Wholesale High Strength DIN 6921 Carbon Steel Black Hexagon Hex Head Flange Bolt Supplier

• Customization: Available
• Material: Carbon Steel
• Type: Hexagon Head
• Model NO.: DIN 6921
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW, GOST, ISO
• Grade: 10.9
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: Black
• Thread: Unc, Unf, Un, Metric Coarse, Fine
• Surface: Plain, Zinc Plated (Blue, White, Black, Yellow), N
• Quality: 100% Tested
• Price: Factory Price
• Lead Time: 15-30 Days
• Package: Standard Package or Customer's Packing
• Box: Customer's Brand Box/Plain Box
• MOQ: Can Be Negotiated
• Shipment: by Sea / Truck / Plane / Express
• Exterior Finish: Cuotomized
• Sample: Available
• Customized: Available
• Service: One-Stop Service
• Online Sales: 24 Hours Online
• OEM/ODM: Available
• Transport Package: Bulk Packaging, Small Box(Glue Box, Color Box)
• Specification: M5-M20
• Trademark: Mianxuan, Customized
• Origin: Ningbo Zhejiang
• HS Code: 7318151001
• Production Capacity: 100tons/Month
• Package Size: 10.00cm * 10.00cm * 5.00cm
• Package Gross Weight: 0.400kg

Product Description

Wholesale High Strength DIN 6921 Carbon Steel Black Hexagon Hex Head Flange Bolt Supplier

DIN6921 Hex Head Flange Bolt
Material:	Carbon Steel, Stainless Steel, Brass etc.
Standards:	GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS, ETC
Size:	M5-M20 or non-standard asa request & design
Finish:	Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc.

Screw Thread
d

M5

M6

M8

M10

M12

M14

M16

M20

P		Pitch	Coarse thread
			Fine thread-1
			Fine thread-2
b		L≤125
		125
		L>200
c		min
da		Form A	max
		Form B	max
dc		max
ds		max
		min
du		max
dw		min
e		min
f		max
k		max
k1		min
r1		min
r2		max
r3		min
r4		≈
s		max=nominal size
		min
t		max
		min

0.8	1	1.25	1.5	1.75	2	2	2.5
/	/	1	1.25	1.5	1.5	1.5	1.5
/	/	/	1	1.25	/	/	/
16	18	22	26	30	34	38	46
/	/	28	32	36	40	44	52
/	/	/	/	/	/	57	65
1	1.1	1.2	1.5	1.8	2.1	2.4	3
5.7	6.8	9.2	11.2	13.7	15.7	17.7	22.4
6.2	7.4	10	12.6	15.2	17.7	20.7	25.7
11.8	14.2	18	22.3	26.6	30.5	35	43
5	6	8	10	12	14	16	20
4.82	5.82	7.78	9.78	11.73	13.73	15.73	19.67
5.5	6.6	9	11	13.5	15.5	17.5	22
9.8	12.2	15.8	19.6	23.8	27.6	31.9	39.9
8.71	10.95	14.26	16.5	17.62	19.86	23.15	29.87
1.4	2	2	2	3	3	3	4
5.4	6.6	8.1	9.2	11.5	12.8	14.4	17.1
2	2.5	3.2	3.6	4.6	5.1	5.8	6.8
0.25	0.4	0.4	0.4	0.6	0.6	0.6	0.8
0.3	0.4	0.5	0.6	0.7	0.9	1	1.2
0.1	0.1	0.15	0.2	0.25	0.3	0.35	0.4
3	3.4	4.3	4.3	6.4	6.4	6.4	8.5
8	10	13	15	16	18	21	27
7.78	9.78	12.73	14.73	15.73	17.73	20.67	26.67
0.15	0.2	0.25	0.3	0.35	0.45	0.5	0.65
0.05	0.05	0.1	0.15	0.15	0.2	0.25	0.3

don't hesitate to get in touch with us
 

: DIN933, DIN931, DIN912, DIN603, DIN7985, DIN7991, DIN6921, ASME/ANSI B 18.2.1, ASME/ANSI B18.2.3.1 M, GB, BSW, ISO Hex bolt, carriage bolt, heavy hex bolt, flange head bolt, anchor bolt, etc

: DIN934, DIN6923, DIN985, ISO4032 hex heavy hex nut, 2H nut, A563 / A563M cap nut, nylon nut, etc

: threaded rod DIN975,DIN976, threaded bar DIN975 stud bolt, B7 stud bolt ect

: hex screw, DIN912; self-drilling screw, DIN7504; self-tapping screw, DIN7981/7982; drywall screw, pan head screw, button head screw, machine screw, chipboard screw, furniture screw, wood screw, etc

: flat washer DIN125, spring washer DIN127, lock washer, square washer, spring lock washer, plain washer, etc

Main Products

 

Product Description

Company Profile

Our Workshop

Certifications

EXHIBITION DISPLAY

 

DELIVERY&PAYMENT

FAQ

Q1: What types of screws do you manufacture?

A1: We produce a full range of industrial screws including self-tapping screws, self-drilling screws, machine screws, wood screws, drywall screws, concrete screws, and customized non-standard screws.

Q2: What materials are available for your screws?

A2: Our screws are available in carbon steel (C1022, C1018), stainless steel (A2/304, A4/316), hardened steel, alloy steel, and brass.
Material selection depends on tensile strength and corrosion-resistance requirements.

Q3: Do you provide samples before mass production?

A3: Yes, we offer free or low-cost samples for quality and dimension confirmation prior to order.

Q4: How do you control product quality?

A4: Every batch is tested for torque, hardness, thread precision, and salt spray corrosion resistance, following ISO 9001 quality system standards.

Q5: Do you offer OEM or customized production?

A5: Yes. We can produce screws according to samples, technical drawings, or specific drive/head combinations, and offer custom packaging and labeling.

Q6: What is the tolerance and precision level of your threads?

A6: We use automated thread rolling with precision tooling.
Thread tolerance typically meets 6g / 6H and can be customized for special fitting requirements.

Q7: Will stainless steel bolts rust over time?

A7: Under severe chemical or chloride exposure, A2 may develop slight surface corrosion. A4/316 performs better in harsh environments. We also offer passivation treatment for enhanced protection.