GRC Couplings and Nipples

Allied Tube & Conduit® offers rigid steel couplings and nipples that are interchangeable with IMC and Rigid (GRC) Steel Conduits and Kwik-Couple® Conduits. Refer to the individual charts for available sizes and box quantities.

Manufactured in accordance with ANSI C80.1

Galvanized Rigid Conduit (GRC) Couplings

Trade SizeMetricNominal OD (A)Length (B)*Threads per Inch*Approx Weight per 100 PcsStd Pkg
*Minimum requirement as per ANSI C80.1
inmminmmlbkg
1/2161.0125.71 5/841.314125.4100
3/4211.2531.81 41/6441.714188.250
1271.5338.71 31/3250.011 1/23013.630
1 1/4351.8747.52 1/3251.611 1/23716.825
1 1/2412.1654.72 1/1652.411 1/25223.625
2532.6567.32 1/854.011 1/27232.720
2 1/2633.2582.63 3/1681.0817077.11
3783.8798.33 5/1684.1821095.31
3 1/2914.50114.33 13/3286.58340154.21
41034.88123.83 33/6489.38300136.11
51296.00152.43 61/64100.48475215.51
61557.20182.94 1/4108.08765347.01

Galvanized Rigid Conduit (GRC) Nipples

Trade SizeMetricLength (A)Total Thread Bend (B)*Threads per Inch*Approx Weight per 100 PcsStd Pkg
*Mimimum requirement as per UL Standard
A tolerance of minus one thread applies to Total length of Thread
inmminmmlbkg
1/216(Close) 1 1/8290.7819.81462.725
1/2161 1/2380.7819.81483.625
1/2162510.7819.814125.425
1/2162 1/2640.7819.814156.825
1/2163760.7819.814198.625
1/2163 1/2890.7819.8142210.025
1/21641020.7819.8142611.825
1/21651270.7819.8143315.025
1/21661520.7819.8144018.125
1/21682030.7819.8145424.525
1/216102540.7819.8146830.825
1/216123050.7819.8148237.225
3/421(Close) 1 3/8350.7920.11494.125
3/4211 1/2380.7920.114104.525
3/4212510.7920.114146.425
3/4212 1/2640.7920.114198.625
3/4213760.7920.1142410.925
3/4213 1/2890.7920.1142812.725
3/42141020.7920.1143415.425
3/42151270.7920.1144319.525
3/42161520.7920.1145223.625
3/42182030.7920.1147333.125
3/421102540.7920.1148940.425
3/421123050.7920.11410949.425
127(Close) 1 1/2380.9824.911 1/2167.325
1272510.9824.911 1/22210.025
1272 1/2640.9824.911 1/22812.725
1273760.9824.911 1/23616.325
1273 1/2890.9824.911 1/24319.525
12741020.9824.911 1/24922.225
12751270.9824.911 1/26429.025
12761520.9824.911 1/27835.425
12782030.9824.911 1/210949.425
127102540.9824.911 1/213862.625
127123050.9824.911 1/216675.325
1 1/435(Close) 1 5/8411.0125.711 1/22210.025
1 1/4352511.0125.711 1/22812.725
1 1/4352 1/2641.0125.711 1/23716.825
1 1/4353761.0125.711 1/24721.325
1 1/4353 1/2891.0125.711 1/25524.925
1 1/43541021.0125.711 1/26629.925
1 1/43551271.0125.711 1/28438.125
1 1/43561521.0125.711 1/210045.425
1 1/43582031.0125.711 1/213661.725
1 1/435102541.0125.711 1/217679.840
1 1/435123051.0125.711 1/221698.030
1 1/241(Close) 1 3/4441.0326.211 1/22812.725
1 1/2412511.0326.211 1/23415.425
1 1/2412 1/2641.0326.211 1/24420.025
1 1/2413761.0326.211 1/25625.425
1 1/2413 1/2891.0326.211 1/26830.825
1 1/24141021.0326.211 1/28036.325
1 1/24151271.0326.211 1/210346.725
1 1/24161521.0326.211 1/212255.350
1 1/24182031.0326.211 1/217077.140
1 1/241102541.0326.211 1/221698.030
1 1/241123051.0326.211 1/2260117.920
253(Close) 2511.0626.911 1/24420.025
2532 1/2641.0626.911 1/25926.825
2533761.0626.911 1/27232.725
2533 1/2891.0626.911 1/28839.940
25341021.0626.911 1/210346.740
25351271.0626.911 1/213259.940
25361521.0626.911 1/216072.630
25382031.0626.911 1/222099.820
253102541.0626.911 1/2285129.320
253123051.0626.911 1/2335152.015
2 1/263(Close) 2 3/4701.5739.988438.11
2 1/2633761.5739.9810045.41
2 1/2633 1/2891.5739.9812054.41
2 1/26341021.5739.9815068.01
2 1/26351271.5739.9819789.41
2 1/26361521.5739.98240108.91
2 1/26382031.5739.98329149.21
2 1/263102541.5739.98422191.41
2 1/263123051.5739.98505229.11
378(Close) 2 5/8671.6341.4811853.51
3783761.6341.4813059.01
3783 1/2891.6341.4815771.21
37841021.6341.4820090.71
37851271.6341.48260117.91
37861521.6341.48300136.11
37882031.6341.48411186.41
378102541.6341.48528239.51
378123051.6341.48630285.81
3 1/291(Close) 2 3/4701.6842.7816072.61
3 1/29141021.6842.78240108.91
3 1/29151271.6842.78320145.21
3 1/29161521.6842.78373169.21
3 1/29182031.6842.78510231.31
3 1/291102541.6842.78655297.11
3 1/291123051.6842.78785356.11
4103(Close) 2 7/8731.7343.9818081.61
410341021.7343.98285129.31
410351271.7343.98380172.41
410361521.7343.98440199.61
410382031.7343.98600272.21
4103102541.7343.98775351.51
4103123051.7343.98925419.61
5129(Close) 3761.8446.78240108.91
512951271.8446.78480217.71
512961521.8446.78600272.21
512982031.8446.78825374.21
5129102541.8446.781055478.51
5129123051.8446.781260571.51
6155(Close) 3 1/8791.9549.58350158.81
615551271.9549.58660299.41
615561521.9549.58820372.01
615582031.9549.581125510.31
6155102541.9549.581440653.21
6155123051.9549.581720780.21

couplings-line-drawinggrc-nipple-line-drawing