Ama-fasteners ensimbi ye-carbon ajwayele ukuhlanganiswa nge-PTFE yezimboni (emfushane ye-polytetrafluoroethylene) kuzinhlelo zokusebenza ezidinga amandla aphezulu nokuphikiswa kokugqwala futhi asebenza ngokomnotho. I-Sae-Aisi 1018, 1020, 1045 \
CK45 amamaki ajwayelekile e-carbon asetshenziselwa ukukhiqiza la ma-fasteners. Ukucaciswa Kwezimboni okufana ne-ASTM A36, A193, A194, A154, A554, A540, A540, A540, A540, A540, A549, F1554 no-SAE J429 amboza ama-High Carbon Carbon Carnon Tecker Amabanga.