DXP Enterprises is engaged in the business of distributing maintenance, repair and operating (MRO) products, equipment and service to energy and industrial customers. The company's segments include: Service Centers, which is engaged in providing MRO products, equipment and integrated services, including technical services and logistics capabilities, to energy and industrial customers with the ability to provide same day delivery; Supply Chain Services, which manages all or part of its customers' supply chains including procurement and inventory management; and Innovative Pumping Solutions, which provides custom pump skid packages, pump remanufacturing and manufactures branded private label pumps.

Fastenal is engaged in the wholesale distribution of industrial and construction supplies. The company is a distributor of fasteners and related industrial and construction supplies. This includes threaded fasteners, bolts, nuts, screws, studs, and related washers, as well as miscellaneous supplies and hardware, such as pins, machinery keys, concrete anchors, metal framing systems, wire rope, strut, rivets, and related accessories. The company's fastener product line is primarily sold under the Fastenal product name.

Genuine Parts is engaged in the distribution of automotive replacement parts, industrial parts, and business products. The company's reportable business segments are: Automotive, which distributes automotive parts and accessory items and provides inventory, cataloging, marketing, training and other programs to the automotive aftermarket; Industrial, which distributes industrial replacement parts and related supplies such as bearings, mechanical and electrical power transmission products, industrial automation, and hose, among others; and Business Products, which is engaged in the wholesale distribution of a line of office and other business-related products through a customer base of resellers.

Kaman conducts business in the aerospace, medical and industrial markets. The company produces and markets proprietary aircraft bearings and components; super precision, miniature ball bearings; proprietary spring energized seals, springs and contacts; complex metallic and composite aerostructures for commercial, military and general aviation fixed and rotary wing aircraft; and safe and arming solutions for missile and bomb systems for the United States and allied militaries. The company also manufactures and supports its K-MAX? manned and unmanned medium-to-heavy lift helicopters and restores, modifies and supports its SH-2G Super Seasprite maritime helicopters. The company has one business segment, Aerospace.

Lawson Products is a distributor of products and services to the industrial, commercial, institutional, and governmental maintenance, repair and operations (MRO) marketplace. The company has two segments: the Lawson segment, which distributes MRO products through a network of sales representatives providing vendor managed inventory service throughout the United States and Canada; and the Bolt segment, which distributes MRO products through its branches located in Western Canada. The company's product category includes: fluid power, cutting tools and abrasives, specialty chemicals, electrical, aftermarket automotive supplies, safety, welding and metal repair, and other.

MSC Industrial Direct Co. is a distributor of metalworking and maintenance, repair and operations (MRO) products and services. The company provides stock-keeping units through its eCommerce channels, including its website, mscdirect.com; its inventory management solutions; catalogs and brochures; and call-centers and branches. The company's range of MRO products includes cutting tools, measuring instruments, tooling components, metalworking products, fasteners, flat stock, raw materials, abrasives, machinery hand and power tools, safety and janitorial supplies, plumbing supplies, materials handling products, power transmission components, and electrical supplies.

W.W. Grainger is a distributor of maintenance, repair and operating (MRO) products and services in North America, Japan and Europe. The company's MRO product offering is grouped under material-handling equipment, safety and security supplies, lighting and electrical products, power and hand tools, pumps and plumbing supplies, cleaning and maintenance supplies and metalworking tools categories. The company's segments are the United States, which provides MRO products and services through its eCommerce platform, catalogs, branches and sales and service representatives; and Canada, which serves Canadian customers through its distribution center and branch network as well as sales and service representatives.