Metric Heavy Hex Nut for Grooved Couplings

Standard: EN 20898-2 Material Standard: Carbon steel according to ISO 898-2, Class 8 Surface Protection: Zinc electroplated to ISO 2081 Fe/Zn5 or chromed to ISO 4520 Class 1A Size Range: M10 to M22 Thread Type: Coarse metric thread Main Use: Fastening grooved coupling housing and compressing gasket for sealing

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Трубопроводы и комплектующие

Аксессуары для пазовых фитингов

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The Metric Heavy Hex Nut is used together with a metric oval neck track head bolt to fasten grooved coupling housings. It helps apply the required pressure to the gasket for reliable sealing in grooved piping connection assemblies.

Key Features

Metric heavy hex nut for grooved coupling assemblies
Used with metric oval neck track head bolts
Helps tighten the coupling housing securely
Supports gasket compression for sealing performance
Carbon steel construction according to ISO 898-2 Class 8
Available in M10, M12, M16, M20, and M22 sizes
Zinc electroplated or chromed surface finish available

Product Configurations

Item	Details
Application	Grooved coupling housing fastening
Matching Bolt	Metric oval neck track head bolt
Thread Type	Coarse metric thread
Nut Size Options	M10, M12, M16, M20, M22
Width Across Flats	15.73–34.00 mm, depending on size
Minimum Height / Dimension G	17.70–37.29 mm, depending on size
Material Grade	Carbon steel, ISO 898-2 Class 8
Surface Finish	Zinc electroplated or chromed

FAQ
Q1: Who are we?
A: We are a fire fighting equipment manufacturer based in Fujian, China. Since 2004, we have supplied a wide range of fire safety products for domestic and international markets, including fire sprinklers, hydrants, valves, hoses and extinguishers.
Q2: How do we ensure product quality?
A: We follow strict quality control procedures from raw material inspection to production and final shipment. Pre-production samples and final inspections can be arranged according to order requirements.
Q3: What products do we supply?
A: We supply fire sprinklers, fire extinguishers, fire hydrants, fire valves, fire hoses, hose reels, fire cabinets, foam equipment and other fire fighting accessories.
Q4: Why choose Sunroom?
A: Sunroom has over 21 years of experience in fire fighting equipment manufacturing. We offer a wide product range, support customized production, and provide certificates or technical documents according to product and project requirements.

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