3.1 Bolts for API 6A, 6BX, 16A and 17D Flanges.
API specifies bolts and
nuts for all standard flanges referencing various ASTM
specifications, API product specification levels (PSL's) do not
apply to studs and nuts. WOODCO USA offers bolts and nuts meeting API
requirements and also meeting ASTM A 320 and ASTM A 194 for all API
temperature service. Commonly known as grade L7 bolts and 2H heavy
hex nuts. All bolts and tap end studs sold by WOODCO USA have had
CVN tests at
Unless otherwise specified, low alloy bolts, tap end studs, and nuts for surface connections shall have zinc plating.
Low alloy bolts, tap end studs, and nuts for subsea applications shall have Fluoropolymer coating.
3.2 Bolts, Spherical Washers, and Safety Hoist Rings, as Replacement parts for Clamps to Fit API Spec 16A Hubs.
API specifies design criteria for clamps to connect API Spec 16A hubs, but does not specify clamp dimensions. Specific dimensions of clamps made by different manufacturers’ may vary. To view and order parts for WOODCO USA made clamps, from an established catalog table of parts, Click Here.
If you cannot identify the manufacturer or size of a clamp that you may already have, that you believe may fit API Spec 16A hubs, Click Here.
To obtain parts for clamps made by an unknown manufacturer:
Measure the existing bolt length (L) and diameter (D) and order like replacements with nuts (N).
Request replacement spherical or self aligning washers to fit the bolt size
Request replacement safety hoist rings by diameter of the threaded screw (D).
Replacement bolts, nuts, and spherical washers supplied by WOODCO USA shall have Fluoropolymer coating.
Bolts and Tap End Studs meet the requirements of ASTM A320 GR-L7.
Nuts meet the requirements of ASTM A193 GR-2H.
Bolts and nuts, Green
Outer washers (load), Red
Inner washers (bearing), Blue