API 20E Bolting Products - Speciality Fasteners

NUBOTECK manufactures certified boltings as per API 20E requirements. These fasteners are used in critical Surface and Subsea equipments of Oil and Gas industry. Due to the engineering involved to maintain the stringent quality parameters, the manufacturing process infuses reliability in these fasteners.


API 20E Licence #20E-0096

Three Bolting Specifications: API 20E BSL1, API 20E BSL2, API 20E BSL3

Each bolting specification (BSL1, BSL2, BSL3) is unique due to the extent of quality controls that the bolting manufacturer has to establish for each level. These controls start right from raw material and goes upto the final inspection of the product. NUBOTECK has established below controls even in general manufacturing practice.

  • Steel Making Process - Melting, Casting, Hotwork Ratio
  • Material Properties - Cleanliness, Chemistry, Inclusion, Banding
  • Heat Treatment - Batches, Temperature Cycles, Equipment
  • Mechanical Properties - Hardness, Tensile, Yield, Elongation, Impact
  • Product Manufacuring - Machining, Rolling, Tapping
  • Non-Destructive Examination - Volumetric, Surface
  • Dimensional Properties - Unified National Threads (External - UNR, Internal - UN) ASME B1.1
  • Coating/ Plating - Hydrogen embrittlement prevention

Bolting Material - API 20E

NUBOTECK understands the criticality of API 20E boltings. To ensure material traceability, the raw material is procured only from steel mills. We manufacture to below bolting grades. Huge emphasis is laid on the traceability of the material using heat-numbers, heat lots and production lots. We provide all the test results on our test certificate which is compliant with EN 10204 3.1

Stud Grade Nut Grade Steel Grade
ASTM A193 B7 ASTM A194 2H 4140, 4142, 4145, 4140H, 4142H, 4145H
ASTM A320 L7 ASTM A194 7 4140, 4142, 4145, 4140H, 4142H, 4145H
ASTM A193 B7M ASTM A194 2HM 4130, 4140, 4142, 4145, 4130H, 4140H, 4142H, 4145H
ASTM A320 L7M ASTM A194 7M 4140, 4142, 4145, 4140H, 4142H, 4145H



GAT 144/1, Sanaswadi, Pune - Ahmednagar Highway, Shirur, Pune, Maharashtra 412208, India

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