AIA/NAS 523-2007 pdf download FASTENER CODE
2.0 GENERAL DESCRIPTION OF FASTENER CODE
2.1 SCOPE
2.1 .1 This STANDARD PRACTICE includes all types of fasteners in which the installation thereof imparts a permanent deformation which would force the destruction of the fastener to remove it.
2.2 LIMITATIONS
2.2.1 Fasteners which would be included in the above “Types of Fasteners” such as staples or wire stitching are not covered by the code.
3.0 FEATURES COVERED AND METHOD OF SHOWING The symbol includes a single cross whose intersection is at the location of the fastener. When space does not permit, the symbol may be located off to the side and the location of the fastener indicated by an arrow. Fastener identity, size, installation requirements etc. shall be indicated by a letter-numeric coding within the quadrants of the cross as defined herein. Quadrant orientation of the symbol is determined by the direction of the letter-numeric coding as written within the symbol. When the symbol is viewed in a position such that the letters are upright, the upper left hand quadrant is NW etc. The following examples illustrate the basic symbol and quadrant identity.
3.1 NORTHWEST QUADRANT Fastener identity – the identity of the fastener is shown in the NW quadrant by a letter code as listed herein (see section 4.0 APPLICATION). The code is made up of non-significant letters and defines all features of the fasteners except diameter and grip. The code letters are assigned in sequence with the exception of the letters G, I, Q and U and the combinations AD, AN and DD. These letters shall not be used in the fastener symbol. See paragraph 5.3 RESERVED CODES.
3.2 NORTHEAST QUADRANT Fastener Diameter and Location of the Manufactured Head. – The fastener diameter and location of the manufactured head is shown in the NE quadrant by a numeric-letter as defined below. The fastener diameter is shown by a number which is the dash number that represents the diameter in the full part number. If the diameter is designated by digits of the basic part number, then the significant digits shall be shown. The location of the manufactured (preformed) head of the fastener is defined by the code letter “F” for “Far Side” and “N” for “Near Side”. When the location of the manufactured head is insignificant or otherwise determined by the drawing itself, the code letter may be omitted.
3.3 SOUTHEAST QUADRANT
3.3.1 Length and Spot Weld Alternate – the length and permission to spot weld as an alternative assembly method is shown in the SE quadrant by a numeric-letter code as defined below.
3.3.1 .1 The length is shown by a number which is the dash number that represents the length in the full part number.
AIA/NAS 523-2007 pdf download
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