TYPE OF
TOLERANCE
CHARACTERISTIC
AND SYMBOL
DATUM
REFERENCE
IMPLIED
CONDITION
ALLOWABLE
MATERIAL MODIFIERS
TOLERANCE
ZONE SHAPE
KEY POINTS TO REMEMBER
PLUS/MINUS
LOCATION
YES
RFS
N/A
DEPENDENT
ON
DIMENSION
  1. CONTROLS LOCATION ZONE OF FEATURE RELATIVE TO A DATUM REFERENCE BI-DIRECTIONALLY.
  2. DOES NOT PERMIT FUNCTIONAL GAGING TECHNIQUES
  3. DOES NOT ALLOW ADDITIONAL TOLERANCE BASED ON SIZE (BONUS)
  4. RELATIVELY INEXPENSIVE TO VERIFY

PLUS/MINUS LOCATION:
Describes the location in which the feature will lie in relation to a datum plane or axis.

PLUS/MINUS LOCATION TOLERANCE ZONE:
Defines a linear zone of tolerance dependent upon the dimension in which a feature or group of features is permitted to vary from its basic location.