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
	2.	Inside Diameter
		a. Inches Milimeters minimum,or
		b. Inches Milimeters	+/- 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. wound position: turns or ° from free position
	5.	Lenght of moment arm ® Inches Milimeters
	6.	Direction of wind Left Right Optional
	7.	End Type Double Torsion Hinge Ends Short Hook Ends Short Offset Ends Special Ends Straight Torsion Ends

1.	Wire Diameter	Inches Milimeters
2.	Coil Diameter	Inches Milimeters
3.	Number of Active Coils
4.	Rate	Pounds Newtons per turn (360°).
5.	° free angle reference

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