Description:

TRB RC M3 - 0. 5 x 18mm ( SHC ) Socket Head CScrew 10pcs Class 12. 9 Hard Alloy Steel. Specifications: Unit of Measure / Metric mm Material / Alloy Steel Grade / Class 12. 9 Specification / DIN 912 - ISO 4762 Tensile Strength / 1220N/mm minimum Proof Strength / 1100N/mm minimum Hardness / HRC 39-44 Head Type / Socket Cap Drive Type / Hex Socket Thread & Pitch Size (mm) / M3-0. 5 Length (mm) / 18mm Color / Black Length Measurement Type / Length Under Head Hex Key Size (inch) / 2. 5mm Features: Externally threaded fastener with metric threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides and hex agonal recess, made from alloy steel. Class 12. 9 socket cscrews are comparable, but not e x actly equivalent to U. S. alloy steel socket cscrews. Ideal for precision assembly work with close tolerances and applications needing a well-tooled appearance. Supplies greater tensile strength than equivalent sizes of Class 8. 8 or 10. 9 hex head cscrews while requiring less surfarea or conterbore since the fastener is internally wrenched. Class 12. 9 socket cscrews shall be made from an alloy steel which conforms to the following chemical composition requirements - Carbon: 0. 20-0. 50%; Phosphorous: 0. 035% ma x imum; Sulfur: 0. 035% ma x imum; and one or more of chromium, nickel, molybdenum or vanadium.