China Fasteners Hardware Grade 8.8 Stainless Steel Carbon Steel Hexagon DIN931/DIN933 M6 Hex Head Bolt Bouten Tuerca Perno

• Customization: Available
• Material: Carbon Steel, Stainless Steel, Alloy Steel
• Type: Hexagon Head
• Model NO.: 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: 24.40cm * 12.00cm * 12.00cm
• Package Gross Weight: 30.000kg

Product Description

PRODUCT PARAMETER

SEMI-THREADED BOLT

Partial thread bolts (semi-threaded bolts) feature threading only on part of the shank, with a smooth unthreaded section designed to bear shear loads. This design optimizes stress distribution: the threaded portion resists tensile forces, while the shank withstands lateral stress. Common materials include carbon steel (8.8/10.9 grade, zinc-plated for corrosion resistance), stainless steel (304/316), and alloy steel. Standards like DIN 931, ISO 4014, and ASME B18.2.1 specify sizes from M6 to M100, with thread lengths typically 2d–3d (d = diameter) and shank lengths up to 500mm.

DIN931

Thread Spec		(M68)	M72	(M76)	M80	M90	M100	M110	M125
d
P	thread pitch	6	6	6	6	6	6	6	6
b	125<L≤200	148	156	164	172	192	-	-	-
	L<200	161	169	177	185	205	225	245	275
c	Min	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4
	Max	1	1	1	2	2	2	2	2
da	Max	75	79	83	87	97	107	117	132
ds	Max=Nominal	68	72	76	88	90	100	110	125
	Min	67.26	71.26	75.26	79.26	89.13	99.13	109.13	124
dw	Min	92.9	97.7	102.1	106.9	121.1	135.4	144.9	168.6
e	Min	110.51	116.16	121.81	127.46	144.08	161.02	172.32	200.57
k	Nominal	43	45	48	50	57	63	69	79
	Min	42.5	44.5	47.5	49.5	56.4	62.4	68.4	78.4
	Max	43.5	45.5	48.5	50.5	57.6	63.6	69.6	79.6
k1	Min	29.8	31.2	33.2	34.6	40.3	43.7	47.9	54.9
r	Min	2	2	2	2	2.5	2.5	2.5	2.5
s	Max=Nominal	100	105	110	115	130	145	155	180
	Min	97.8	102.8	107.8	112.8	127.5	142.5	152.5	177.5

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.