ASTM A 453 GR 660 Class D Nuts

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ASTM A 453 GR 660 Class D Nuts Manufacturer and Supplier in Muscat, OMAN

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Mazin Fasteners is a well-respected manufacturer and supplier of ASTM A453 Grade 660 Class D Nuts, proudly based in Muscat, Oman. We cater to demanding industrial sectors throughout the Middle East and beyond. Our focus is on precision manufacturing, rigorous quality control, and adherence to international standards, all to provide top-notch fastening solutions. With our advanced production capabilities and technical know-how, we offer nuts that excel in high-temperature and high-stress environments. Our dedication to reliability, material traceability, and prompt delivery makes us the go-to choice for critical fastening needs.

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ASTM A453 Grade 660 Class D Nuts are crafted from a specialized precipitation-hardened iron-nickel-chromium alloy, enriched with nickel, chromium, molybdenum, and aluminum to boost strength and oxidation resistance. This alloy ensures remarkable mechanical stability even at elevated temperatures. These nuts showcase impressive tensile and yield strength, solid creep resistance, and dependable hardness retention under thermal stress. Their mechanical properties hold steady during prolonged high-temperature use, guaranteeing secure fastening, dimensional integrity, and resistance to deformation in demanding operating conditions.

ASTM A 453 GR 660 Class D Nuts Specifications

Material	Dimensions	Standards	Size	Length
ASTM A453 GR 660 CLASS D Bolts	ASME B18.2.1, B18.3	ASTM, ASME	M 02 to M 160	3 mm to 200 mm

ASTM A453 Gr 660 Set Screw, Gr 660 Class D Hex Nuts, ASTM A 453 Tie Rod, Gr 660 Class D Flange Lock Nut, ASTM A453 Gr 660 Nylon Lock Nut Stockist in Muscat, OMAN.

ASTM A 453 GR 660 Class D Nuts Chemical Composition

Element	Content
Carbon	0.08 max
Manganese	2.00 max
Phosphorus, max	0.040 max
Sulfur, max	0.030 max
Silicon	1.00 max
Nickel	24.0-27.0
Chromium	13.5-16.0
Molybdenum	1.00-1.50
Tungsten	–
Titanium	1.9-2.35
Aluminum	0.35 max
Vanadium	0.10-0.50
Boron	0.001-0.010

ASTM A 453 GR 660 Class D Nuts Mechanical Properties

Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa)	895 min
Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa)	585 min
Elongation in 4D (El)	15
Reduction	18

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Commited to High Quality Service

To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.

You’ll find ASTM A453 Grade 660 Class D Nuts in a variety of applications that demand high strength and outstanding performance in elevated temperatures. Common uses include gas turbines, steam turbines, boilers, heat exchangers, aerospace assemblies, and power generation equipment. They’re also frequently utilized in petrochemical plants, refineries, and high-temperature pressure systems where creep resistance and long-term stability are crucial. These nuts are perfect for bolting assemblies that face thermal cycling, vibration, and sustained loads, making them a reliable choice for critical applications.