AIA/NAS 521-2011 pdf download COUPLING, FLEXIBLE, LOW PRESSURE, 250 °F, AIR LINE
MATERIAL: SEE PROCUREMENT SPECIFICATION.
CODE: Ø ID CODED AS FIRST DASH NUMBER FROM TABLE I.
LENGTH CODED AS SECOND DASH NUMBER IN .250 INCH INCREMENTS.
EXAMPLE OF PART NUMBER:
NAS521-18-22 = COUPLING, 2.250 ID, 5.500 LONG.
NOTES:
(1) DIMENSIONS IN INCHES. TOLERANCES UNLESS OTHERWISE SPECIFIED: DECIMALS ± .010 (2) TEMPERATURE RANGE: −65 °F TO +250 °F (−54 °C TO +121 °C).
(3) MAXIMUM OPERATING PRESSURE: 20 PSIG.
(4) THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.
(5) UNLESS OTHERWISE SPECIFIED HEREIN, REFERENCED DOCUMENTS SHALL BE THE ISSUE IN EFFECT ON DATE OF MANUFACTURE. HOWEVER, EXISTING MATERIAL INVENTORY CERTIFIED TO A PREVIOUS REVISION OF THE APPLICABLE MATERIAL SPECIFICATION(S) IS ACCEPTABLE FOR USE UNTIL DEPLETION.
(6) DIMENSIONING AND TOLERANCING PER ANSI Y14.5M-1982.
(7) UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THE APPLICABLE DRAWING OR SPECIFICATION MAY BE PROCURED AND USED UNTIL STOCK IS DEPLETED.

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