{"product_id":"hexagon-head-bolts-din-931-stainless-steel-grade-18-8-a2-304-m18-x-70-mm","title":"Hexagon Head Bolts - DIN 931, Stainless Steel, Grade 18\/8 - (A2) 304, M18 X 70 mm","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eDIN 931 defines a hexagon head bolt with a partially threaded shank. The standard covers the dimensional form of the bolt, including the hex head, threaded portion and plain shank, so that the fastener can be selected consistently by diameter, length and thread. The partially threaded design is useful where the smooth shank should pass through the joint to improve alignment and carry shear loads, while the threaded section provides the clamping force.\u003c\/p\u003e\u003cp\u003eThis selected size is specified with diameter M18, length 70 mm, thread M18, pitch 2.5 mm.\u003c\/p\u003e\u003cp\u003eSold in multiples of '10 pieces. 1 Box = '10 pieces.\u003c\/p\u003e\u003ch3\u003eMaterial, Grade \u0026amp; Strength\u003c\/h3\u003e\u003cp\u003eA2 stainless steel, commonly associated with 304 stainless, provides good general corrosion resistance for outdoor, clean industrial and food-related environments. A2 stainless is often chosen where rust resistance is more important than the higher tensile strength of carbon steel grades. Stainless fasteners can gall during tightening, so suitable anti-seize or lubrication may be required.\u003c\/p\u003e\u003ch3\u003eFinish \u0026amp; Corrosion Protection\u003c\/h3\u003e\u003cp\u003eStainless products rely on the corrosion resistance of the stainless material itself rather than a separate plated coating.\u003c\/p\u003e\u003ch3\u003eTypical Uses\u003c\/h3\u003e\u003cp\u003eDIN 931 bolts are commonly used in machinery, fabricated steelwork, mining equipment, agricultural equipment, brackets, frames and maintenance work where a strong partially threaded bolt is preferred over a fully threaded set screw.\u003c\/p\u003e\u003ch3\u003eTechnical Tips\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse a matching nut and washer of the same thread size and suitable strength class.\u003c\/li\u003e\n\u003cli\u003eWhere possible, position the plain shank through the shear plane of the joint rather than leaving threads in the shear area.\u003c\/li\u003e\n\u003cli\u003eFor Grade 8.8, 10.9 or 12.9 bolts, use correctly rated mating nuts and washers.\u003c\/li\u003e\n\u003cli\u003eTorque values vary by diameter, pitch, finish and lubrication; always confirm the correct torque before use in safety-critical assemblies.\u003c\/li\u003e\n\u003cli\u003eFor corrosion-sensitive applications, match the finish or material to the environment rather than relying only on strength grade.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSelection Advice\u003c\/h3\u003e\u003cp\u003eChoose DIN 931 when the joint benefits from a partially threaded shank. Choose DIN 933 when a fully threaded hexagon head set screw is required. Confirm diameter, length, thread, material, finish and grade before ordering.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between DIN 931 and DIN 933?\u003c\/strong\u003e DIN 931 is partially threaded, while DIN 933 is fully threaded. DIN 931 is often preferred where the plain shank assists alignment or shear performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Grade 8.8 stainless steel?\u003c\/strong\u003e No. Grade 8.8 normally refers to high tensile carbon-alloy steel. Stainless fasteners are usually specified by A2, A4 or a stainless property class.\u003c\/p\u003e\n\u003cdiv class=\"screwman-datasheet\"\u003e\n\u003ch3\u003eData Sheet\u003c\/h3\u003e\n\u003cp\u003e\u003ca title=\"Download Data Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/4875\/0576\/files\/51000B.PDF\" target=\"_blank\" rel=\"noopener\"\u003eDownload Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cobject style=\"min-height: 120vh; width: 100%;\" data=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/4875\/0576\/files\/51000B.PDF#zoom=125\" type=\"application\/pdf\" width=\"100%\" height=\"700\"\u003e\u003cembed src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0833\/4875\/0576\/files\/51000B.PDF\" type=\"application\/pdf\"\u003e\u003c\/object\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SM-SPEC START --\u003e\n\u003cdiv class=\"screwman-description screwman-spec-block\" data-standard=\"DIN 931\" data-size=\"M18 x 70\"\u003e\n\u003ch3\u003eDimensions – DIN 931 \/ ISO 4014 M18 x 70\u003c\/h3\u003e\n\u003ctable class=\"screwman-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003ctd\u003eDIN 931 \/ ISO 4014\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003ctd\u003eHexagon head bolt, part thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread\u003c\/th\u003e\n\u003ctd\u003eM18 x 2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength (l)\u003c\/th\u003e\n\u003ctd\u003e70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAcross flats (s)\u003c\/th\u003e\n\u003ctd\u003e27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead height (k)\u003c\/th\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread length (b)\u003c\/th\u003e\n\u003ctd\u003e42 mm (ref.