ASTM A194 GRADE 2H HEAVY HEX NUT HOT DIPPED GALVANIZED + BLUE WAX

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ASTM A194 GRADE 2H HEAVY HEX NUT HOT DIPPED GALVANIZED + BLUE WAX (1)

ASME B18.2.2 ASTM A194 Grade 2H DH Galvanized Heavy Hex Nuts Blue Wax

Yokelink could supply the ASTM A194/A563 Hex Nuts in blue wax, A194 2H is a standard material (usually carbon steel or alloy steel) for high pressure/high temperature applications, often used in harsh environments such as valves and pipes. The blue wax nut is used for Lubricate threads: Reduces friction during installation and prevents seizure (especially for stainless steel or high-temperature fasteners). Long-term rust prevention: The wax layer seals the metal surface and blocks moisture.

Hex Nut Blue Waxed Features:

Finish: Hot Dipped Galvanized + Blue Wax
Grade: 2H
Material: Steel
Specification: ASME B18.2.2
Specification: ASTM A194
Thread Type: Coarse
Type: Structural

A194 A563 2H/DH Heavy Hex Nut Specification:

Why are some hex nuts blue in color?

A563 Gr. Dh & 2h Heavy Hex Nut HDG with blue Wax

Factory Direct Hexagon Nut Hex Nuts with Blue Wax DIN934

It is often asked why some high strength hex nuts that are supplied with high strength bolts appear to be blue or some other color. This is normally the case with galvanized, high strength, heavy hex nuts and the reason for this is because of the wax lubricant applied to the nuts. According to the ASTM A563 specification, “Hot-dip and mechanically deposited zinc-coated Grade DH nuts shall be provided with an additional lubricant which shall be clean to the touch”.

The dye color is so that the presence of the lubricant is obvious and recognizable. Supplementary Requirement S2 under ASTM A563 specifies that the lubricant shall have a contrasting color to make its presence obvious, however it is not required unless specified. Since the A563 specification only requires an additional lubricant for galvanized DH nuts, Supplementary Requirement S1 can be specified, which requires that the nuts shall be provided with an additional lubricant regardless of the finish.

When lubricated A563DH nuts are supplied, they will typically possess a contrasting color, most often blue, regardless of whether or not the supplementary requirement, S2, has been specified. This makes the lubrication easy to recognize and alleviates any potential confusion. Another thing to keep in mind is that ASTM A194 2H nuts may also come with a dyed lubricated coating. The reason for this is because the ASTM A563 specification allows for A194 2H nuts as an acceptable substitute for A563DH.

Buy ASTM A563 A194 2H DH Hex Heavy Nut From Yokelink

Yokelink Hex nuts are used to fasten attachments to machine bolts, carriage bolts, insulator pins and other bolts. Galvanized hex nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.

The ASTM A194 specification covers carbon, alloy, and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1-inch nominal size shall be UNC Series Class 2B fit. Nuts over 1-inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of

DH nuts in certain diameters and finishes.

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