Stainless Steel Cap Nut

Dazhe’s China Stainless Steel Cap Nut are industrial fasteners that take hexagonal nuts as the main body and are equipped with a sealing cap structure on the top, which are mainly used to prevent moisture or corrosive substances from invading the internal threads. The applicable standard systems include national standards such as the GB/T 802 series and GB/T 923, as well as international standards such as DIN 1587 and DIN 986. The products are made of carbon steel with galvanized finish or stainless steel, and achieve anti-corrosion performance through the dual structure of sealing cap and anti-rust sleeve. The thread specifications cover the range of M3 to M20, and some models are configured with anti-slip grooves and self-locking structures to enhance fastening reliability.

Our stainless steel cap nut mainly plays the following roles in the industrial field:

1.Sealing and Protection: The closed end cap prevents moisture and dust from entering the thread interior.

2.Safety and Anti-loosening: Some models increase friction through anti-slip grooves, and the patented expansion-tightening structure can generate continuous radial pressure to prevent loosening [2].

3.Appearance Enhancement: When used on the exposed fastening parts of equipment, it can make the overall layout of the equipment more neat and uniform, and enhance the overall aesthetic of the equipment.

The product specifications cover the following technical parameters:

Thread Size: Nominal diameter ranges from M3 to M20, with a pitch of 0.5–2.5 mm.

Strength Grade: The stainless steel grade A2-70 corresponds to a tensile strength of 700 MPa; the carbon steel grade 8.8 corresponds to a tensile strength of 800 MPa.

Fit Precision: The 6G class thread meets the requirements of medium-precision fit scenarios.

Certification Standard: Compliant with the RoHS Directive’s environmental requirements for heavy metal content.