DIN976 8.8-Grade High-Strength Double-End Bolts Threaded Studs Zinc Finish Black Heavy Industry Use 3-Year Warranty OEM

Product Description

PRODUCT PARAMETER

Double End Studs

Double-ended studs (or double-ended bolts) are headless fasteners with threads at both ends, used to hold components between two nuts. Its rod part (without threads or partially threaded) can withstand tensile loads, while the threaded end can achieve precise clamping. Its materials include carbon steel (grade 8.8/10.9, galvanized), stainless steel (316 stainless steel, corrosion-resistant) and alloy steel. Standards such as DIN 975, ISO 8734 and ASME B18.31.2 stipulate that its size range is from M6 to M100, and the length can reach 1,000 millimeters. This design does not require bolt heads, saves space and makes it convenient to replace nuts.
 
Application:
 
Pressure vessels/pipelines: Flanges for fixing boilers, reactors or high-pressure pipelines (resisting thermal expansion and vibration).
 
Engine machinery: Fixing the cylinder head, valve cover or gearbox of a car/diesel engine (bearing cyclic loads).
 
Heavy equipment: Connect gearboxes, generators or pumps in construction machinery (maintenance can be carried out without disassembling the entire system).
 
Electrical/Marine: Install transformers or hull components in corrosive environments (stainless steel materials can prevent rusting).
 
Industrial fixtures: Modular frames, conveyor belts or scaffolding that require repeated adjustments for assembly.

Doutlr end stud

Thread Spec		M2	M2.5	M3	M4	M5	M6	M8	M10
d
P	thread pitch	0.4	0.45	0.5	0.7	0.8	1	1.25	1.5
Thread Spec		M20	(M22)	M24	(M27)	M30	(M33)	M36	(M39)
d
P	thread pitch	2.5	2.5	3	3	3.5	3.5	4	4

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).