The Spring Manufacturing Institute has established a list of specifications necessary for the manufacturing of compression springs.

	1.	Outside Diameter
		a. Inches Milimeters maximum,or
		b. Inches Milimeters	+/- Inches Milimeters
		c. work in Inches Milimeters
	2.	Inside Diameter
		a. Inches Milimeters minimum,or
		b. Inches Milimeters	+/- Inches Milimeters
		c. work over Inches Milimeters
	3.	Load 1 Pounds Newtons
		@ Inches Milimeters	+/- Pounds Newtons
		Load 2 Pounds Newtons
		@ Inches Milimeters	+/- Pounds Newtons
		Rate Pounds Newtons	+/- Pounds Newtons
		between length   Inches Milimeters	and Inches Milimeters
	4.	Max. extended length (inside ends) without set Inches Milimeters
	5.	Relative loop position degrees maximum., seperation of loop planes
	6.	Direction of wind Left Right Optional
	7.	End Type Machine Crossover Side Extended

1.	Length Inside Ends
	a. Inches Milimiters max,or	Inches Milimiters min,or
	b. Inches Milimiters	+/- Inches Milimiters
	c.approx Inches Milimiters
2.	Wire Diameter	Inches Milimeters
3.	Coil Diameter	Inches Milimeters
4.	Number of Active Coils
	(Changing the spring rate will change active coils!)
5.	Body Length Inches Milimeters
6.	Initial Tension Pounds Newtons

1.	Number of Springs
2.	Type of Material
3.	Finish	No Finish Passivate Zinc Black Oxide Tin Nickel Duirem Color Code Phosphate & Oil Varnish Other
	If Other specify
4.	Operating temperature	degrees Fahrenheit Celcius
5.	End use or application
6.	Other