufactured from high-grade materials under stringent quality controls, these nuts guarantee consistent mechanical properties, dimensional accuracy, and durability for long-term service life.

Improved Wrenchability: The larger hex size (across flats) provides better grip for tools, allowing for higher, more accurate torque application and easier installation/removal in tight or high-torque scenarios.

Versatile Compatibility: While conforming to the UNI standard, the metric thread specification ensures broad compatibility with a wide range of industrial bolts, studs, and threaded rods used in European and international markets.

Corrosion-Resistant Options: Available in a variety of protective finishes, including Electro-Zinc Plated, Hot-Dip Galvanized, and Stainless Steel (A2/A4), to withstand harsh environmental conditions.

Intended Applications

UNI 5587 Thick Hex Nuts are specifically designed for applications requiring superior strength and reliability:

Structural Steel Construction: Bridges, building frames, trusses, and seismic bracing systems.

Heavy Machinery & Equipment: Mining equipment, presses, agricultural machinery, and industrial processing units.

Wind Energy & Power Generation: Turbine assembly, tower flanges, and heavy-duty generator connections.

Transportation & Rail: Chassis components, bogie assemblies, and track fastening systems.

Marine & Offshore: Deck fittings, mooring systems, and offshore platform structures.

High-Pressure Piping & Vessels: Flange connections in oil & gas, petrochemical, and hydraulic systems.

Installation Guidelines

1.Match Strength Classes: Always pair the nut with a bolt of equal or compatible strength class for optimal performance (e.g., Class 10 nut with Class 10.9 bolt).

2.Ensure Clean Threads: Clean all mating threads of dirt, debris, or damage before assembly.

3.Use Correct Tools: Use calibrated torque wrenches and sockets that properly fit the larger hex size to avoid rounding and ensure accurate preload.

4.Apply Recommended Torque: Follow industry-standard torque tables based on the nut/bolt size, strength class, and lubrication condition.

Note: The thicker nut may allow for a slightly higher torque value compared to a standard nut, depending on the application.

Why Choose Our UNI 5587 Thick Hex Nuts?

Certified Quality: Our nuts are produced to meet strict international quality standards, with material certifications and traceability available upon request.

Engineering Support: Our technical team can assist with load calculations, material selection, and application-specific recommendations.

Competitive Pricing & Inventory: We offer direct manufacturer pricing and maintain a substantial stock for reliable, timely delivery on both standard and project-based orders.

Customization Options: We can provide custom sizes, special coatings, and unique packaging to meet your exact project specifications.

About Us

SEVEN REASONS WHY SHOULD YOU CHOOSE HAOSHENG FASTENER

1.Focus on Fasteners

Deeply cultivating the fastener industry for 30 years, serving a total of 10000+ customers

2.Scale and Strength

The factory covers an area of 20000 square meters and has an annual output exceeding 60000 tons

3.Honor and Qualifications

We own ISO9001 ISO14001 and ISO45001 three major System Certifications and are High-tech Enterprise in Hebei Province

4.Internationalization

We have exported to 38 countries and regions and our duty for the EU anti-dumping is 39.6%.

5.Free Sample

We accept free samples for your convenience to inspect if our quality meet your needs.

6.Spot Goods

The inventory of hot selling products reaches up to 2000 tons, meeting the needs of different customers.

7.Source factory

We support customization and have a wide range of fastener products. The price is competitive and there are no intermediaries.

Certificate

Production Process

Customers

FAQ

Q1: Are you manufacturer or trading company?

A1: We are professional manufacturer with 30 years experience. We accept OEM, ODM as your needs and assure the competitive price and quality for you.

Q2: Can you offer me sample?

A2: Yes, we can offer you sample to test and check quality.

Q3: How does your factory do regarding quality control?

A3: We have professional QC team to inspect each items from the links of production to package.

Q4: How about your delivery time?

A4: Normally it will take 30-35 days after receiving your deposit.

Q5: What is your terms of payment?

A5: T/T 30% as deposit, and 70% balance before delivery.

Q6: What advantages we have?

A6 1.Strict QC: For each order, strict inspection will be carried out by the QC department before shipping. The bad quality will be avoid within door.

2.Shipping: We have shipping department and forwarder, so we can promise faster delivery and make the goods well protected.

3.Our factory professional production metal box drawer system ,hinge，concealed drawer slides ,ball bearing slides , etc furniture fittings.

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