See the Work Behind the Capabilities
Explore ETM Manufacturing’s portfolio of custom sheet metal fabrication, machining, prototyping, assembly, and finishing projects. This page is built for engineers, purchasing managers, and OEM teams who want proof that a manufacturing partner can deliver quality parts, practical support, and reliable execution.
ETM as your proof-backed partner
ETM Manufacturing builds custom parts based on customer engineering designs and supports work across sheet metal fabrication, machining, prototyping, assembly, and finishing. The company’s Littleton, Massachusetts facility supports projects ranging from single prototypes to low-volume production for industries including industrial laser, medical, telecommunications, energy, robotics, and retail display.
Our portfolio page is designed to help you quickly see where ETM fits. Instead of broad claims alone, we give buyers examples of the kinds of parts, assemblies, and manufacturing support ETM provides, backed by project photos and concise summaries that are easier to scan and easier for search engines to understand.
Electronics, AV & Broadcast Equipment Housings
Rack-Mount Chassis with Protective Cover
Precision-formed 19″ rack tray fitted with a smoked acrylic cover and multiple internal mounting studs for securing electronic modules. Powder-coated for durability and finished with clean, burr-free edges so components seat and service without snags. Built to slide into standard equipment racks without modification.
Mobile Rack Enclosure on Casters
A welded and powder-coated rack cabinet mounted on locking casters for equipment that needs to move between rooms or job sites. The hinged door and cutouts for cable routing keep connections organized and protected during transport. Designed for AV, broadcast, or control-room gear that demands both mobility and a clean finish.
Compact Equipment Cart with Cable Access
A rigid, powder-coated equipment enclosure with pre-cut circular ports for cable pass-through, mounted on a rolling base for easy repositioning. Tight tolerances on the cutouts keep connectors snug and reduce strain on cabling. Ideal for AV racks, server carts, or portable control stations.
Custom Instrument Housing with Integrated Mount
A precision-formed aluminum chassis with an integrated vertical mounting post and internal component wells, finished in a durable powder coat. Tight-fitting seams and clean cutouts show the attention to detail needed for sensitive instrumentation or lab equipment. Built to protect internal electronics while giving technicians easy access.
Matched Ventilation Side Panels
A mirror-image pair of formed sheet metal side panels with rows of perforations for airflow, sized to bolt directly onto equipment housings or cabinets. Matching hole patterns on both panels ensure symmetrical assembly every time. A practical solution for keeping electronic or mechanical equipment cool without sacrificing structural rigidity.
Industrial Electrical Enclosures & Control Panels
Weatherproof Enclosure with Viewing Window
A gray powder-coated electrical enclosure featuring a riveted, gasketed viewing window that lets technicians monitor equipment without opening the panel. The hinged door and sealed frame are built to keep dust, moisture, and debris out of sensitive components. A dependable housing for control panels in industrial or outdoor environments.
Access Panel with Quick-Release Window
This enclosure combines a sealed inspection window with wing-nut fasteners for fast, tool-free access when maintenance is needed. The angled construction and tight seams reflect precise forming and welding work behind the scenes. Designed for equipment that needs frequent visual checks without full disassembly.
Custom Copper Junction Box
A formed copper enclosure with mounting flanges and pre-drilled holes, built for applications where conductivity or corrosion resistance matters. Clean, sharp folds and consistent hole placement make installation straightforward for electricians and integrators. A good example of ETM’s ability to work in specialty materials beyond standard steel and aluminum.
Reinforced Enclosure Bracket
A powder-coated, multi-bend bracket with a full set of pre-installed hardware, built to reinforce or mount an electrical enclosure. The layered folds add rigidity without adding bulk, and the consistent finish matches the housing it supports. A small part that plays a big role in keeping equipment secure.
Enclosure Frame with Integrated Cable Port
A welded sheet metal frame with a built-in shelf and a precisely cut oval port for cable or conduit entry. The symmetrical bolt pattern and clean bends make this a drop-in fit for standard enclosure assemblies. Built to simplify installation for electrical contractors working against a deadline.
Precision CNC-Machined Components
Machined Spiral Heat Plate
A CNC-machined aluminum disc with concentric spiral ridges and a bolt-circle pattern, likely destined for a heating or thermal-transfer application. The consistent spiral depth and clean bore show the precision machining ETM applies to parts with tight tolerance requirements. A strong example of complex geometry produced reliably at volume.
Precision Machined Coupling
A small aluminum coupling with a threaded bore and a slotted head, machined to tight tolerances for a reliable mechanical connection. The clean thread finish and consistent wall thickness reduce the risk of failure in the field. An example of the small, high-precision parts that keep larger assemblies running smoothly.
