China DIN6921 Serrated Head Flange Bolt Stainless Steel 304 316 manufacturers and suppliers

DIN6921 Serrated Head Flange Bolt Stainless Steel 304 316

Short Description:

Standard: DIN6921

Product Name: Flange Bolt

Key Words: DIN6921, Flange Bolt, Serrated Head Flange Bolt

Size: M3-M42

Material: SUS304, SUS316

Stength Grade: A2-70, A4-80

Surface Treatment: Plain stainless steel color

Thread Length: Full Thread/ Half Thread

Packing: Bag/Carton/Wooden case

Other Features: Offer customized head mark

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d			M5	M6	M8	M10	M12	M14	M16	M20
P	Pitch	Coarse	0.8	1	1.25	1.5	1.75	2	2	2.5
		Fine thread1	/	/	1	1.25	1.5	1.5	1.5	1.5
		Fine thread2	/	/	/	1	1.25	/	/	/
b	L≤125		16	18	22	26	30	34	38	46
	125＜L≤200		/	/	28	32	36	40	44	52
	L＞200		/	/	/	/	/	/	57	65
c	Min		1	1.1	1.2	1.5	1.8	2.1	2.4	3
da	Type A	Max	5.7	6.8	9.2	11.2	13.7	15.7	17.7	22.4
da	Type B	Max	6.2	7.4	10	12.6	15.2	17.7	20.7	25.7
dc	Max		11.8	14.2	18	22.3	26.6	30.5	35	43
ds	Max		5	6	8	10	12	14	16	20
ds	Min		4.82	5.82	7.78	9.78	11.73	13.73	15.73	19.67
du	Max		5.5	6.6	9	11	13.5	15.5	17.5	22
dw	Min		9.8	12.2	15.8	19.6	23.8	27.6	31.9	39.9
e	Min		8.71	10.95	14.26	16.5	17.62	19.86	23.15	29.87
f	Max		1.4	2	2	2	3	3	3	4
k	Max		5.4	6.6	8.1	9.2	11.5	12.8	14.4	17.1
k1	Min		2	2.5	3.2	3.6	4.6	5.1	5.8	6.8
r1	Min		0.25	0.4	0.4	0.4	0.6	0.6	0.6	0.8
r2	Max		0.3	0.4	0.5	0.6	0.7	0.9	1	1.2
r3	Min		0.1	0.1	0.15	0.2	0.25	0.3	0.35	0.4
r4	≈		3	3.4	4.3	4.3	6.4	6.4	6.4	8.5
s	Max=Nominal		8	10	13	15	16	18	21	27
s	Min		7.78	9.78	12.73	14.73	15.73	17.73	20.67	26.67

Detail description

Flange bolt An integral bolt consisting of hexagon head and flange (hexagon gasket and hexagon socket fixed together) and screw (cylinder with external thread), which should be matched with a nut to fasten the part connecting two through holes.

1. Hexagonal head type: one is flat head, the other is concave head.
2. Surface color category: according to different needs, the surface is plated white, military green, color yellow, corrosion resistant Dacromet.
3, flange type: according to the use of flange bolts in different positions, the size of the disk requirements are different, and there are also flat bottom and serrated bottom, tooth with anti-slip effect.
4. According to the force mode of connection, there are ordinary and hinged holes. Flange bolts for reaming holes should match the size of the holes and be used when subjected to transverse forces.
In addition, in order to meet the needs of locking after installation, there are holes in the rod parts, which can make the bolts not loose when subjected to vibration.
Some flange bolts have no thread of the bare rod part to do, called thin rod flange bolts. This type of flange bolt facilitates coupling under variable forces.

Flange bolt is composed of hexagonal head and flange plate, its "support area to stress area word ratio" is greater than the ordinary bolt, so this bolt can bear higher preload, anti-loose performance is also better, so it is widely used in automobile engines, heavy machinery and other products.