Structural Bolts

Preloaded and non-preloaded structural bolt assemblies for steel construction per GB/T 1231 and ASTM A325.

GB/T 1231 Structural Bolt Assembly

GB/T 1231

High strength structural bolt assembly (bolt + nut + washers) per GB/T 1231 for preloaded steel structure connections.

ASTM A325 / F3125

Heavy hex structural bolt per ASTM A325 / F3125 for steel structure connections in North American standard projects.

Products	Standard	Specifications
GB/T 1231 Structural Bolt Assembly	GB/T 1231	High strength structural bolt assembly (bolt + nut + washers) per GB/T 1231 for preloaded steel structure connections.
ASTM A325 / F3125 Structural Bolt	ASTM A325 / F3125	Heavy hex structural bolt per ASTM A325 / F3125 for steel structure connections in North American standard projects.

How should I specify a fastener for quotation?: Specify head shape, drive, thread, material and finish. We review the drawing and manufacturing requirements before quotation.
What must be confirmed before production?: Order quantity, sample arrangements, inspection and delivery schedule are agreed for each project.