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Tolerances and General Information

Materials And Specifications

indent All enclosures can be supplied with material and/or finish certifications on request. Norpin Manufacturing has a comprehensive program to control all material from receipt through completed parts.

Material Thickness

indent The thickness shown in the catalog is a nominal dimension of the blank prior to drawing. The actual thickness of most enclosures is normall 75% or more of the nominal thickness. This depends on the draw depth, the number of draws and material thickness.

Standard Enclosure Tolerances

Length ± 0.015"
Width ± 0.015"
Trim Height ± 0.015"

Indent Width and length are measured at the point of tangency at the closed end of the enclosure. The open end is generally larger due to material spring back and the deep draw process itself. How much larger depends on the material and the depth of the enclosure.

Nutplate Locations

Horizontal and vertical tolerances, ± 0.030"

Type of Material
Code Letters
Aluminum (1100-0)*  
Cold Roll Steel  
Stainless Steel  

*In most cases, 6061-0 AL, 3003H14 AL, or 3003-0 AL can be specified instead of 1100-0 AL.

Custom Enclosures

Norpin Enclosure Numbering System

Norpin Order Guide
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Norpin Manufacturing Co. Inc - 2342 Boston Road - P.O. Box 1031 - Wilbraham, MA 01095 - P: 800-795-1302 - F: 413-599-1696
Providing a competitive and dependable source for deep drawn enclosures where quality and on time delivery is critical.