metric bolt grade markings

Bolts of ISO class 8.8 and the slightly stronger class 9.8 roughly correspond to an SAE Grade 5 bolt. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. Our business is committed to: Bolt Marking & Identification – Metric & UNC/UNF M BM 8.8 BM 8.8 M BM 10.9 M BM B7 A2 M BM 70 A4 M BM 70 BM BM Metric Class 4.6 (Mild Steel) Metric Class 8.8 (High Tensile) Metric Class 10.9 (Higher Tensile) Metric Grade 304 (Stainless Steel) Metric Grade 316 (Stainless Steel) Imperial SAE Grade 5 (High Tensile) Imperial SAE Grade 8 (Higher Tensile) B7 Studs (High Tensile) Metric Class 8.8 … ASTM F568M is an ASTM International standard for metric bolts, screws and studs that are used in general engineering applications. ASTM A 193 Grade B8 Class 2 The grade markings on the head tell the story. The standard metric bolt diameters are specified in the standard ISO 898-1 Tables 4 and 5. On the head of each bolt there are two numbers which are separated by a decimal point. Radial lines, such those used to mark SAE grades, are never used on metric bolts. Hex head bolts M5 and larger must have the property class marked on the head of the bolt, either in raised or depressed lettering. Tensile Strength (psi / MPa) US Bolts No Markings Grade 2 Low or … Grade Markings for Metric Fasteners. Fastener manufacturers product identification starts with the manufacturer's symbol marked on the head, all high-grade fastener product contains the manufacturers mark along with the material grade. 2)When low carbon martensitic steels are used for property class 10.9 the symbol 10.9 shall be underlined: 10.9 Identification with the manufacturer's … A bolt head with three raised dashes in a radial pattern marks an SAE grade 5 bolt of tempered medium carbon steel with a … This grade 2 bolt has no markings, no slashes at all. Class 4.6 Metric Bolt 7. 2 streets south of Northern Avenue. Low grade bolts are going to work for most everyday applications, like mounting a flat screen television, or keeping your chair together. Head Markings. In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification. There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. The bolt heads also have a code of normally two or three letters that indicate the manufacturer. These numbers do not give us any insight as to the size or hardness of the bolt. • Good service Tensile strength is the amount of pull the bolt can withstand before breaking. The grade 8.8 refers to the tensile strength which is generally 116,000 psi, grade 10.9 is generally 150,000 and grade 12.9 is generally 175,000 psi. Many metric automotive bolts are stamped with numbers creating a lot of confusion as to the actual grade (hardness) of the bolt. Google sez... 4 or No Mark = Class 4.4 8 or Long Slash From Hex Point And Dot = Class 8.8 Refined 8 … 8.8 is also 20 – 50% less expensive. There are no markings on the head. The width of the hexagon nuts across flats s is specified in ISO 898-2 Table A.1 for bolt sizes M5 to M39. Yield Core Hardness Rockwell Strength (MPa) Min. The higher the ISO numbers are, the stronger the bolt. This standard … 57,000. Manufacture’s identification mark, e.g., “X” (on head of bolts and screws and on one end of studs and studs-bolts). Over 3/4 thru 1-1/2: 33,000: 36,000: 60,000 psi. An ISO Class 10.9 bolt roughly corresponds to an SAE Grade 8 bolt. Phone: 623-939-9312 This property class designation conveys most of the relevant necessary information about the fastener due to the design of the metric marking system. You can stock up on nuts, bolts and washers. 510 Mpa. All-Pro Threaded neither employs nor maintains an engineering or technica l staff, and All-Pro is merely supplying certain manufacturing, technical, and/or design specifications and data r eceived by All-Pro Threaded … According to Imperial (SAE) and Metric specifications, as the grade and class of the fasteners increase, so do that of the bolt’s tensile strength. These bolts are the highest yield fasteners for carbon steel. It is titled: Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners. Rather than being stamped with F593C/D or F593G/H (ASTM specifications for inch series stainless bolts), metric bolts will have a metric property class designation stamped on the head. Low or medium carbon steel. The higher grade … look no further then to the FASTENALL PDF Document. USA Grade 5 bolts are the most common bolts found in automotive and other applications. 1,456 metric bolt markings products are offered for sale by suppliers on Alibaba.com A wide variety of metric bolt markings options are available to you, There are 44 suppliers who sells metric bolt markings on Alibaba.com, mainly located in Asia. This is a totally legitimate practice. The grade/class of a bolt and it’s manufacturer are identified on the head. markings. The SAE marking standard starts with grade 2, indicated by a bolt head with no markings whatsoever. Tensile (MPa) Grade Identification Marking Min. Can be used with a nut, or in a tapped hole. Special markings on screw heads and nuts identify the fastener's grade. 