Used for specified bolted connections in steel structures, bridges, machinery and construction, with strength, geometry and finish confirmed for the approved joint design.
High Strength Hex Bolt is selected against the approved joint drawing and service conditions.
The former standalone ASTM A325 and A490 specifications were replaced by ASTM F3125/F3125M; A325 and A490 remain grade designations. Confirm the requested edition, grade, type, units and bolt geometry separately from DIN, ISO or GB products. The size and finish lists on this page describe the product family, not every permitted standard, grade and coating combination.
Do not assume that hot-dip galvanizing, zinc plating or a trade-name zinc-flake finish is acceptable for every high-strength grade. For A490 requests, confirm the coating provisions of the specified edition and any required qualification and assembly tests before quotation. The current supply reference is DIN 931 / DIN 933 / ISO 4014 / ISO 4017 / GB 5782 / GB 5783 / ASTM F3125/F3125M Grades A325 / A490 (edition and compliance to confirm), with Alloy Steel / Carbon Steel, Black / Zinc Plated / HDG / Dacromet, and M8–M64/8.8-12.9.
Final dimensions, tolerances, grade or class, coating system, matched components, inspection documents and packing must be confirmed against the purchase order, approved drawing or project specification before production.
The side elevation uses under-head length l, excluding the head. Confirm thread diameter d, thread length b, head height k and width across flats s in the separate end view. Partial thread is illustrated; full-thread, fine-thread and other variants require confirmation against the selected standard.
The illustration is a dimension-selection reference, not a manufacturing drawing and not to scale. Final geometry, tolerances, material, finish and mating-part fit must follow the buyer-approved drawing and applicable standard.
Assess moisture, salt, chemicals, temperature and dissimilar-metal exposure against the project requirements. A finish name alone does not establish service life or suitability.
Do not assume that hot-dip galvanizing, zinc plating or a trade-name zinc-flake finish is acceptable for every high-strength grade. For A490 requests, confirm the coating provisions of the specified edition and any required qualification and assembly tests before quotation.
This product page identifies the available product family and basic supply range. Final compliance depends on the exact standard, grade, dimensions, finish, mating components, tests and documents stated on the purchase order or approved drawing.
Product · standard · grade · dimensions · finish · quantity · documents · destination
Attach drawings or a size list in your email or WhatsApp conversation. State any required tests or documents for confirmation.