Formerly Emhart Teknologies & Infastech

Fractional Stainless Steel Hex Flange Nuts

Stainless Steel Spiralock nuts are made of Grade 316 austenitic stainless steel with exceptional corrosion resistance in many aggressive environments. They are compatible with standard 2A, 3A and UNJ class of fit bolts. Spiralock nuts conform dimensionally to IFI standards.

Fractional Stainless Steel Hex Flange Nuts

Nominal Nut Size Part Number   A Flange Diameter B Across Flats C Across Corners D Nut Thickness E Flange Edge Thickness Min.
1/4–20 F04200MStSl316 Max. 0.594 0.438 0.505 0.236 0.040
1/4–28 F04280MStSl316 Min. 0.574 0.428 0.488 0.222
5/16–18 F05180MStSl316 Max. 0.680 0.500 0.577 0.283 0.040
5/16–24 F05240MStSl316 Min. 0.660 0.489 0.557 0.268
3/8–16 F06160MStSl316 Max. 0.750 0.562 0.650 0.347 0.040
3/8–24 F06240MStSl316 Min. 0.728 0.551 0.628 0.330
7/16–14 F07140MStSl316 Max. 0.937 0.688 0.794 0.395 0.040
7/16–20 F07200MStSl316 Min. 0.910 0.675 0.768 0.375
1/2–13 F08130MStSl316 Max. 1.031 0.750 0.866 0.458 0.050
1/2–20 F08200MStSl316 Min. 1.000 0.736 0.840 0.437
9/16–12 F09120MStSl316 Max. 1.188 0.875 1.010 0.506 0.050
9/16–18 F09180MStSl316 Min. 1.155 0.861 0.982 0.483
5/8–11 F10110MStSl316 Max. 1.281 0.938 1.083 0.569 0.050
5/8–18 F10180MStSl316 Min. 1.248 0.922 1.051 0.545
3/4–10 F12100MStSl316 Max. 1.500 1.125 1.299 0.675 0.060
3/4–16 F12160MStSl316 Min. 1.460 1.088 1.240 0.627
7/8–9 F14090MStSl316 Max. 1.750 1.312 1.515 0.788 0.070
7/8–14 F14140MStSl316 Min. 1.706 1.269 1.446 0.735
1–8 F16080MStSl316 Max. 2.000 1.500 1.732 0.900 0.080
1–12 F16120MStSl316 Min. 1.950 1.450 1.653 0.850