Manufacturer - Stud, Nut, Bolt - API Fastener

Studs

Studs are metal rods with threads either on full length or at both ends. These complement with Nuts to bind the two surfaces together

Material Grade: B7, B7M, L7, L7M

Dimensions: ASME B18.31.2

Threads: ASME ASME B1.1 - UNR

Depending on the customer's specifications, chamfered ends are provided

Nuts

Nuts feature internal threads that fit to create a strong attachment between the joining surfaces.

Material Grade: 2H, 2HM, 7, 7M

Dimensions: ASME B18.2.2

Threads: ASME ASME B1.1 - UN

Nuts may either have both sides chamfered or have one side as washer-faced

Bolts

Bolt, the counterpart of nut, feature an external, partially or fully threaded shaft. These have a head at one end.

Material Grade: B7, B7M, L7, L7M

Dimensions: ASME B18.2.1

Threads: ASME ASME B1.1 - UNR

Depending on the customer's drawings, geometry is customised further

Product Grades

NUBOTECK has capability to manufacture to following regular bolting grades. We choose our raw material with utmost care.

ASTM A193 Grades B7, B7M
ASTM A194 Grades 2H, 2HM, 7, 7M
ASTM A320 Grades L7, L7M, L43

Surface Finish

To add corrosion resistance to the fasteners, customers choose the desired finish based on the application, exposure to elements, further treatment. NUBOTECK offers below types of surface finishes.

Phosphated - Manganese
Zinc Plated - Yellow Chromate
PTFE Coated - Xylan - Blue (1070, 1424)

Bolting Applications

Our bolting products are made to the withstand high pressure high temperature environments. We manufacture certified fasteners for Oil and Gas industry.

Our API-20E certified fasteners are generally applied to below products to ensure their compliance with the respective American Petroleum Institute (API) standard.

Product Name	API Standard
Wellheads - Christmas Tree	API 6A
Piping Valves	API 6D
Subsea Pipeline Valves	API 6DSS
Blowout Preventers	API 16A
Choke and Kill Equipment	API 16C
Subsea Wellhead and Tree Equipment	API 17D

Studs

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Material Grade: B7, B7M, L7, L7M

Dimensions: ASME B18.31.2

Threads: ASME ASME B1.1 - UNR

Nuts

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Material Grade: 2H, 2HM, 7, 7M

Dimensions: ASME B18.2.2

Threads: ASME ASME B1.1 - UN

Bolts

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Material Grade: B7, B7M, L7, L7M

Dimensions: ASME B18.2.1

Threads: ASME ASME B1.1 - UNR

Product Grades

Surface Finish

Bolting Applications

Our API-20E certified fasteners are generally applied to below products to ensure their compliance with the respective American Petroleum Institute (API) standard.