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.

Stainless Steel 316 Bolts and Nuts

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.

 

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.