AIA/NAS 840-2012 pdf download PLUG, PIPE THREAD, PROTECTIVE, DUST AND MOISTURE SEAL
MATERIAL:
PLUG:
ALUMINUM ALLOY – 3003-0(UNS A93003) PER AMS-QQ-A-250/2OR ASTM B209OR 6061-0(UNS A96061)PER AMS-OO-A-200/8./8/PLASTIC – POLYETHYLENE PER ASTM D1248,TYPE III OR TYPE IV CLASS, CATEGORY ANDGRADE IS OPTIONAL .
GASKET: CHLOROPRENE
FINISH:
ALUMINUM: NONE OR ANODIZE PER MIL-A-8625，TYPE IIPLASTIC: NONE
CODE:
MATERIAL CODE:
SUFFIX TO BASIC PART NUMBER”_”-AL ALLOY(FOR -4 AND -12 ONLY)P”-PLASTIC(FOR -6 ONLY)
FINISH CODE:
NO CODE -NONE”A”-ANODIZE
EXAMPLE OF PART NUMBER:
NAS840 -12 A
FINISH CODE (IF APPLICABLE)
DASH NUMBER FROM TABLE I
MATERIAL CODE LETTER
BASIC NUMBER
NOTES:
NAS840-4=AL ALLOY PLUG TO BE USED WITH .2500-18 INTERNAL TAPER PIPE THREADNAS840-4A=ANODIZED AL ALLOY PLUG TO BE USED WITH .2500-18 NTERNAL TAPER PIPE THREADNAS840P6=PLASTIC PLUG TO BE USED WITH .3750-18 INTERNAL TAPER PIPE THREAD.
DIMENSIONS IN INCHES1
2)PLUGS SHALL BE SUITABLE FOR USE WITH INTERNAL TAPER PIPE THREADS
PLUGS SHALL BE FREE FROM WARPAGE,CRACKS, CHIPPED EDGES, BLISTERS,AND BURRS(3)
THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.(4
UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THE5APPLICABLE DRAWING OR SPECIFICATION MAY BE PROCURED AND USED UNTIL STOCK IS DEPLETED.
UNLESS OTHERWISE SPECIFIED HEREIN, REFERENCED DOCUMENTS SHALL BE THE ISSUE IN EFFECT ONDATE OF MANUFACTURE HOWEVER, EXISTING MATERIAL INVENTORY CERTIFIED TO A PREVIOUSREVISION OF THE APPLICABLE MATERIAL SPECIFICAION(S) IS ACCEPTABLE FOR USE UNTILDEPLETION.

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