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U-BOLTS

U-BOLTS

U-bolts are “U” shaped bolts with threads on each end. They are primarily used to hang piping in industrial applications and are often called out by the nominal size pipe they are hanging (e.g. 2” U-bolts are used to hang 2” NPS pipe). Standard U-bolts typically come with nuts, however, the nuts need to be specified for special grade U-bolts .

There are no standard dimensions for exotic high nickel and specialty stainless U-bolts (like Hastelloy® C276 U-bolts, Duplex 2205 U-bolts, Nickel 200 U-bolts, 317L Stainless U-bolts), so Nickel Systems usually supplies them to Grinnell Standard Style UB – 137 regular dimensions. However, if special U-bolts with longer tangents and threads are required, they can also be manufactured, as well as other types of “bent” bolts. Nickel Systems would require a print in order to quote special dimensions per customer requirements.

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Specifications & Technical Data

Dimensions

Pin Fields Diameter, D, and UNC Thread Inside Length, L Inside Width, C Thread Length, T Nominal Pipe Size
3, D 5, LCT Basic Max. Min. Basic Max. Min. Max. Min.
04 012 1/4 – 20 1.250 1.280 1.220 0.563 0.593 0.533 0.810 0.690 1/4
04 013 1/4 – 20 1.250 1.280 1.220 0.750 0.780 0.720 0.685 0.565 3/8
04 022 1/4 – 20 2.250 2.280 2.220 0.750 0.780 0.720 1.560 1.440 3/8
04 017 1/4 – 20 1.750 1.780 1.720 1.000 1.030 0.970 1.060 0.940 1/2
04 020 1/4 – 20 2.000 2.030 1.970 1.000 1.030 0.970 1.060 0.940 3/4
04 031 1/4 – 20 3.125 3.155 3.095 1.000 1.030 0.970 1.560 1.440 3/4
04 023 1/4 – 20 2.250 2.280 2.220 1.125 1.155 1.095 1.310 1.190 3/4
04 027 1/4 – 20 2.750 2.780 2.720 1.125 1.155 1.095 1.435 1.315 1
04 034 1/4 – 20 3.438 3.468 3.408 1.125 1.155 1.095 2.435 2.315 1
04 030 1/4 – 20 3.000 3.030 2.970 1.250 1.280 1.220 1.435 1.315 1 1/4
04 032 1/4 – 20 3.250 3.280 3.220 1.250 1.280 1.220 1.435 1.315 1 1/2
05 021 5/16 – 18 2.188 2.218 2.158 1.375 1.405 1.345 1.435 1.315 1/2
05 022 5/16 – 18 2.188 2.218 2.158 1.375 1.405 1.345 1.060 0.940 3/4
05 023 5/16 – 18 2.188 2.218 2.158 1.500 1.530 1.470 1.060 0.940 1
05 026 5/16 – 18 2.688 2.718 2.658 1.500 1.530 1.470 1.185 1.065 1 1/4
05 045 5/16 – 18 4.500 4.530 4.470 1.750 1.780 1.720 2.060 1.940 1 1/4
05 027 5/16 – 18 2.688 2.718 2.658 1.750 1.780 1.720 1.060 0.940 1 1/2
05 047 5/16 – 18 4.750 4.780 4.720 1.750 1.780 1.720 3.060 2.940 1 1/2
05 032 5/16 – 18 3.188 3.218 3.158 1.750 1.780 1.720 1.060 0.940 2
05 056 5/16 – 18 5.625 5.685 5.565 2.000 2.030 1.970 3.060 2.940 2
05 037 5/16 – 18 3.688 3.718 3.658 2.000 2.030 1.970 1.060 0.940 2 1/2
06 022 3/8 – 16 2.250 2.280 2.220 2.000 2.030 1.970 1.310 1.190 1/2
06 023 3/8 – 16 2.250 2.280 2.220 2.000 2.030 1.970 1.310 1.190 3/4
06 025 3/8 – 16 2.250 2.530 2.470 2.500 2.530 2.470 1.310 1.190 1
06 027 3/8 – 16 2.750 2.780 2.720 2.500 2.530 2.470 1.185 1.065 1 1/4
06 026 3/8 – 16 2.625 2.655 2.595 2.500 2.530 2.470 1.310 1.190 1 1/2
06 031 3/8 – 16 3.125 3.155 3.095 3.000 3.030 2.970 1.310 1.190 2
06 036 3/8 – 16 3.625 3.655 3.595 3.000 3.030 2.970 1.310 1.190 2 1/2
06 066 3/8 – 16 6.625 6.685 6.565 3.000 3.030 2.970 3.060 2.940 2 1/2
06 041 3/8 – 16 4.125 4.155 4.095 3.000 3.030 2.970 1.310 1.190 3
06 055 3/8 – 16 5.500 5.560 5.440 3.500 3.530 3.470 2.310 2.190 3 1/2
08 045 1/2 – 13 4.500 4.530 4.470 3.500 3.530 3.470 1.685 1.565 2 1/2
08 050 1/2 – 13 5.000 5.060 4.940 3.500 3.530 3.470 1.560 1.440 3
08 085 1/2 – 13 8.500 8.590 8.410 4.000 4.030 3.970 3.060 2.940 3
08 055 1/2 – 13 5.500 5.560 5.440 4.000 4.030 3.970 1.560 1.440 3 1/2

 

U-Bolt Specifications

  • ASME B18.31.5-2011

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U-BOLTS Available Materials

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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

Air Pollution Control
Chemical Processing
Electronics & Semi-conductors
Power Generation
Water Systems
Pulp & Paper Mills
Oil & Gas
Pumps & Seals
Aerospace
Valves
Glass Manufacturing

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