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStress area (As)\u003c\/th\u003e\n\u003ctd\u003e192.5 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (calculated)\u003c\/th\u003e\n\u003ctd\u003e184.09 kg per 1 000 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eMaterial, Grade \u0026amp; Strength\u003c\/h3\u003e\n\u003ctable class=\"screwman-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless steel A2 (304)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSteel grade\u003c\/th\u003e\n\u003ctd\u003eAISI 304 (1.4301)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eC max 0.07%, Cr 17.5-19.5%, Ni 8.0-10.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty class\u003c\/th\u003e\n\u003ctd\u003eA2-70 (ISO 3506) unless marked -80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile strength Rm (min)\u003c\/th\u003e\n\u003ctd\u003e700 MPa (class 70), 800 MPa (class 80)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eYield Rp0.2 (min)\u003c\/th\u003e\n\u003ctd\u003e450 MPa (class 70), 600 MPa (class 80)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical use\u003c\/th\u003e\n\u003ctd\u003egeneral corrosion resistance, indoor\/outdoor, food equipment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eFinish \u0026amp; Corrosion Protection\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePlain \/ self colour:\u003c\/strong\u003e No applied coating. Stainless, brass and nylon parts are supplied plain; plain steel parts need oil, paint or protected environments.\u003c\/p\u003e\n\u003cdetails class=\"sm-spec-datasheet\"\u003e\u003csummary\u003eDIN 931 data sheet – all sizes\u003c\/summary\u003e\n\u003ctable class=\"screwman-spec-table screwman-datasheet-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eThread\u003c\/th\u003e\n\u003cth\u003eAcross flats (s)\u003c\/th\u003e\n\u003cth\u003eHead height (k)\u003c\/th\u003e\n\u003cth\u003eThread length (b)\u003c\/th\u003e\n\u003cth\u003eStress area (As)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003eM3 x 0.5\u003c\/td\u003e\n\u003ctd\u003e5.5 mm\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003ctd\u003e12 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e5.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003eM4 x 0.7\u003c\/td\u003e\n\u003ctd\u003e7 mm\u003c\/td\u003e\n\u003ctd\u003e2.8 mm\u003c\/td\u003e\n\u003ctd\u003e14 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e8.8 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003eM5 x 0.8\u003c\/td\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003ctd\u003e16 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e14.2 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003eM6 x 1\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003ctd\u003e18 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e20.1 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM7\u003c\/td\u003e\n\u003ctd\u003eM7 x 1\u003c\/td\u003e\n\u003ctd\u003e11 mm\u003c\/td\u003e\n\u003ctd\u003e4.8 mm\u003c\/td\u003e\n\u003ctd\u003e20 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e28.9 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003eM8 x 1.25\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003e5.5 mm\u003c\/td\u003e\n\u003ctd\u003e22 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e36.6 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003eM10 x 1.5\u003c\/td\u003e\n\u003ctd\u003e17 mm (ISO: 16 mm)\u003c\/td\u003e\n\u003ctd\u003e7 mm\u003c\/td\u003e\n\u003ctd\u003e26 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e58.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003eM12 x 1.75\u003c\/td\u003e\n\u003ctd\u003e19 mm (ISO: 18 mm)\u003c\/td\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003ctd\u003e30 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e84.3 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003eM14 x 2\u003c\/td\u003e\n\u003ctd\u003e22 mm (ISO: 21 mm)\u003c\/td\u003e\n\u003ctd\u003e9 mm\u003c\/td\u003e\n\u003ctd\u003e40 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e115.4 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003eM16 x 2\u003c\/td\u003e\n\u003ctd\u003e24 mm\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003ctd\u003e44 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e156.7 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"screwman-current-size\"\u003e\n\u003ctd\u003eM18\u003c\/td\u003e\n\u003ctd\u003eM18 x 2.5\u003c\/td\u003e\n\u003ctd\u003e27 mm\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003ctd\u003e48 