Products Description

Stainless steel double-ended screws are bolts with threads at both ends and no threads in the center, usually made of stainless steel. The design of the double-ended thread gives it a unique advantage in connection or fastening operations, allowing simultaneous nut screwing operations from both ends of the screw, which facilitates the adjustment and fastening of different components in some specific installation scenarios. Pay attention to the direction of the threads when using it. The thread direction of the two ends of the double-ended screw may be different, usually one end is right-handed and the other end is left-handed.

Parameter

Executive Standard	DIN835
Official Name	Stainless steel double head screw
Alias	Double head bolts, Double Ended Studs
Raw Material	304 Stainless Steel, 316 Stainless Steel
Strength Grade	A2-70 (304), A4-70 (316)
Nominal Diameter Range	M2 – M48
Thread Pitch	0.4mm – 5mm, coarse/fine thread customizable, left-right reverse thread optional
Surface Treatment	Passivated, Polished
Core Structure	Threaded ends on both sides, smooth non-thread central shank

Product Advantages

Double-Ended Thread Design

Stainless Steel Double-Ended Studs are ideal for assembling thick plates, flanges, and deep cavities. The smooth shank in the middle ensures coaxial alignment, prevents deflection during tightening, and guarantees the sealing integrity of pipe flanges and pressure vessels.

Corrosion Resistance

The stainless steel base material, combined with passivation and polishing surface treatments, completely eliminates oxidation and corrosion-related failures. The passivation process forms a dense, inert protective film that extends salt spray resistance; mirror polishing meets the hygiene and cleanliness requirements for food, medical, and pharmaceutical production equipment, effectively preventing the adhesion of stains and bacteria.

High-Precision Thread Machining

Utilizing a specialized thread rolling process, the thread profile is uniform with tight dimensional tolerances. Nuts tighten smoothly without seizing or slipping; thread engagement remains stable under repeated assembly and disassembly, vibration, and thermal expansion, preventing connection loosening.

High Standard Interchangeability

Covering applications ranging from miniature M2 precision instrument assemblies to heavy-duty M48 high-load structural connections, these screws fully comply with the DIN 835 dimensional tolerance standard and are interchangeable with standard nuts and threaded components worldwide.

Quality Assurance

Quality Assurance

Each batch of products undergoes raw material composition testing, tensile strength testing, thread accuracy testing, salt spray corrosion testing, and surface quality inspection to ensure compliance with the DIN 835 standard. Customization options include fine-pitch specifications, unequal-length threads on both ends, left- and right-hand threads, laser-etched branding, and OEM export packaging.

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