For API 5CT tubing couplings & casing couplings, the specifications are from 2-3/8 to “20″, and the steel grade is from J55 to Q125, covering all full series and steel grades.
1. QUANTITY  TOLERANCE:-0/ +5% in PCS per size and in total.
2. INVOICING:  Based on actual quantity shipped.
3. Coupling Must Be Manganese Phosphate Coated as Per API 5B,Coupling  Surface colour coating as per API 5CT 9th or  API 5CT 10th.
4. Coupling Die-Stamping  and surface marking : XZEP 5CT-1368 [API Monogram]or XZEP 5CT-1925 [API Monogram]or the customer designated Marking, Date, size,  grade,  connection type, heat no. lot no.
5. PACKAGING: Palletized, wood must comply with ISPM 15,Wrapped with plastic film ,packed with plastic-steel strip.
6. PAYMENT  TERM: 30% prepayment via T/T within 3 days after contract signed, and 70% balance via T/T  within 7 days against  copy of Shipping Docs. Or 30% prepayment and 70% Irrevocable L / C at sight. Or 100% Irrevocable L / C at sight. The payment method is very flexible and can be negotiated and agreed.