Bachmann 16018 HO Southern Pacific #163231 Overnights Box Car Guide

The Bachmann 16018 HO 40-foot box car represents Southern Pacific #163231 in the Overnights scheme. This guide covers the exact item and the manufacturer-listed features, with checks for comparing this road-specific release to other Southern Pacific cars and planning its use on an HO layout.

Exact product identifiers

• Manufacturer: Bachmann
• Item number: 16018
• Railroad and road number: Southern Pacific #163231
• Scheme name: Overnights
• Car type: 40-foot box car
• Scale: HO, 1:87
• UPC: 022899160184
• Model dimensions: 6.5 in. long × 1.5 in. wide × 2 in. high

Use item 16018, road number #163231, and the Overnights name together in a collection record. That combination distinguishes this release from other Southern Pacific models that may share a railroad name but differ in number, car type, or lettering.

Model details listed by Bachmann

The official specification describes a painted body with precision graphics, opening sliding six-foot corrugated doors, a detailed underframe, a separately applied roofwalk and brake wheel, and added weight. The doors add a moving detail for display, but the listing does not identify a load as part of the package.

Bachmann lists magnetically operated E-Z Mate Mark II couplers, detailed trucks with see-through sideframes, and blackened metal wheels with RP25 contours. Compare these details with the equipment already on your railroad. Inspect coupler height and alignment, wheel gauge, and truck movement before adding the car to a longer consist. Use the current manufacturer instructions for maintenance or setup.

Choosing it for a layout or display

Confirm HO scale (1:87) first, then compare the published 6.5 × 1.5 × 2-inch model dimensions with the spaces on your layout. The 40-foot label identifies the modeled car class; it does not set a minimum curve radius. Track geometry, neighboring structures, and the other cars in a train affect practical clearance, so measure tight spots directly.

For a working consist, give the car a low-speed test and check that the couplers operate as expected with your other rolling stock. For a display, compare the Overnights scheme, road number, and visible roof and underframe details with neighboring models. These steps help validate an exact-roster match without assuming universal compatibility.

Quick verification checklist

• Match Bachmann item 16018 and Southern Pacific #163231.
• Confirm the Overnights scheme in the exact images.
• Check HO scale and the listed model dimensions.
• Compare the E-Z Mate Mark II couplers and RP25 wheels with your layout standards.
• Review the current product page for live offer and package details.

Find the model and related guides

View Bachmann 16018 Southern Pacific #163231 · Bachmann model trains · HO scale trains · Model train rolling stock

Compare more Bachmann freight cars in our New Haven #39285 guide and Seaboard #2525 Beer Car guide.

Summary: Bachmann 16018 is the HO-scale Southern Pacific #163231 Overnights 40-foot box car, with sliding doors, E-Z Mate Mark II couplers, and blackened RP25 metal wheels. Verify its exact identity, scale, dimensions, and running gear against your collection and layout.

Specifications checked against Bachmann’s official item 16018 listing and the current Muncle Mikes product record on October 18, 2026.