Muncy Machine and Upson-Walton

Muncy™ NB Buttons

Muncy NB Button Advantage

NB Buttons are similar wire rope terminations to Muncy’s BB, SB and CB. In fact, some wire rope sizes have the same dimensions among the Muncy button lines. A major difference of the SB Button and the NB Button is that a few of the less common sizes (7/32”, 5/16”) have the same after swage outside diameter as similar-sized common sizes (so you don’t need as many dies) and a few difference in some buttons’ over-all lengths.


Muncy Buttons Stops = Made In America

Muncy uses domestic steel from domestic steel mills for its button stops. Better steel means better and more consistent steel properties for swaging. We manufacture these steel ferrules in our facilities in the USA.

NB Button
All Muncy Machine and Tool™ fittings are machined from carbon steel specially selected for swaging. Aluminum and stainless steel available upon request.
Stock No. Rope Dia. After Swage Dimension Weight lbs. Each
A B
Min Nominal Max Approx.
NB-4 1/8 0.365 3/8 0.375 0.400 0.625 0.02
NB-5 5/32 0.428 7/16 0.438 0.448 0.750 0.03
NB-6 3/16 0.490 1/2 0.500 0.520 0.875 0.04
NB-7 7/32 0.553 9/16 0.563 0.580 1.000 0.06
NB-8 1/4 0.553 9/16 0.563 0.580 1.188 0.07
NB-10 5/16 0.740 3/4 0.750 0.770 1.375 0.15
NB-12 3/8 0.740 3/4 0.750 0.770 1.750 0.18
NB-14 7/16 0.980 1 1.000 1.030 2.000 0.39
NB-16 1/2 1.105 1-1/8 1.125 1.160 2.188 0.59
NB-18 9/16 1.230 1-1/4 1.250 1.290 2.438 0.74
NB-20 5/8 1.355 1-3/8 1.375 1.420 2.875 1.06
NB-24 3/4 1.480 1-1/2 1.500 1.550 3.250 1.35
NB-28 7/8 1.730 1-3/4 1.750 1.800 3.875 2.18
NB-32 1 1.980 2 2.000 2.050 4.375 3.23
NB-36 1-1/8 2.220 2-1/4 2.250 2.300 4.813 4.60
NB-40 1-1/4 2.470 2-1/2 2.500 2.560 5.438 6.27
NB-44 1-3/8 2.720 2-3/4 2.750 2.810 6.000 8.46
NB-48 1-1/2 2.970 3 3.000 3.060 6.500 10.98

CAUTION

NB Buttons are recommended for use on 6 x 19 or 6 x 37 IPS or XIP, EIP, RRL, or IWRC wire ropes. Before using an NB Button for any other type lay, construction or grade of wire rope, it is recommended that the termination be proofloaded to prove adequacy of the assembly. Item numbers are designed to indicate the wire rope size for the particular fitting. For instance, an NB-5 is for 5/32" wire rope.