Hex Coupling Nuts Manufacturer In India – High Strength Astm Grade Industrial Coupling Nuts

Delta Fitt Inc. is one of the top Hex Coupling Nuts Manufacturer in India, providing high precision and durable coupling solutions that are used to connect two threaded rods. They are produced with superior materials, which include stainless steel, carbon steel, alloy steel, and brass and are good in terms of strength, corrosiveness, and service life. They are constructed in a common hexagonal shape to be easily wrenched, and therefore find their use in projects where there is a need to have longer rod extensions or alterations in structural and mechanical systems. Having different sizes, threads, and finishes, these coupling nuts can be used in any industrial setting and are guaranteed to perform reliably under severe conditions.

The Hex Coupling Nuts are now needed in the B2B business sector, as they are an important part of the construction, automotive, manufacturing, and machinery industries to allow their alignment, extension, and repair operations. Their exact threading and strong construction makes them stable and accurate in assembling long rods and hence have been very popular among engineers and project managers. These nuts have a constant load distribution and simplification of installation, which play a role in the efficient execution of a project in large industrial systems. Their flexibility and dependability ensure that they are a valuable fastening product to a company that requires a high performance and robust connecting hardware. We supply Hex Jam Nuts engineered for tight locking against standard nuts, ensuring secure fastening in vibration-prone environments.

Material & Grades Table – Hex Coupling Nuts

Material	Grade / Standard	Size / Thickness / Diameter	Extra Specification	Weight (kg/1000 pcs)
Stainless Steel	SS 304 / ASTM F594	M4–M30	General-purpose corrosion-resistant coupling nut	Approx. 2–500
Stainless Steel	SS 316 / ASTM F594	M4–M30	Marine and chemical applications	Approx. 2–500
Stainless Steel	SS 316L	M4–M30	Low-carbon corrosion-resistant construction	Approx. 2–500
Carbon Steel	ASTM A563 Grade A	M5–M36	General industrial applications	Approx. 3–800
Carbon Steel	ASTM A563 Grade C	M8–M36	Higher-strength coupling applications	Approx. 5–900
Alloy Steel	ISO 898-2 Class 10	M6–M36	High-strength metric coupling nut	Approx. 4–900
Alloy Steel	ISO 898-2 Class 12	M6–M36	Heavy-duty mechanical applications	Approx. 4–900
Brass	ASTM F467	M4–M24	Electrical and specialized applications	Approx. 2–400

Key Features & Advantages

• Connects two externally threaded components
• Hexagonal body allows easy tool engagement
• Provides extended threaded connections
• Suitable for threaded rods, studs, and bolts
• Stainless steel grades provide excellent corrosion resistance
• High-strength options support demanding mechanical applications
• Available in different lengths, threads, grades, coatings, and finishes

Chemical Composition

Representative Grade: Stainless Steel 304

Element	Percentage (%)
Chromium (Cr)	18.0–20.0
Nickel (Ni)	8.0–10.5
Manganese (Mn)	2.00 max.
Carbon (C)	0.080 max.
Silicon (Si)	1.00 max.
Iron (Fe)	Balance

Mechanical Properties

Property	Value
Tensile Strength	515 MPa min.
Yield Strength	205 MPa min.
Elongation	40% min.
Hardness	92 HRB max.

Equivalent Grade

Standard	Grade
ASTM	F594 Type 304
UNS	S30400
EN	1.4301
DIN	X5CrNi18-10