Hammond 1441-20BK3 17x4x3 in Satin Black Steel Chassis, 20 Gauge

The 1441-20BK3 is a 17 in x 4 in x 3 in (432 mm x 102 mm x 76 mm) steel chassis finished in satin black powder paint. It is the satin black version of this size; the same chassis is offered in ASA 61 grey as 1441-20. It suits electronics hobbyists, audio and tube-equipment builders, and OEM engineers who need an open-bottom metal base for mounting components.

Construction is spot welded, heavy-duty 20 gauge steel; the drawing specifies 0.036 in steel for both the chassis and the optional bottom plate. The inner box measures 429.97 mm [16.93 in] long, 99.77 mm [3.93 in] wide and 74.37 mm [2.93 in] high, which is the space available for transformers, boards and wiring. Shipping weight is 2.31 lbs (1.05 kg).

At 17 in long but only 4 in deep, with a 3 in height, this is the slimmest 17 in size in the table; no perforated chassis cover is listed for it. All components are sold separately. The matching satin black bottom panel is 1431-20BK3 (1431-20 in the other finish); bottom plates are punched with 4 holes of 3/16 in diameter and the chassis includes 1/8 in holes to accept them.

• Hardware is not provided: order 1421J6BK (black cover screws, pkg of 6, 6-32 x 1/4 in self-tapping) to attach the bottom plate.
• Rubber feet are sold separately.
• RoHS and REACH compliant; ships shrink wrapped.
• Can be factory modified (milling, drilling, printing); solid models available in STEP or IGES.