API 20E and 20F specify requirements for different bolting specification levels (BSL), and define different levels of technical, quality and qualification requirements.
API 20E & API 20F Bolting
Finework is a licensed manufacturer and supplier of critical bolting to API 20E & 20F.
We hold manufacturing licenses to mark bolting with the API Monogram
Application can be:
Blow Out Preventers (BOPs)
Risers
Manifolds
Drilling
Equipment
Valves
Wellheads
Trees
Connectors
High Pressure / High Temperature Equipment (HPHT)
API 20E (Alloy and Carbon Steel Bolting)  20F (Corrosion Resistant Bolting)
Fastener products include but not limited to: Fully Threaded Stud bolts, Hexagon Nuts, Tap End Studs, Flange (Collar Bolts) Hexagon Bolts, Socket Head Cap screws & 12 point Bolts / Nuts.