|
Black Bear Construction Co., Inc.
|
About NBW's (Nuts, Bolts, and Washers) Each railroad line has its own set of specifications for attaching the elements of the trestle. The two basic techniques are bolts and "boat spikes". The bolts are typically 1/2" to 3/4" diameter with a 3" to 4" diameter cast iron washer under the head and nut. The boat spikes are from 5/16" to 1/2" (3/8" is most typical) diameter. These drawings portray the actual sizes and shapes of the NBW's:
|
||||||||||||||||||||||||||
| Grandt Line NBW's by the Sprue | Washer Size in Other Scales | |||
| N | HO | S | O | |
| GL-5066 N Scale 2" Rod NBW Casting (35/Sprue) | 5-1/2" | 3" | 2-1/4" | 1-5/8" |
| GL-5093 HO Scale 2" Rod NBW Casting (20/Sprue) | 9-1/2" | 5-1/4" | 3-7/8" | 2-7/8" |
| GL-5123 S Scale 2" Rod NBW Casting (20/Sprue) | --- | 6-1/2" | 4-3/4" | 3-5/8" |
| GL-0016 O Scale 2" Rod NBW Casting (10/Sprue) | --- | --- | 9" | 6-3/4" |
A cost effective way to show the spike or bolt heads is to use a small spot of black, or dark red (rust colored) acrylic paint. Use high viscosity tube paints that are pasty in texture. Use the flattened end of a toothpick to imprint the "NBW's" shown above.
The Grandt Line NBW's shown in the 10X NBW drawings are intended to represent the nuts and washers used with 2" threaded rods.
Some modelers may wish to install NBW's on the trestles. We recommend the following sizes:
In N scale, use P/N GL-5066 (2" threaded rod in N scale) to create a 6" diameter washer.
In HO scale, use P/N GL-5066 (2" threaded rod in N scale) to create a 3-1/4" diameter washer.
In S scale, use P/N GL-5093 (2" threaded rod in HO scale) to create a 4" diameter washer.
In O scale, use P/N GL-5066 (2" threaded rod in HO scale) to create a 3" diameter washer.
Links | Photos | Contact Black Bear | Products/Price Lists
PO Box 26911
Austin, TX 78755-0911
(512) 467-8400 FAX:(512) 458-8765