We stock stainless steel bolts in SS304 (A2-70) and SS316 / 316L (A4-80) in Umm Al Quwain from M4 to M42 and ¼" to 1½" — hex, socket, countersunk and special heads — with nuts and washers in matching grade, certified with PMI on request. This is the range specified for marine, coastal, food and architectural work across the GCC.
Stainless steel bolts resist corrosion because the chromium in the alloy forms a self-healing oxide film. A2 (304) is the general-purpose grade; A4 (316) adds molybdenum for resistance to chlorides, seawater and many chemicals. The number after the dash is the tensile strength (70 = 700 MPa, 80 = 800 MPa). Stainless bolts are non-magnetic (austenitic), hygienic and keep their appearance, but are prone to thread galling if tightened dry.
Applications
- Marine, jetty and coastal structures
- Desalination, water and wastewater plants
- Food, beverage and pharmaceutical equipment
- Architectural, façade and balustrade fixings
- Chemical and fertilizer plants
- Swimming pools, spas and hotel installations
Standards, grades & finishes
Bolts to DIN 931 / 933 / 912 / 7991 / ISO 4014 / 4017 / 4762, material to ISO 3506-1 A2-70, A2-80, A4-70, A4-80 (304, 316, 316L to ASTM A193 B8 / B8M where specified), threads ISO 965 6g or UNC. Nuts ISO 4032 / DIN 934 A2 / A4, washers DIN 125A / DIN 127. Plain or passivated; anti-galling lubricant on request.
This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.