Stainless Steel 316 Bolts and Nuts
Marine grade Stainless Steel 316 bolts are often used in high pressure and high temperature environments, the ASTM A193 specified products can be used for other special purpose applications as well.
Apart from being used in structural and architectural applications, the ss 316 Stud Bolt is recommended by most manufacturers due to its resistance to oxidation. Furthermore, their resistance to seawater, brine solution as well as fresh and potable water makes the ss 316 fasteners perfect to be used in marine based engineering. Due to its non-reactive and non-toxic properties, as one of the leading SS 316 nut bolt manufacturer, we recommend using these fasteners in the production of medical surgical instruments. Due to the addition of molybdenum in the alloy of UNS S31600 bolt is what improves general corrosion along with chloride pitting resistance. In addition to having a higher creep strength and higher stress-to-rupture, the ASTM A193 grade 316 bolts have higher tensile strength at elevated temperatures as well. The SS 316 hex bolt exhibits good performance in terms of its strength and toughness in cryogenic conditions. Click here to learn more about the SS316 flange bolt sizes.
Table Of Contents
Stainless Steel 316 Bolts and Nuts Material Specification
| Standard Specification of Stainless Steel 316 Bolts and Nuts | American Society for Testing and Materials A193 |
| Length of SS316 Stud Bolt | 3 Millimetre to 200 Millimetre |
| SS 316 Nuts Size in MM | M3 to M56, 12.7MM to 50.8MM and Custom Sizes |
| Stainless Steel 316 Bolts Size in CM | 1.27CM to 5.08CM |
| 316 SS Washers Size in Inches | 3/6Inch to 2Inch |
| SS Grades | 316 Stainless Steel fasteners |
SS316 Stud Bolt Size Chart In MM And Inches
| Nut Size |
Diameter* |
Height |
||
|---|---|---|---|---|
| Hex Nut | Jam Nut | Nylock Nut | ||
| 2 | 4 | 1.6 | 1.2 | - |
| 2.5 | 5 | 2 | 1.6 | - |
| 3 | 5.5 | 2.4 | 1.8 | 4 |
| 4 | 7 | 3.2 | 2.2 | 5 |
| 5 | 8 | 4 | 2.7 | 5 |
| 6 | 10 | 5 | 3.2 | 6 |
| 7 | 11 | 5.5 | 3.5 | - |
| 8 | 13 | 6.5 | 4 | 8 |
| 10 | 17 | 8 | 5 | 10 |
| 12 | 19 | 10 | 6 | 12 |
| 14 | 22 | 11 | 7 | 14 |
| 16 | 24 | 13 | 8 | 16 |
| 18 | 27 | 15 | 9 | 18.5 |
| 20 | 30 | 16 | 10 | 20 |
Torque Chart of 316 stainless steel hex bolts
Nut Bolt Sizes Inches or # |
Threads Per Inches |
Standard Torque in Inch |
|||||
316 SS Fasteners |
SS 316 Bolts |
||||||
| 1/4 | 20 | 75.2 | 78.8 | ||||
| 28 | 94.0 | 99.0 | |||||
| 5/16 | 18 | 132 | 138 | ||||
| 24 | 142 | 147 | |||||
| 7/16 | 14 | 376 | 393 | ||||
| 20 | 400 | 418 | |||||
| 3/8 | 16 | 236 | 247 | ||||
| 24 | 259 | 271 | |||||
| 1/2 | 13 | 517 | 542 | ||||
| 20 | 541 | 565 | |||||
Available Sizes Inches or # |
Bolt Threads Per Inch |
Standard Torque in Foot |
|||||
SS 316 Nut |
316 SS Screw |
||||||
| 1 1/4 | 7 | 523 | 546 | ||||
| 12 | 480 | 504 | |||||
| 1 1/2 | 6 | 888 | 930 | ||||
| 12 | 703 | 732 | |||||
| 1 1/8 | 7 | 413 | 432 | ||||
| 12 | 390 | 408 | |||||
UNS S31600 Stainless Steel Fasteners Composition Chart
| Grade | Carbon | Manganese | Silicon | Phosphorus | sulphur | Chromium | Molybdenum | Nickel | Nitrogen | |
| 316 / 316L SS bolts | ||||||||||
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.0 | 14.0 | 0.10 | min. | – | – | – | – | – | 16.0 | 2.0 | 10.0 | – |
316 SS Stud Bolts Mechanical Properties
| Grade | Tensile Strength minimum |
High Yield Strength minimum |
Elongation minimum |
Hardness | |
| Maximum | Maximum | ||||
| Stainless Steel 316 Bolts | 515 | 205 | 40 | 95 | 217 |
| 316L SS Bolts and Nuts | 485 | 170 | 40 | 95 | 217 |
AISI 316 bolt properties and applications
Marine grade stainless steel or as simply referred to as alloy 316 is primarily used in marine engineering applications, where these bolts are often exposed to saltwater or to chlorine compounds in seawater. Since bolts made from stainless steel grade 316 has superior resistance to brine solutions the alloy is the preferred choice for marine based applications. Another key area where 316 bolts are applicable is the food and beverage as well as the pharmaceutical industry, which requires sanitary alloys to construct equipment. Frequently the raw materials used in the products have some compounds which can cause corrosion gradually over time. Hence these industries would require equipment that is not only non-reactive to their products but also an alloy that wouldn’t cause toxicity in the products. Grade 316 bolts exhibit corrosion resistance behaviour over a wide range of alkalis, acids and neutral solutions. Therefore even when used in equipment that is a part of acidic or alkali solutions, they do not decay.
In moderately reducing or oxidizing environments, the performance of these bolts does not reduce. Typically seen in the pulp and paper industry where grade 316 bolts are a part of paper making equipment that is constantly in touch with chemicals of a highly corrosive nature such as hypochlorite or peroxide. In comparison to austenitic grade 302 and alloy 304, these aisi 316 bolts offer much better resistance to corrosion especially in the presence of calcium & sodium brine, along with phosphoric acid; and the sulfite liquors and sulfurous acids, mostly seen in the paper pulp industry.