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Product Catalog

TRAPPIST-1 Orrery

Ferguson's Mechanical Paradox Orrery

Miniature Inner Planet Orrery

Mechanical Paradox Demonstrator

Genaille Lucas Calculating Rulers

Machinist's Clock

HP-01 Battery Tool

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AWG Copper Wire Properties

Center Drill Dimensions

Drill Size & Decimal Equivalents

Imperial Tap Chart

Keyway Dimensions

Metric Tap Chart

Screw Extractors

Sheet Metal Gauges & Weights

Socket Head Cap Screws

Taper Calculations

Taper Shank Dimensions

Wood Screw Dimensions

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Pipe Threads

	American Standard							British Standard
Nominal OD	Threads per Inch	Nominal Outside Pipe Diameter (inches)	Approximate Length of Thread (inches)	Approximate Total Thread Makeup (inches)	NPT		Straight NPS	Threads per Inch	Drill
Nominal OD	Threads per Inch	Nominal Outside Pipe Diameter (inches)	Approximate Length of Thread (inches)	Approximate Total Thread Makeup (inches)	Drill with Tapered Reamer	Drill w/o Tapered Reamer	Straight NPS	Threads per Inch	Drill
1/16	27	0.313			15/64	D	1/4	28	G
1/8	27	0.405	3/8	1/4	21/64	R	S	28	11/32
1/4	18	0.540	5/8	3/8	27/64	7/16	29/64	19	15/32
3/8	18	0.675	5/8	3/8	9/16	37/64	19/32	19	39/64
1/2	14	0.840	3/4	7/16	11/16	23/32	47/64	14	3/4
5/8	-		-		-	-	-	14	53/64
3/4	14	1.050	3/4	1/2	57/64	59/64	15/16	14	31/32
7/8	-		-		-	-	-	14	1-7/64
1	11.5	1.315	7/8	9/16	1-1/8	1-5/32	1-3/16	11	1-7/32

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