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  • Stainless Steel 316L Fasteners

A reason why many clients prefer using grade 316L is that the alloy offers ease in welding. The modification with regards to lowering the carbon content is what helps ease the welding process. Although structurally, the alloy of Stainless Steel 316L Fasteners tends to be weaker than grade 316, most manufacturers increase the content of nitrogen substantially in its alloy. Because of this substantial addition of nitrogen, the austenite structure is stabilized and the toughness and tensile strength properties of the UNS s31603 washers almost rise to the level of regular alloy 316.


Stainless Steel 316L Fasteners

Moreover, the resistance of the alloy to pitting also increases, on account of the content of nitrogen. Most other corrosion resistance properties of grade 316L remain the same as grade 316. For instance, the resistance of the 316L Stainless Steel screws to not only atmospheric corrosion but also moderately oxidizing as well as reducing environments is similar to grade 316. This holds true for the SS 316L Stud bolts, even when exposed to polluted marine atmospheres.



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Since the alloy used to produce fasteners has excellent resistance to intergranular corrosion, the SS 316L nut bolt can be used in an as-welded condition. The mechanical properties of grade 316 such as its excellent tensile strength and toughness are seen even at extremely low temperature settings. Therefore the SS 316L threaded rod is well noted for being used at cryogenic temperatures.


SS 316L threaded rod Chemical Composition Standard

C Si Mn P S Mo Cr Fe Ni
0.035 max 1.0 max 2.0 max 0.045 max 0.030 max 2.00 - 3.00 16.00 - 18.00 68.89 min 11.00 - 14.00

Mechanical Characteristics of 316L Stainless Steel screws

Density Tensile Strength Melting Point Elongation Yield Strength (0.2%Offset)
8.0 g/cm3 Psi – 75000 , MPa – 515 1399 °C (2550 °F) 35 % Psi – 30000 , MPa – 205

Stainless Steel 316L Fasteners specification format

Standard ASTM A193/ ASME SA193
Size of Machine Screw M1.6 - M12
Lengths From 3 upto 200 Millimetre
Sizes of Self Tapping Screws No.2 - No.14
Sizing 3/6 inch upto 2 inch | M3 – M56

SS 316L washers Equivalent grades

UNS AFNOR WERKSTOFF NR. BS JIS GOST EN
S31603 Z3CND17‐11‐02 / Z3CND18‐14‐03 1.4404 / 1.4435 316S11 / 316S13 SUS 316L 03Ch17N14M3 / 03Ch17N14M2 X2CrNiMo17-12-2 / X2CrNiMo18-14-3

SS 316L nut bolt Dimensional Chart

SS 316L nut bolt Dimensional Chart

Minimal Size (D) THE FLATS BODY DIAMETER HEAD THICKNESS CORNERS
F (MAX) F (MIN) D (MAX) D (MIN) H (MAX) H (MIN) C (MAX) C (MIN)
m10 17.00 15.73 10.00 9.78 6.63 6.17 18.48 17.77
m48 75.00 72.60 48.00 47.38 31.07 28.93 86.60 82.76
m100 145.00 140.00 90.00 99.13 63.9 60.10 167.43 159.60
m12 19.00 17.73 12.00 11.73 7.76 4.24 20.78 20.03
m14 22.00 20.67 14.00 13.73 9.09 8.51 24.25 23.35
m16 24.00 23.67 16.00 15.73 10.32 9.68 27.71 26.75
m20 30.00 29.16 20.00 19.67 12.88 12.12 34.64 32.95
m90 130.00 125.50 90.00 89.13 57.74 54.26 150.11 143.07
m24 36.00 35.00 24.00 23.67 15.44 14.56 41.57 39.55
m30 46.00 45.00 30.00 29.67 19.48 17.92 53.12 50.85
m80 115.00 111.00 80.00 79.26 51.58 48.42 132.72 126.54
m36 55.00 53.80 36.00 35.61 23.38 21.63 63.51 60.79
m42 65.00 62.90 42.00 41.38 26.97 25.03 75.06 71.71
m64 95.00 91.80 64.00 63.26 41.32 38.68 109.70 104.65
m56 85.00 82.20 56.00 55.26 36.2 33.80 98.15 93.71
m72 105.00 101.40 72.00 71.26 46.45 43.55 121.24 115.60

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