Machined Plastic Housing Component
An octagonal plastic component machined with a bolt-hole pattern and a central bore, built for applications where weight or electrical insulation matters more than metal. The tight, repeatable hole spacing shows the same precision ETM applies to metal parts. Ideal for buyers who need non-metallic components without sacrificing accuracy.
Matched Retention Clips
A pair of formed metal clips with a hooked profile and mounting holes, designed to hold a panel or cover securely in place. Producing them in matched sets ensures consistent fit and function across an entire product line. A simple part that solves a common assembly headache.
Precision Drilled Fixture Plates
A matched pair of machined blocks with a repeating grid of drilled holes, built for use as a test fixture, connector plate, or alignment jig. The evenly spaced pattern and clean edges reflect the tight tolerances needed for parts that other components mount to. Consistency here means fewer headaches downstream on the assembly line.
Perforated Steel Disc
A round steel disc cut with a dense, evenly spaced hole pattern, suited for filtration, ventilation, or straining applications. The consistent hole size and spacing across the entire surface show the repeatability of ETM’s cutting process. A straightforward part where precision spacing matters more than complexity.
Structural Brackets, Panels & Custom Sheet Metal Fabrications
Formed Mounting Bracket with Access Port
A precision-formed bracket combining mounting holes, a large circular cutout, and multiple bend angles into a single piece. Producing this as one formed part instead of several welded pieces reduces assembly time and points of failure. A good example of design-for-manufacturing thinking applied to a structural part.
Mobile Equipment Stand
A welded steel stand finished in durable white powder coat, mounted on heavy-duty locking casters for easy repositioning on a shop or lab floor. The reinforced frame and tray base are built to support equipment weight without flexing. A practical solution for buyers who need their gear to move without compromising stability.
Angled Component Riser
A formed sheet metal riser with a V-shaped base and a row of evenly spaced holes for mounting components at a fixed angle. The clean bends and symmetrical hole pattern keep whatever it holds level and secure. A simple, purpose-built fixture that solves a specific positioning problem.
Four-Point Mounting Base
A cut cross-shaped bracket with a reinforced center plate and four bolt holes, built to serve as a stable base for tables, stands, or fixtures. The symmetrical arm design distributes load evenly across all four points. A clean, minimal part that proves simple geometry can still solve structural problems.
Dual-Rail Support Bracket
A precision-formed aluminum bracket with two parallel rail sections and a full set of mounting and clearance holes. The stepped profile adds strength while keeping the part lightweight. Built for applications where alignment between two mounting points has to be exact every time.
Extended Mounting Rail with Multi-Hole Pattern
A long-format aluminum panel with dozens of precisely spaced holes and a formed right-angle bend at one end. Producing a part this long with consistent hole spacing takes tight process control, not just a good design. A dependable rail for equipment that needs multiple attachment points along its length.
Multi-Bend Structural Bracket
A complex, multi-bend aluminum bracket featuring stepped tabs and offset mounting points along its length. Getting this many bends and holes to align correctly in one part reflects careful tooling and quality control. A strong example of ETM’s ability to handle geometrically complex fabrications without sacrificing accuracy.
Triangular Access Panel
A triangular aluminum panel drilled with a mix of hole sizes for mounting hardware, cable routing, or ventilation. The varied hole diameters in one clean layout show the flexibility of ETM’s drilling and cutting process. Built to fit a specific structural corner or transition point in a larger assembly.
Tapered Structural Wed
A long, tapered aluminum wedge with a formed flange along one edge, built to provide a gradual transition or support surface within a larger structure. The consistent taper and clean flange line show careful forming from end to end. A part that proves subtlety and precision matter as much as size.
Long-Format L-Bracket with Mounting Tabs
An extended L-shaped bracket with multiple bent tabs and rows of mounting holes along its length, built for applications that need support across a wide span. The repeated tab spacing keeps the part straight and true even at length. A dependable choice for equipment frames, rack rails, or structural supports.
Precision Wire Forms & Springs
Custom Formed Wire Hooks
A set of precision-bent wire hooks, each formed to the same profile and finished in a warm bronze tone. Consistent bend radii across every piece mean they hang, hook, or retain exactly the same way every time. A small part category where ETM’s forming accuracy really shows.
Fine-Tolerance Wire Form
A small, precisely bent wire form with a tight hook radius, shown here against a hand for scale. Producing wire parts this small without deforming the material takes specialized tooling and a steady process. Proof that ETM’s capabilities scale down to delicate components, not just heavy sheet metal.