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Select standard compliant bolts & nuts for construction and industrial projects, check grade, finish and certificates.

Learn to calculate concrete screw load capacity, select proper types for concrete, brick and masonry projects.

Avoid screw slip and part damage. Select proper diameter of thread forming screws according to load and pilot hole conditions.

Avoid rust, scratches and rework. Learn to select proper washer materials and coatings to cut manufacturing costs for assembly lines.

Prevent nut rust & thread loosening. Select carbon/stainless steel, DIN982/DIN562 nuts from Qewit matching vibration & corrosive working conditions.