3-1/4"-8 UN x 25-1/2" Studbolts with Heavy Hex Nuts

32 fully threaded 3-1/4"-8 UN × 25-1/2" end-to-end studbolts in ASTM A320 L43 with 64 heavy hex nuts in ASTM A194 Grade 7, assembled and ready to ship.

Studs are cut from certified bar, threaded by rolling or single-point cutting to the class called out, and chamfered and marked before they leave. Double-end and tap-end patterns, special lengths and drilled or coated variants are all made to the drawing.

About the material: 4340 low-temperature bolting — L7 strength in diameters up to 4 in., thanks to the deep hardenability of a nickel-chrome-moly steel. Read the A320 L43 data page →