Gold contact part Zl 99.99 per GOST 25852-83

The item is identified as an electrical contact part made of gold Zl 99.99. GOST 25852-83 applied to contact parts for instrument making, apparatus engineering, and electrical engineering.

Product type

The image shows contact elements but does not define their type and dimensions. GOST 25852-83 has been replaced by GOST 25852-2021; the applicable revision must be explicitly stated in the contract and documentation.

Characteristics

• Type: electrical contact part
• Grade: Zl 99.99
• Document status: GOST 25852-83 replaced by GOST 25852-2021
• Document: GOST 25852-83; current replacement document — GOST 25852-2021

The contact part is a finished technical element by geometry, not just a piece of gold. Operating parameters depend on shape, dimensions, mass, surface, mounting method, and switching mode. Grade Zl 99.99 or Zl 99.9 specifies the material but does not allow selecting a contact without a design designation and drawing. The old GOST has been replaced by the 2021 revision, so the supply document is explicitly fixed.

Applications

• contact assemblies of instruments and apparatus when the designation and operating mode match;
• switching elements after calculating current, contact force, and mounting method;
• repair or serial assembly only according to the drawing and specification of the original part;

What to agree upon when ordering

Specify the contact part designation, shape, dimensions, mass, tolerances, surface roughness, and requirements for the working surface. Agree on mounting, switching mode, quantity, and packaging. The supplier confirms Zl 99.99, quality document, and standard revision. The old designation is checked against the product documentation.

Safety and storage

Contact parts are protected from contamination of the working surface, scratches, and deformation. Installation is performed with clean tools and eye protection; soldering, welding, or mechanical fastening is done according to an approved procedure. Do not test the contact under voltage outside the intended circuit. Scrap and rejected parts are collected separately, and packaging and storage are organized according to the supply document and precious metal accounting rules.