inner diameter

Hole's across measurement

Inner diameter is the distance across the inside of a hollow object, measured from one inner wall to the opposite inner wall.

Pipes, tubes, and rings have both an inner diameter and an outer diameter, and the difference between them is the wall thickness.

Often abbreviated ID: The pipe has a 2-inch ID.

measurement

caliper

Tool measuring thickness or diameter

micrometerMillionth of a meter
gaugeStandard of measurement
millimeterThousandth of a meter

centimeter · inch · radius · tolerance · specification · dimension · clearance · fit · sizing · vernier

bore

tube

Hollow cylindrical passage

cylinderCircular-based solid form
pipeHollow conveyance channel
lumenLight output measure

barrel · channel · conduit · shaft · orifice · aperture · opening · sleeve · liner · nozzle

engineering

pipe fitting

Plumbing connector piece

tubingHollow cylindrical conduit
gasketMechanical leak preventer
sealAuthentication stamp or mark

O-ring · flange · coupling · ferrule · collar · bearing · bushing · spacer · reducer · adapter

Opposites

measurement location

inner diameterwall thickness

Material depth of partitions

Family

inner, diameter, in, inward, inwardly, inwards, innermost, inmost, diametric

Familiarity: Top 500,000
Profile: Used worldwide · Timeless · Concrete · Rated G