Industrial Glossary
Key terms, acronyms, and concepts used in MRO procurement, workplace safety, maintenance operations, and industrial supply chain management.
A
Abrasion Resistance
Materials & ComponentsThe ability of a material to withstand rubbing, scraping, or erosion that removes material from the surface. It is a critical specification for gloves, footwear, conveyor belts, and industrial coatings.
ANSI
Standards & CertificationsAmerican National Standards Institute
A private, non-profit organization that oversees the development of voluntary consensus standards for products, services, and systems in the United States. ANSI standards are widely referenced in industrial safety equipment specifications.
Arc Flash
Safety & ComplianceA dangerous electrical explosion that occurs when an electric current flows through an air gap between conductors, creating a bright flash, intense heat (up to 35,000F), and a pressure wave. Arc-rated PPE is required for workers exposed to arc flash hazards.
B
C
CFM
Tools & EquipmentCubic Feet per Minute
A unit of measurement for air flow volume, commonly used to rate air compressors, pneumatic tools, ventilation systems, and dust collection equipment.
CMMS
Maintenance & OperationsComputerized Maintenance Management System
Software that centralizes maintenance information and supports maintenance operations. A CMMS helps teams manage work orders, schedule preventive maintenance, track spare parts inventory, and generate reports.
D
DDP
Procurement & Supply ChainDelivered Duty Paid
An international trade term where the seller bears all costs and risks of delivering goods to the buyer location, including import duties, taxes, and customs clearance.
Downtime
Maintenance & OperationsA period when a machine, system, or production line is not operational due to equipment failure, maintenance, or other reasons. Unplanned downtime can result in significant production losses and increased costs.
Durometer
Materials & ComponentsA measurement of the hardness of rubber, elastomer, and polymer materials. It is commonly measured on Shore A or Shore D scales and is important for O-rings, gaskets, seals, wheels, and vibration dampening products.
F
FOB
Procurement & Supply ChainFree On Board
An international trade term indicating the point at which the seller responsibility for goods ends and the buyer assumes risk and cost. FOB Origin transfers responsibility at the seller facility, while FOB Destination keeps seller risk until delivery.
FR
Safety & ComplianceFlame Resistant
A property of materials that resist ignition or self-extinguish when exposed to flame. FR clothing and materials are essential PPE in industries with fire, arc flash, or flash fire hazards such as oil and gas, electrical utilities, and welding.
G
I
L
Lead Time
Procurement & Supply ChainThe total time from placing an order to receiving the goods, including production time, inspection, packaging, and shipping transit. Lead time is critical for MRO planning to prevent stockouts and production delays.
LOTO
Safety & ComplianceLockout/Tagout
A safety procedure used to ensure that dangerous machines and energy sources are properly shut off and not able to be started up again before maintenance or servicing is completed. Required by OSHA standard 29 CFR 1910.147.
M
MOQ
Procurement & Supply ChainMinimum Order Quantity
The lowest quantity of a product that a supplier is willing to sell in a single order. MOQs are common in B2B industrial procurement and can vary between standard catalog items and custom-manufactured products.
MRO
Maintenance & OperationsMaintenance, Repair, and Operations
The category of supplies, equipment, and activities required to keep a facility, plant, or operation running. MRO encompasses everything from replacement parts and lubricants to cleaning supplies, safety equipment, and hand tools.
MTBF
Maintenance & OperationsMean Time Between Failures
A reliability metric that measures the average time elapsed between inherent failures of a mechanical or electronic system during normal operation. Higher MTBF values indicate more reliable equipment.
N
O
P
PPE
Safety & CompliancePersonal Protective Equipment
Equipment worn to minimize exposure to hazards that cause serious workplace injuries and illnesses. PPE includes items such as hard hats, safety glasses, gloves, respirators, high-visibility clothing, and safety footwear.
Preventive Maintenance
Maintenance & OperationsA proactive maintenance strategy that involves regular, planned maintenance activities performed on equipment to reduce the likelihood of failure. It includes inspections, lubrication, adjustments, cleaning, and scheduled parts replacement.
R
REACH
Standards & CertificationsRegistration, Evaluation, Authorisation and Restriction of Chemicals
A European Union regulation addressing the production and use of chemical substances and their potential impact on human health and the environment. Manufacturers and importers must register chemicals produced or imported above the reporting threshold.
RFQ
Procurement & Supply ChainRequest for Quotation
A formal document sent to potential suppliers inviting them to submit a price quote for specified products or services. In industrial procurement, RFQs usually include specifications, quantities, delivery requirements, and payment terms.
RoHS
Standards & CertificationsRestriction of Hazardous Substances
An EU directive that restricts the use of specific hazardous materials such as lead, mercury, and cadmium found in electrical and electronic products. RoHS compliance is mandatory for products sold in the European Union.
RPM
Tools & EquipmentRevolutions Per Minute
A measure of rotational speed indicating the number of complete turns a rotating object makes per minute. RPM is a key specification for motors, power tools, grinding wheels, drill bits, and rotating machinery.
S
SDS
Safety & ComplianceSafety Data Sheet
A document that provides detailed information about a chemical product, including its properties, hazards, safe handling procedures, storage requirements, and emergency measures. Required under OSHA Hazard Communication Standard (HCS).
SKU
Procurement & Supply ChainStock Keeping Unit
A unique alphanumeric identifier assigned to a product for inventory management and tracking purposes. Each distinct product variation receives its own SKU to support accurate stock control and order fulfillment.
T
Tensile Strength
Materials & ComponentsThe maximum stress a material can withstand while being stretched or pulled before breaking, typically measured in PSI or MPa. It is a key specification for lifting slings, wire rope, chains, bolts, and structural components.
Torque
Tools & EquipmentA rotational force applied to an object, measured in units such as Nm, ft-lb, or in-lb. Torque specifications are critical for fastener tightening, power tool selection, and motor sizing in industrial applications.
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