1/4 thru 3/4. Over 3/4 thru 1-1/2. USA Grade 2 bolts are commercial low tensile bolts and do not require grade marking; they normally have the manufacturers mark on the head the material is similar in strength to European metric class 4.6. For metric M5 and larger, the property class and manufacturer’s I.D. SAE Grade 8, Metric 10.9. Tensile Strength; NO MARKINGS: GRADE 2. A Grade 5 bolt can be identified by the three lines. Many metric automotive bolts are stamped with numbers creating a lot of confusion as to the actual grade (hardness) of the bolt. Grade 2. I didn't know that the SAE grade markings applied to metric bolts and specifically metric bolts from Suzuki. Standard Metric Bolt Dimensions and Grades Metric - M8- 1.25 × 25 A B C Major thread diameter in millimeter (C) Length in millimeters (A) Distance between threads in millimeters (B) Bolt Dimensions Metric Grade Markings Torque Values Applications ENGINE 163-224 cc 270-459 cc Name Size Torque Value Size Torque Value Nm ft-lb Nm ft-lb June 19th, 2018 - Bolt Grade Markings And Strength Chart Mechanical Properties Head Marking Grade And Material Metric Bolts 8 8 Class 8' 'bolt chart grade sae and metric fdhnet de june 21st, 2018 - read and download bolt chart grade sae and metric free ebooks in pdf format guided reading tips guitar hero on tour guide guided reading kennedy and the' 'Boltmasters Pty Ltd Recommended Assembly Torques … Metric bolts have the grade number formed on the head face. Low or Medium Carbon Steel. Metric Grade 10.9 Bolts. The chart below shows metric bolt conversions and DIN numbers for fasteners. Deepak Fasteners Ltd., through its Unbrako Division and associated companies, warrants that these products conform to industry standards specified herein and will be free from defects in materials and workmanship. On the head of each bolt there are two numbers which are separated by a decimal point. Carbon Steel 12.9 C P S B; 0.28-0.5: 0.025: 0.025: 0.003 . 1. Standard Metric marking marking marking Albany Fasteners/ Pawtucket Fastener DIV 327 Pine st Pawtucket, RI 02862 S B PMC Allfast Fastening Systems 15200 Oon Julian Rd Industry, CA 91745 On headg Allied Tubular Rivet 294 Carlton Dr carol Stream, IL 60188 No hoa&nark Alloy & Stainless Fasteners, Inc 11625 Charles St Houston, TX 77041 length Stu"; hex nuts; hex head end tap . The other common mistake people make is to size their bolt based upon the wrench size. Link Grade and Class . 8.8 is about 30% weaker. … DIN 931 / ISO 4014 Partially Threaded Hex Cap Screw, 10.9 Grade Bare Steel / Yellow Zinc Plated, 10.9 Grade Bare Steel with Extended Threads, DIN 933 / ISO 4017 Fully Threaded Hex Cap Screw, DIN 960 / ISO 8765 Partially Threaded Hex Cap Screw (Fine Thread), DIN 961 / ISO 8676 Fully Threaded Hex Cap Screw (Fine Thread), Japanese Industrial Standard (JIS) Hex Fasteners, JIS B1189-10.9 Small Head Hex Flange Zinc Plated, DIN 912 / ISO 4762 Socket Head Cap Screws, DIN 7991 / ISO 10642 Flat Head Countersunk Socket, DIN 911 / ISO 2936 Short Arm Chrome Vanadium, DIN 911 / ISO 2936 Long Arm Chrome Vanadium, DIN 125 / ISO 7089,7090 Bare Steel/Zinc Plated, DIN 125 / ISO 7089,7090 A2/A4 Stainless Steel, DIN 126 Bare Steel/Hot Dipped Galvanized (ISO FIT), DIN 1440 For Clevis Pins Bare Steel/Zinc Plated, DIN 6916HV-10 Structural Bare Steel/Yellow Zinc Plated, DIN 127B Spring Steel Bare Steel/Zinc Plated/Yellow Zinc Plated, DIN 127B Spring Steel Hot Dipped Galvanized, DIN 127B Alloy Steel Lock Washer Yellow Zinc Plated, DIN 7980 High Collar Bare Steel/Zinc Plated, DIN 6798V Serrated Countersunk Zinc Plated, NFE 25-511 Contact Washer Yellow Zinc Plated, DIN 2093 Disc Spring Carbon Steel/Chrome Vanadium, DIN 137B Crinkled Spring A2 Stainless Steel, DIN 934 Bare Steel/Zinc Plated/Hot Dip Galvanized, DIN 985 Nylon Insert Zinc Plated / Hot Dipped Galvanized (ISO FIT), DIN 963 Slotted Flat Countersunk A2 Stainless, DIN 965 Phillips Flat Countersunk A2 Stainless Steel, DIN 7985 Phillips Pan Head A2 Stainless Steel, DIN 975-8.8 Hot Dipped Galvanized (ISO FIT), ISO 529/DIN 374 HSS-G/HSS-E Metric Machine Taps, DIN 580 Lifting Eye Bolt A2 Stainless Steel, DIN 479-8.8 Square Head Set Screw Bare Steel, DIN 931-A2/A4 / ISO 4014 Hex Head Cap Screw Part Thread, DIN 933-A2/A4 / ISO 4017 Hex Head Cap Screw Full Thread, DIN 912-A2/A4 / ISO 4762 Socket Cap Screw, DIN 7991-A2/A4 / ISO 10642 Flat Head Countersunk Socket, DIN 125-A2/A4 / ISO 7089,7090 Flat Washer, DIN 965-A2 Phillips Flat Head Countersunk, DIN 