Metric Stainless Hex Bolt 304-A2 DIN 933-931

stainless 304-A2 DIN 933/931 hex bolt is a hex head bolt for large-diameter metric joints in environments requiring corrosion resistance and stainless compatibility. At TECTUL it is quoted per unit and by actual available size, cross-checking diameter, length, pitch, material, finish and standard before confirming price. This reference is differentiated by mixed DIN 933 and DIN 931 references in M27 and M30 sizes; full or partial thread must be validated when quoting. The material reported for the lot is 304-A2 stainless steel. For class 8.8, 10.9 and SAE grades, selection must respect the requested mechanical property; for DIN 933, DIN 931, DIN 960 or DIN 961, full, partial, standard or fine thread geometry is validated according to the drawing. For ASTM A325, A490 or A394, the project standard defines bolt, nut, washer and assembly. We do not publish single torque or load values because they depend on lubrication, coating, grip length, thread condition and engineering criteria.

Installation recommendations

• Avoid contaminating stainless steel with carbon steel; use a compatible nut and consider suitable lubrication to reduce galling.
• Clean threads, holes and bearing surfaces before assembly to avoid false tightening.
• Do not mix metric thread with UNC or UNF; if in doubt, compare against a sample, drawing or thread gauge.
• Apply the torque or tightening method defined by engineering, considering lubrication and coating condition.
• Check grip length and remaining thread so the joint clamps on the parts, not on the thread end.

We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp for this stainless 304-a2 din 933/931 hex bolt, indicating size, quantity, pitch, finish and whether you need a compatible nut or washer.