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    0.385" Bore Dia Threaded Lagging Extension Thermowells

    Threaded thermowells have a bore diameter of 0.385" with a straight shank & lagging extension. Ideal for 3/8" Dia elements. Click here to see more.
    $66.73
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    Data Sheet (PDF)

    0.385" Bore Dia Threaded Lagging Extension Thermowells
    Application:
    Standard length, 3/8' stem, bimetal thermometers. #14 gage thermocouple elements. Armored liquid-in-glass test thermometers. Other temperature-sensing elements having .377 in. maximum diameter.

    Connection Size:
    3/4' NPT and 1' NPT are standard. Other thread sizes are available upon request.

    Materials:
    Brass (ASTM B-16); Carbon Steel (C-1018); Stainless Steel A.I.S.I. 304 & A.I.S.I. 316; Monel. Wells are also available in special materials; prices on request.


    Series 385L—Lagging Extension Type
    All dimensions in inches.

    * NPSM internal pipe thread will accept both NPT and NPS male threads.


    External Thread
    P    		 Model No. Lag. Ext.
    T    		 Elem. Lgth.
    A    		 Insert. Lgth.
    U
    3/4' NPT 3/4-385L-U 2 1/2
            -U 4 1/2
            -U 7 1/2
            -U10 1/2
            -U13 1/2
            -U19 1/2    		 2
    3
    3
    3
    3
    3    		 6
    9
    12
    15
    18
    24    		 2 1/2
    4 1/2
    7 1/2
    10 1/2
    13 1/2
    19 1/2
    1' NPT 1-385L-U 2 1/2
            -U 4 1/2
            -U 7 1/2
            -U10 1/2
            -U13 1/2
            -U19 1/2    		 2
    3
    3
    3
    3
    3    		 6
    9
    12
    15
    18
    24    		 2 1/2
    4 1/2
    7 1/2
    10 1/2
    13 1/2
    19 1/2


    Maximum Fluid Velocity—feet per second
    Well Type Material Insertion Length – “U”
    2 1/2 4 1/2 7 1/2 10 1/2 13 1/2 16 1/2 19 1/2 22 1/2
    3/4' - 385S
    and
    3/4' - 385L    		 Brass 290 (145) 150 (80) 54.1 (48) 27.6 16.7 11.1 8 6
    Carbon Steel 326 (260) 192 (144) 69.5 35.4 20.5 14.3 10.3 7.7
    A.I.S.I. 304 & 316 349 (360) 199 71.9 36.6 21.2 14.8 10.7 8
    Monel 316 (320) 189 (178) 68.1 34.8 20.8 14 10 7.5
    Where single values appear in the velocity tables, these may be considered safe for water, steam, air or gas. In the shorter insertion lengths, consideration is given to the velocity pressure effect of water flowing at higher velocities. The values in parentheses, therefore, represent safe values for water flow, while the unbracketed values may be used for steam, air, gas and similar density fluids.
    See 385S Thermowell Page for Pressure-Temperature Ratings