975-A2 Threaded Rod (1 Meter) FINE Thread, DIN 933 / ISO 4017 Hex Cap Screw Fully Threaded, DIN 963 Slotted Flat Head Countersunk Machine Screw, Holo-Krome Grade 9 Inch Heavy Hex Cap Screws, Holo-Krome 12-Point Flange Screws – Imperial, Short Arm Hexagon Key CV Steel Black Finish, Long Arm Hexagon Key CV Steel Satin Finish, Identification with the manufacturer’s mark and the property class is mandatory for hexagon screws 3.6 to 12.9 and socket head cap screws 8.8 to 12.9 with thread diameter d. Identification with the manufacturer’s mark and property class is mandatory for hexagon nuts with thread diameter d ≥ 5 mm. Note it's pretty easy to remember the bolt markings once you see them. If you have ever looked a metric hex bolt you might notice the markings 8.8, 10.9 or 12.9 this does not mean grade 8,10 or 12. The … Tensile Strength (psi / MPa) US Bolts No Markings Grade 2 Low or medium carbon steel 1/4 thru 3/4 The only thing that you're going to see on here is the manufacturer's initials or their letters. This is a grade two bolt. These numbers do not give us any insight as to the size or hardness of the bolt. 2. Grade 5 CONTACT US Nominal Size Range (Inches) Mechanical Properties. It consists of medium carbon alloy steel, heat-treated, quenched and tempered. (MPa) Proof Load (MPa) 520 Class 5.8 bolts, screws, studs M5 — M24 Low or medium carbon steel (75,900 psi) 420 380 830 Class 8.8 bolts, screws, studs M16— M72 Medium carbon steel, quenched and tempered … Replace a graded fastener with same or higher grade (don't replace a Grade 8 fastener with a Grade 5 or 2). We can help you design an outdoor shade system for the long, hot summer. Browse Categories. Class 9.8 Metric Bolt 11. 2. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. Property classes for steel bolts, screws and studs The code is comprised of two numbers separated by a dot. Bolt grade markings & strength. 1. In addition to the indicated grade marking, all grades, except A563 Grades O, A, and B, must be marked for manufacturer indentification. 2) When low carbon martensitic steels are used for property class 10.9 the symbol 10.9 shall be underlined: 10.9 . The Nut and Bolt Solution Series Our video shows how to read the markings or grade lines on a nut to determine the grade. Grade: Bolts are also specified for strength, known as Grade for SAE or … This also leads to misunderstanding the size and hardness of the bolt in question. Joined: Aug 1, 2004 Oddometer: 27,513 Location: Moneyapolis, MN. We see bolts with a 9, or a 7, perhaps even a 10 stamped in the head. Property class (often just "class") specifies metric fasteners. Mechanical ProPerties of Metric externally threaded fasteners (iso 898-1) Metric Property Class Typical Material Size Range (mm) Proof Strength (MPa) Min. Embossed markings must not protrude beyond the bearing surface of the nut. It defines mechanical properties for fasteners that range from M1.6 to 100 in diameter. Because each fastener is uniquely marked by its maker, the part can easily be traced back to its manufacturer should a problem oc… • Abundant product selection Grade 5 is heat-treated. Yield Strength (psi) Min. National This is a structural steel bolt, or they call this a structural bolt. The grade 8.8 refers to the tensile strength which is generally 116,000 psi, grade 10.9 is generally 150,000 and grade 12.9 is generally 175,000 psi. Identification with the … The below diagram shows examples of English and Metric bolt and nut markings. In the metric world (a.k.a. ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength.It defines mechanical properties for bolts that range from 1 ⁄ 2 to 1 1 ⁄ 2 inches (13 to 38 mm) in diameter.. The Fastener Quality Act mandates that manufacturers mark each fastener with a symbol to identify the company that made it. Class 8.8 Metric Bolt 10. Bolt grade markings & strength. The common class … This also leads to misunderstanding the size and hardness of the bolt in question. Of course, there are exceptions to this law, such as fasteners that are too small to mark, but don’t worry about it. The standard was withdrawn in 2012. If the bolt head is marked with 8.8, 10.9 or 12.9, this is a metric bolt and the diameter, head, length and thread pitch is measured in mm. This warranty is expressly given in lieu of any and all other express or implied warranties, including any implied warranty of merchantability or fitness for a particular purpose, and in lieu of any … It is a hardened bolt. USA Grade 5 bolts have three evenly spaced radial lines on the head, and the material is similar in strength to European … (Map) Yield Strength Min. If there are no head markings at all, they are most likely comparable to the SAE grade 2.

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