China Manufacturer High Strength Hex Head Bolt for Steel Structure

• Customization: Available
• Material: Carbon Steel, Stainless Steel, Alloy Steel
• Type: Hexagon Head
• Model NO.: DIN933/DIN931
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: 4.8/8.8/10.9/12.9
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: Black/Yzp/Bzp/HDG/Dacromet/Plain
• Delivery: 5-10 Days in Stock, 10-30 Days Not in Stock
• Head Mark: Customized
• Thread Length: Full Thread/Half Thread
• Size: M3-M100
• Customized: Yes
• Transport Package: Plastic Bags+Cartons+Pallets
• Specification: as Request
• Trademark: LS or Customized
• Origin: Hebei, China
• HS Code: 731815
• Production Capacity: 50 Million Tons/Month
• Package Size: 23.00cm * 11.00cm * 6.00cm
• Package Gross Weight: 30.000kg

Product Description

PRODUCT PARAMETER

HEX BOLT

Fully threaded hex bolts feature threads along the entire shank, maximizing clamping force and load distribution in tensile applications. Unlike partial-thread bolts, their uniform threading allows precise positioning and adjustment during assembly. Common materials include carbon steel (8.8/10.9 grade, zinc-plated), stainless steel (304/316 for corrosion resistance), and alloy steel. Standards like ISO 4017, DIN 933, and ASME B18.2.1 specify sizes from M6 to M64 and lengths up to 300mm. The full threading enhances preload consistency, ideal for applications requiring high tensile strength without shear-dominant loads.

DIN933

Thread size					M1.6	M2	M2.5	M3	(M3.5)
d
P		thread pitch			0.35	0.4	0.45	0.5	0.6
a		Max			1.05	1.2	1.35	1.5	1.8
c		Min			0.1	0.1	0.1	0.15	0.15
		Max			0.25	0.25	0.25	0.4	0.4
da		Max			2	2.6	3.1	3.6	4.1
dw		A	Min		2.4	3.2	4.1	4.6	5.1
		B	Min		-	-	-	-	-
e		A	Min		3.41	4.32	5.45	6.01	6.58
		B	Min		-	-	-	-	-
k		Nominal			1.1	1.4	1.7	2	2.4
		A	Min		0.98	1.28	1.58	1.88	2.28
			Max		1.22	1.52	1.82	2.12	2.52
		B	Min		-	-	-	-	-
			Max		-	-	-	-	-
k1		Min			0.7	0.9	1.1	1.3	1.6
r		Min			0.1	0.1	0.1	0.1	0.1
s		Max=Nominal			3.2	4	5	5.5	6
		A	Min		3.02	3.82	4.82	5.32	5.82

Thread size					(M18)	M20	(M22)	M24	(M27)
d
P		thread pitch			2.5	2.5	2.5	3	3
a		Max			7.5	7.5	7.5	9	9
c		Min			0.2	0.2	0.2	0.2	0.2
		Max			0.8	0.8	0.8	0.8	0.8
da		Max			20.2	22.4	24.4	26.4	30.4
dw		A	Min		25.3	28.2	30	33.6	-
		B	Min		24.8	27.7	29.5	33.2	38
e		A	Min		30.14	33.53	35.72	39.98	-
		B	Min		29.56	32.95	35.03	39.55	45.2
k		Nominal			11.5	12.5	14	15	17
		A	Min		11.28	12.28	13.78	14.78	-
			Max		11.72	12.72	14.22	15.22	-
		B	Min		11.15	12.15	13.65	14.65	16.65
			Max		11.85	12.85	14.35	15.35	17.35
k1		Min			7.8	8.5	9.6	10.3	11.7
r		Min			0.6	0.8	0.8	0.8	1
s		Max=Nominal			27	30	32	36	41
		A	Min		26.67	29.67	31.61	35.38	-

ABOUT US

LONGSHI FASTENERS MANUFACTURING CO.,LTD.,

Longshi Fastener Manufacturing Co., Ltd., founded in 2008, is located in Shahe City, Hebei Province, close to the country's largestLarge fastener industrial cluster - Yongnian standard parts Industrial Park. The company headquarters covers an area of 21 thousand square meters, the annual output value of 200 million yuan, with more than 200 employees, with domestic More than 100 sets of advanced production equipment. It is a "manufacturing + service" type enterprise integrating fastener production, intelligent warehousing and e-commerce sales. The company's construction of the sea screw e-commerce park is located in Yongnian District, Handan City, Hebei Province, covers an area of 45 acres, the park planning and construction of office area, production area, packaging area, storage area, etc., to provide fastener production, packaging, warehousing, e-commerce sales and other services. Longshi mainly produces high quality and high strength fasteners, and "Longshi" screws have become a well-known brand in the industry. Longshi always adhere to quality first, reputation first. From raw material procurement, design and development, production and processing to products strict quality control is implemented in every link of quality testing and sales to win the recognition of our customers. The company has established standardized product testing laboratories and quality testing processes and standards to ensure that products strictly comply with national standards.

FAQ

Q1: What is your minimum order quantity (MOQ)? Do you charge extra for small orders?
100 pieces MOQ (most peers require 1,000+), no price premium for small orders. First-time customers for cross-border e-commerce/trade get free samples.
Q2:Do you support custom orders? How long does the customization process take?
Longshi Advantage: 8-dimensional customization (material, specification, surface treatment, etc.), with 3D design drawings + process plans.
Q3: What if an item is out of stock?
Stockout rate <0.1% (peers: 10+%), with real-time inventory monitoring. For extreme stockouts, free upgraded alternatives are provided (peers often leave clients waiting indefinitely).
Q4: Do you provide technical support, such as installation guidance or drawing optimization?
Dedicated 1v1 engineer team offering free technical support.
Q5:Can I visit your factory or arrange a factory audit?
Support online factory tours (real-time video of production lines/laboratories) and offline visits (pick-up service available).