Hex Bolt Identification, Markings and Strength Chart. Additonal information on bolts is located at the bottom of the webpage. Membership Services. Specification: Description: Material: Proof Load: Yield Strength Min (psi) Tensile Strength Min (psi) SAE J429 Grade 5 ASTM A449: Bolts, Screws,

width across flat hexagon bolt hexagon bolt 1.5 M1.6・M2 M3 2 M2.5 M4 2.5 M3 M5

The charts below show the ideal tightening torque for each bolt grade for a variety of sizes. The size column also includes the thread count. Identify the grade, size, and thread density of your bolts and refer to the tightening torque columns. The “wet” column indicates lubricated bolts, whereas the “dry” column indicated unlubricated bolts.

High Tensile Bolts Specifications There are many grades available, including 10.9, 8.8, DIN 933, and 12.9 grades. Many other standards exist, including IS1364, IS1363, DIN EN ISO 4014, and others. These standards specify fastener sizes ranging from 20mm to 100mm. The various types, such as the High Tensile Bolt, are used for various purposes.

Below is ASME B16.5 150#, 300#, 600# Stud Bolt Flange Chart information that can assist engineers and pipe fitters with calculating the number of fasteners associated according to flange size. This is for informational purposes only. Novices should first make sure that they are looking at the appropriate flange class / schedule "poundage".

In this article, I have covered Flange Bolt Chart and Flange Stud Size. Diameter and Lengths of the stud and bolt are covered in flange standard ASME B16.5 

Bolts, Screws, Studs for High‐ Temperature Service CrMoVa Alloy Steel 1⁄4 thru 2 ½ Over 2 ½ thru 4 Over 4 thru 7 −− −− −− 105,000 95,000 85,000 125,000 115,000 100,000 SAE J429 Grade 1 No Grade Mark Bolts, Screws, Studs 60,000 Bolts, Screws, Studs ASTM A307 Grades A&B 60,000 STANDARD BOLT IDENTIFICATION MARKINGS

Bolt threads are commonly classified as UNC or UNF, designating coarse or fine pitch threads. View our size chart to determine dimensions for your next 

Number of threads per inch ranges from 20 threads for a 1/4-in.- diameter bolt to 4 threads for a 4-in.-diameter bolt. The fine-thread series (UNRF or UNF) is found mostly in automotive and aeronautical work. Threads per inch range from 28 threads for a 1/4-in.-diameter bolt to 12 threads for a 1-1/2-in.-diameter bolt.

For a ¼-20 bolt with a 2A thread class2, the major diameter must be between 0.2408" and 0.2489". This is a range of 0.0081". 2Machinery's Handbook, 23 Revised Edition, page 1499. R. G. Sparber December 26, Page 6 of 14 Nut Thread Minor Diameter Tolerance The diameter of the nut measured from inside flats is called the minor diameter.

Some basic but useful bolt information: Basic Dimensions A more comprehensive view: Which is also available as a PDF or SVG document. Metric Size Pitch Drill