Proof load psi min. In the picture to the left you can see 3 bolts that look very similar at first glance when lying around your work bench.
How To Figure Out The Size Of Screws Bolts And Nuts
How to identify a bolt. To determine the size of a bolt. This page describes what these attributes represent. The browning ab3 stalker rifle. Print this page. First measure the diameter. We have most owners manuals online.
Head marking grade and material nominal size range inches mechanical properties. Fasteners are identified by four or five attributes. Some bolts share identical head identification and have significantly different strengths. 14 thru 4 na. Type material diameter length and thread pitch or count machine thread fasteners only. 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.
Identifying bolts by thread pitch. Information on how they are written can be found on our how fastener measurements are notated page. There are six radial lines on the heads of grade 8 bolts. To determine the size of a bolt. Hex bolts will have 109 equivalent to sae grade 8 88 equivalent to sae grade 5 or no markings equivalent to sae grade 2. Diameter and length are identified in millimeters.
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. Additonal information on bolts is located at the bottom of the webpage. For instance 10 x 110 109 would be a hex head capscrew 20 mm in diameter 110 mm long grade 109. To find your serial number you will need to refer to your owners manual. Bolt grade markings and strength chart. The first two are 14 diameter and the last one is 6mm.
If it takes eight screws to mount the bases it is an x bolt. Diameter is in either inches not decimal or millimeter. Look for bolt markings. You identify grade by looking at the head of the bolt. Just remember that each scope base is held down by four screws four at the front and four at the back. Inches are measured threads per inches.
Hex bolt identification markings and strength chart table guide. Metric are measured thread per millimeter. Length is measured from under the head. As you can see the thread pitch of the coarse metric bolt is much finer than a coarse thread standard bolt. In 1994 browning introduced the boss ballistic optimizing shooting system and with it the a bolt ii. How to identify a metric bolt.
Grade 2 low or medium carbon steel. Second measure the pitch pitch is threads per unit. Tensile strength psi 307a low carbon steel. The a bolt ii model is currently in production. 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. Yield strength psi min.
Hex bolt identification markings and strength chart.
Gallery of How To Identify A Bolt
