McMaster-Carr

Because Invar 36 holds its size and shape when temperatures rise, this nickel-iron alloy is the go-to material when dimensional stability is required. It is commonly used when precision is a priority, such as for scientific instruments and optical devices.

Dia.	Dia. Tolerance		1/2 ft. Lg.	1 ft. Lg.	3 ft. Lg.
1/8"	-0.003" to 0.003"	0000000	00000	000000	000000
1/4"	-0.004" to 0.004"	0000000	00000	00000	00000
3/8"	-0.007" to 0.007"	0000000	00000	00000	00000
1/2"	-0.005" to 0.005"	0000000	00000	00000	000000
5/8"	-0.005" to 0.005"	0000000	00000	00000	000000
3/4"	-0.01" to 0.01"	0000000	00000	000000	000000
1"	-0.01" to 0.01"	0000000	000000	000000	000000

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