How to identify a metric bolt. Bolt grade markings and strength chart.
General Description Of Stud Bolts And Hex Bolts Used In Petro
How to identify a bolt. If you do not have a magnet you can still identify grade 8 bolts by brushing the head of the bolt using a wire brush and counting its radial lines. Diameter and length are identified in millimeters. Additonal information on bolts is located at the bottom of the webpage. The browning ab3 stalker rifle. Type material diameter length and thread pitch or count machine thread fasteners only. You identify grade by looking at the head of the bolt.
In the picture to the left you can see 3 bolts that look very similar at first glance when lying around your work bench. Inches are measured threads per inches. 14 thru 4 na. First measure the diameter. Just remember that each scope base is held down by four screws four at the front and four at the back. This page describes what these attributes represent.
Hex bolt identification markings and strength chart. The first two are 14 diameter and the last one is 6mm. Head marking grade and material nominal size range inches mechanical properties. Identifying bolts by thread pitch. It might have been wrong to refer to a cheat sheet in high school calculus class but nobody is going to blame you for not being able to identify all of the various types of fasteners screw heads drive types nut and washer styles available todayi ran into this fastener type chart created by bolt depot while trying to identify a mystery drive shape used to fasten a part i wanted to remove. Print this page.
In 1994 browning introduced the boss ballistic optimizing shooting system and with it the a bolt ii. It also features a larger curved bottom metal surrounding the magazine well which is not only elegant but easy to identify as on an x bolt. The a bolt ii model is currently in production. To find your serial number you will need to refer to your owners manual. Second measure the pitch pitch is threads per unit. Fasteners are identified by four or five attributes.
Yield strength psi min. Information on how they are written can be found on our how fastener measurements are notated page. Metric are measured thread per millimeter. We have most owners manuals online. Length is measured from under the head. For instance 10 x 110 109 would be a hex head capscrew 20 mm in diameter 110 mm long grade 109.
Look for bolt markings. Grade 2 low or medium carbon steel. As you can see the thread pitch of the coarse metric bolt is much finer than a coarse thread standard bolt. If it takes eight screws to mount the bases it is an x bolt. Diameter is in either inches not decimal or millimeter. There are six radial lines on the heads of grade 8 bolts.
Proof load psi min. Hex bolts will have 109 equivalent to sae grade 8 88 equivalent to sae grade 5 or no markings equivalent to sae grade 2. Some bolts share identical head identification and have significantly different strengths. To determine the size of a bolt. Tensile strength psi 307a low carbon steel. To determine the size of a bolt.
Hex bolt identification markings and strength chart table guide.
Gallery of How To Identify A Bolt
