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National Coarse Right Hand Thread. For joining threaded rods where span of application exceeds 144" or where a threaded fitting is used with threaded rod in suspension applications.

Zinc Plated Steel Coupling Nuts
Unit of Measure
1 

Item #

Tap Size

Outside Hex

Overall Length

Estimated WT/Package

Estimated WT/100

25505 9 N/A 10 - 24 N/A 5/16 " N/A 3/4 " N/A 0.35 lb N/A 0.7 lb
25510 3 N/A 1/4" - 20 N/A 3/8 " N/A 7/8 " N/A 1 lb N/A 2 lb
25515 8 N/A 5/16" - 18 N/A 1/2 " N/A 1-1/8 " N/A 0.75 lb N/A 3 lb
25520 2 N/A 3/8" - 16 N/A 5/8 " N/A 1-3/4 " N/A 2.9 lb N/A 11 lb
25525 7 N/A 7/16" - 14 N/A 11/16 " N/A 1-3/4 " N/A 2.6 lb N/A 10 lb
25530 1 N/A 1/2" - 13 N/A 11/16 " N/A 1-3/4 " N/A 3 lb N/A 12 lb
25535 6 N/A 5/8" - 11 N/A 13/16 " N/A 2-1/8 " N/A 3.7 lb N/A 18 lb
25540 0 N/A 3/4" - 10 N/A 1 " N/A 2-1/4 " N/A 6 lb N/A 29 lb
25545 5 N/A 7/8" - 9 N/A 1-1/4 " N/A 2-1/2 " N/A 5.3 lb N/A 53 lb
25550 9 N/A 1" - 8 N/A 1-3/8 " N/A 2-3/4 " N/A 7 lb N/A 70 lb
25555 4 N/A 1-1/8" - 7 N/A 1-1/2 " N/A 3 " N/A 9 lb N/A 90 lb
25560 8 N/A 1-1/4" - 7 N/A 1-5/8 " N/A 3 " N/A 9.8 lb N/A 97 lb
Unit of Measure
1