Measuring & Inspection

300+ products

Expected delivery: Tue, Nov 17

Measuring and layout tools for carpenters, machinists, installers and quality inspectors: tape measures and rules, levels and squares, and precision measuring and testing tools such as calipers, micrometers, thread gauges, feeler gauges and thermometers. Whether you're laying out a wall, setting a machine or checking a part against a drawing, the right tool depends on how tight the tolerance is.

How to choose measuring tools

• Match resolution to tolerance. A tape measure reads to fractions of an inch. Calipers typically read to thousandths of an inch, and micrometers resolve finer still. Pick a tool that reads well beyond the tolerance you need to hold.
• Inch, metric or both. Dual-scale tapes and digital calipers that switch units help shops that work in both systems.
• Check thread sizes with gauges. Thread pitch gauges confirm UNC, UNF or metric threads before you order fasteners. See thread sizes explained.
• Levels by length and use. Torpedo levels fit tight spots, longer box beam levels span more surface, and magnetic edges free up a hand on steel.
• Plan for calibration. Precision tools used for quality checks should be verified on a schedule set by your quality system.
• Durability. Jobsite tools take drops. Look for tape cases and level frames that hold up, and store precision tools in their cases.

Equipping a quality lab, a machine shop or several service vans? We can quote mixed orders through our quote request form, and business accounts make repeat ordering simple.

Common questions

Calipers or micrometer, which should I use?

Calipers are versatile and measure outside, inside, depth and step dimensions. Micrometers measure one dimension type over a narrow range but are typically more precise, so they suit tight-tolerance work.

How do I measure a bolt's thread size?

Measure the major diameter with calipers, then use a thread pitch gauge to find threads per inch or the metric pitch. Our hex bolt grades guide covers the strength markings.

What's the difference between a framing square and a speed square?

A framing square is a large L-shaped square for layout on studs and stair stringers. A speed square is a compact triangle for marking cuts and common angles.

Measuring & Inspection by type

• Precision Measuring & Testing 100+
• Tape Measures & Rules 80+
• Levels & Squares 70+

Measuring & Inspection: page 2

• Lufkin 1-1/4 X 5M/16 Tape Measure SKU 182-L1316CMEB-02 $26.38
• Lufkin 1-1/4 X 8M/26 Tape Measure SKU 182-L1325CMEB-02 $31.66
• Mitutoyo 1-2" Inside Micrometer Caliper Type SKU 504-145-194 $384.15
• Mitutoyo 1-2" Inside Micrometerinterchange SKU 504-141-102 $285.86
• Mitutoyo 1-2" Outside Micrometer SKU 504-103-262 $311.15
• Mitutoyo 1.000" Setting Ring SKU 504-177-184 $414.11
• Mitutoyo 1.200" Setting Ring SKU 504-177-289 $434.56
• Mitutoyo 1.400" Setting Ring SKU 504-177-185 $594.67
• Mitutoyo 1.5-12" Inside Micrometer Ext. Rod TY SKU 504-139-201 $421.44
• Approved Vendor 1/2 Inch Drive x 7.5 Inch Wobble L-Handle SKU 14324 $23.29
• Approved Vendor 1/2 X 1-1/4" Square Beveled Washer Malleable Iron Hot Dip Galvanized SKU 14424 $1.38
• Approved Vendor 1/2 x 2 Steel Square Plate Washer Hot Dip Galvanized SKU 14427 $1.62
• Approved Vendor 1/4 Inch Drive x #0 Square Recess Bit Socket SKU 15609 $11.71
• Approved Vendor 1/4 Inch Drive x #1 Square Recess Bit Socket SKU 15611 $11.71
• Approved Vendor 1/4 Inch Drive x #2 Square Recess Bit Socket SKU 15613 $11.71
• Approved Vendor 1/4 Inch Drive x #3 Square Recess Bit Socket SKU 15615 $11.71
• 1/4"X10'/3M Pee Wee Tapemeasure SKU 182-Y613ME $12.92
• Mitutoyo 1/64-17/64" 17 Leaves Radius Gage SKU 504-186-903 $270.00
• Mitutoyo 10-11" Outside Micrometer Ratchet Sto SKU 504-103-187 $429.35
• Stanley 100' Fiberglass Powerwinder Tape Measure SKU LS-00664558-6 $36.56
• Lufkin 10ft WH Clad Mezu SKU 182-W9210 $19.86
• Mitutoyo 11-12" Outside Micrometer Ratchet Sto SKU 504-103-188 $448.56
• Milwaukee 12" Polysteel Combination Square w/Inch & Metric SKU 272-220IM $7.08
• Approved Vendor 12" Square Bastard File SKU 18147 $13.67
• Mitutoyo 12"-16" Outside Micrometer Interchange SKU 504-104-152 $1,141.16
• Mitutoyo 12"/300mm Vernier Caliper SKU 504-530-115 $535.38
• Mitutoyo 12-18" Outside Micrometer w/Interchan SKU 504-104-201 $1,559.21
• L.S. Starrett 123Z-6 6" Master Vernier SKU LS-00665765-4 $2,423.52
• Mitutoyo 150mm Vernier Caliper SKU 504-530-101 $225.28
• Mitutoyo 150mm Vernier Depth Gage SKU 504-527-101 $431.09
• Mitutoyo 16-20" Wide Range Outside Micrometer w/ 4ANVILS SKU 504-104-153 $1,401.03
• Komelon 16ft X1in Self Lock Evolution Tape Measure SKU 416-EV28116 $13.76
• Mitutoyo 18" Heavy Duty Digimaticcaliper SKU 504-550-223-10 $2,459.72
• Mitutoyo 18" Vernier Caliper SKU 504-160-116 $1,080.15
• Mitutoyo 18-24" Outside Micrometer w/Interchan SKU 504-104-202 $1,638.30
• Komelon 19" Measuring Wheel Hi Viz Green SKU 416-MK6012 $88.69
• Mitutoyo 2-12" .001 Im Extensionrod SKU 504-137-212 $853.48
• Mitutoyo 2-3" Disc Micrometer SKU 504-123-127 $419.18
• Mitutoyo 2-3" Outside Micrometer SKU 504-103-217 $347.65
• Mitutoyo 2.000" Setting Ring SKU 504-177-187 $648.37
• Mitutoyo 20"X500mm Vernier Caliper Long Jaw TY SKU 504-534-106 $1,964.22
• Mitutoyo 20-24" Outside Micrometer Interchange SKU 504-104-154 $1,453.54
• Mitutoyo 200mm Vernier Caliper SKU 504-530-108 $271.66
• Mitutoyo 24-30" Outside Micrometer w/Interchan SKU 504-104-203 $2,158.04
• Mitutoyo 25-50mm Inside Micrometer Caliper TYP SKU 504-145-186 $366.08
• Mitutoyo 25-50mm Outside Micrometer SKU 504-103-138 $185.30
• 25G Resettable Drop-N-Tell® Indicators 25/Case SKU DNT25R $139.79/pack of 25
• Mitutoyo 3-4" Outside Micrometer SKU 504-103-218 $259.87