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e192.5 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003eM20 x 2.5\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003ctd\u003e13 mm\u003c\/td\u003e\n\u003ctd\u003e52 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e244.8 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM22\u003c\/td\u003e\n\u003ctd\u003eM22 x 2.5\u003c\/td\u003e\n\u003ctd\u003e32 mm (ISO: 34 mm)\u003c\/td\u003e\n\u003ctd\u003e14 mm\u003c\/td\u003e\n\u003ctd\u003e69 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e303.4 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003eM24 x 3\u003c\/td\u003e\n\u003ctd\u003e36 mm\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003ctd\u003e73 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e352.5 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM27\u003c\/td\u003e\n\u003ctd\u003eM27 x 3\u003c\/td\u003e\n\u003ctd\u003e41 mm\u003c\/td\u003e\n\u003ctd\u003e17 mm\u003c\/td\u003e\n\u003ctd\u003e79 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e459.4 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM30\u003c\/td\u003e\n\u003ctd\u003eM30 x 3.5\u003c\/td\u003e\n\u003ctd\u003e46 mm\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003ctd\u003e85 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e560.6 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM33\u003c\/td\u003e\n\u003ctd\u003eM33 x 3.5\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003ctd\u003e21 mm\u003c\/td\u003e\n\u003ctd\u003e91 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e693.6 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM36\u003c\/td\u003e\n\u003ctd\u003eM36 x 4\u003c\/td\u003e\n\u003ctd\u003e55 mm\u003c\/td\u003e\n\u003ctd\u003e23 mm\u003c\/td\u003e\n\u003ctd\u003e97 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e816.7 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM39\u003c\/td\u003e\n\u003ctd\u003eM39 x 4\u003c\/td\u003e\n\u003ctd\u003e60 mm\u003c\/td\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003ctd\u003e103 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e975.8 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM42\u003c\/td\u003e\n\u003ctd\u003eM42 x 4.5\u003c\/td\u003e\n\u003ctd\u003e65 mm\u003c\/td\u003e\n\u003ctd\u003e26 mm\u003c\/td\u003e\n\u003ctd\u003e109 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e1120.9 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM45\u003c\/td\u003e\n\u003ctd\u003eM45 x 4.5\u003c\/td\u003e\n\u003ctd\u003e70 mm\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003ctd\u003e115 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e1306.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM48\u003c\/td\u003e\n\u003ctd\u003eM48 x 5\u003c\/td\u003e\n\u003ctd\u003e75 mm\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003ctd\u003e121 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e1473.1 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM52\u003c\/td\u003e\n\u003ctd\u003eM52 x 5\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003ctd\u003e33 mm\u003c\/td\u003e\n\u003ctd\u003e129 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e1757.8 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM56\u003c\/td\u003e\n\u003ctd\u003eM56 x 5.5\u003c\/td\u003e\n\u003ctd\u003e85 mm\u003c\/td\u003e\n\u003ctd\u003e35 mm\u003c\/td\u003e\n\u003ctd\u003e137 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e2030.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM60\u003c\/td\u003e\n\u003ctd\u003eM60 x 5.5\u003c\/td\u003e\n\u003ctd\u003e90 mm\u003c\/td\u003e\n\u003ctd\u003e38 mm\u003c\/td\u003e\n\u003ctd\u003e145 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e2362.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM64\u003c\/td\u003e\n\u003ctd\u003eM64 x 6\u003c\/td\u003e\n\u003ctd\u003e95 mm\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003ctd\u003e153 mm (ref.)\u003c\/td\u003e\n\u003ctd\u003e2676.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/details\u003e\n\u003cp class=\"screwman-spec-note\"\u003e\u003csmall\u003eNominal dimensions per DIN 931 \/ ISO 4014. Weights are calculated from nominal dimensions and are a guide only (±10%). Values for fit and strength should be confirmed against the standard for critical applications.\u003c\/small\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SM-SPEC END --\u003e","brand":"Screwman","offers":[{"title":"Default Title","offer_id":68087978426519,"sku":"BSS1870H","price":0.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0833\/4875\/0576\/files\/931_A2_6c1c059d-6e9b-4ddf-a22a-478b6e50ddb0.jpg?v=1792342490","url":"https:\/\/screwman.co.za\/products\/hexagon-head-bolts-din-931-stainless-steel-grade-18-8-a2-304-m18-x-70-mm","provider":"Screwman","version":"1.0","type":"link"}