1. The full document set for a batch
Three documents must arrive with every fastener batch: a quality passport (from the manufacturer, with the heat marking and the QC date), a certificate of conformity (Rosstandart or a TR CU declaration), and a delivery note linking the batch to the heat number. If even one document is missing, the batch is not accepted on critical projects.
2. Batch marking in the passport
The passport must contain: the steel heat number, the production date, the property class, the chemical composition, and the results of mechanical testing (tensile strength, yield strength, elongation, hardness). If the passport states only the property class and nothing more, it is a “general formality”, not a batch passport.
3. Certificate of conformity and declaration
Mandatory certification applies to fasteners in construction and heavy industry. The document is issued by an accredited body, each of which has an accreditation certificate number. A declaration of conformity to TR CU 010 — for machine building and industrial equipment.
4. Signs of a counterfeit
- A stamp without the certification body spelled out.
- An INN under which the company is not listed in the Unified State Register of Legal Entities.
- A certificate number absent from the Rosstandart register.
- The validity period has expired, or the issue date is later than the batch’s production date.
The check takes 5 minutes on reestr.gost.ru — do it for every delivery from a new seller.
5. Incoming inspection on site
For load-bearing structures — sampling per GOST 18321 (3–5% of the batch). What to check: the marking on the head, the diameter and thread pitch with a gauge, and hardness with an instrument. A full laboratory tensile test — for critical connections, under a separate contract with a testing laboratory.
Want to see the documents in advance? A manager will send scans of the quality passport and the certificate before shipment — you will have time to verify them against the register before the truck arrives.