Flange bolts have a circular edge under the head that acts like a washer to distribute loads. Standard, non-serrated flange bolts are also called frame bolts. Flange bolts are used in automobiles to secure outer casings protecting engines and transmissions. In plumbing, they secure pipe ends to ensure strong hold, regardless of materials in the ducts. Serrated flange bolts have teeth that grip surfaces for a tight hold. In electronics, flange bolts hold components together tightly to prevent particles from getting into devices. In hard-to-reach areas, flange bolts help install decks and overhead attachments more easily than regular bolts and washers. Long flange bolts are used to construct oil rigs, energy plants, and ships.

304 Chemical Composition(%)
Grade	C≤	Mn≤	Si≤	S≤	P≤	Cr	Ni	N≤
	0.08	2	0.75	0.03	0.045	18.0-20.0	8.0-10.5	0.1

304 Mechanical property
σb≥	σ0.2≥	δ5 (%)≥	Hardness(HB)(kgf/mm2)]
520(Mpa)	205(Mpa)	40%	≤187 HRB≤90 HV ≤200

DIN6921
Screw Thread d	Pitch P			k	s
Screw Thread d	coarse thread	Fine therad-1	Fine thread-2	k	min	max
M6	1	/	/	6.6	9.78	10
M8	1.25	1	/	8.1	12.73	13
M10	1.5	1.25	1	9.2	14.73	15
M12	1.75	1.5	1.25	11.5	15.73	16
M14	2	1.5	/	12.8	17.73	18
M16	2	1.5	/	14.4	20.67	21

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Jiaxing Goshen Hardware CO., LTD is Located at Economic Development Area, Jiaxing City, Zhejiang Province, China. We specialise in suppling kinds of stainless steel, high strength and low carbon steel fasteners with excellent quality and reliable price. Our fasteners according to a number of internationally recognised standards including DIN, ANSI/ASTM, BS, JIS, GB etc.