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US Machine Screws - Dimensions

Machine screw diameters.

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US Machine Screws
Size no.	Thread Diameter		TPI
	Decimal (in) Load Calculator!	Nearest Fractional (in)	Fine	Coarse
	0	0.0600	1/16	80
	1	0.0730	5/64	72	64
	2	0.0860	3/32	64	56
	3	0.0990	7/64	56	48
4	0.1120	7/64	48	40
5	0.1250	1/8	44	40
6	0.1380	9/64	40	32
8	0.1640	5/32	36	32
10	0.1900	3/16	32	24
12	0.2160	7/32	28	24
1/4	0.2500	1/4	28	20
5/16	0.3125	5/16	24	18
3/8	0.3750	3/8	24	16

TPI = threads per inch
threads according UNF – Unified National Fine Thread

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Related Topics

Miscellaneous - Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Fasteners - Bolts, nuts and threaded rods - torque, tension and loads.

Related Documents

Metric Bolt Head and Wrench Size - ANSI/SO, DIN and JIS bolts.
Metric Steel Bolts - Grades and Property Classes - Metric steel bolts, screws and studs - proof and tensile strength.
Reduced Torque with Lubricated Bolts - Lubrication effect on bolt tension and torque.
Screws - Metric vs. Inches - Metric versus Imperial equivalent screw dimensions.
UNC and UNF - Unified Inch Screw Threads - ANSI/ASME B1.1 Unified National Thread - UNC Coarse series and UNF Fine series.
US Bolts - Head and Wrench Sizes - Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt.
US Bolts - Tightening Torques - Recommended bolt torques.
US Machine Screws - Dimensions - Machine screw diameters.
US Wood Screws - Nominal Sizes - Wood screws - nominal sizes vs. diameters.
US Wood Screws - Pilot Holes - Hard wood and soft wood pilot holes, shank clearance holes and countersink diameters.
Wood Screws - Withdrawal Force - Allowable withdrawal load force.
Wrench Spanners - Inches vs. mm - Convert between US Inches and metric mm wrench and spanner sizes.

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