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square head bolts
Square Head Bolts Standard: GB: GB/T 8-88, DIN: DIN478, DIN479, DIN480, ANSI: ANSI/ASME B18.2.1, JIS: JIS B1182-1995, As well as BS & the customer incoming samples, drawing carries on production.
Square Head Bolts Specification:
Square Head Bolts Diameter: M6---M64, 1/4"--2-1/2", The length does not limit.
Square Head Bolts Grade: Carries out 4.6, 5.6, 6.8, 8.8, 10.9, 12.9 or Grade 2, Grade 5, Grade 8. . .
Square Head Bolts Finish: plain , Black, Yellow Zinc, White Zinc, The Hot Dipping Zinc, chrome-faced.
(1) using the most sophisticated equipment available, including a state-of-the-art computerized system which produces digitally certified tensile and yield test
(2) Fastener Quality Act and is ISO:9001 certified.
(3) chemical and physical certifications .
(4) material certification report