AIA/NAS 1251-2011 pdf download BOLT, RING, SWIVEL
MATERIAL:
STEEL PER NAS498.
HEAT TREATMENT:
DEVELOP BASIC MATERIAL PROPERTIES AS FOLLOWS, WITH CONTROLS PER AMS-H-6875 OR AMS2759:1 60 TO 1 80 KSI.
FINISH:
CADMIUM PLATE, AMS-QQ-P-41 6, TYPE II, CLASS 3 OR ZINC PLATE, ASTM B 633, TYPE II, SC 1 .
CODE:
BASIC PART NUMBER FROM TABLE I DESIGNATES SWIVEL SIZE AND SHANK DIAMETER.SECOND DASH NUMBER INDICATES GRIP LENGTH IN .0625 NCREMENTS ROUNDED TO THREEDECIMAL PLACES.USE“D”IN LIEU OF 2ND DASH FOR DRILLED THREAD
EXAMPLES OF PART NUMBER:
NAS1251-5D8BOLT, RING,5,000 LB RATED CAPACITY DRILLED THREAD，.500 GRIP LENGTH1NAS1251A10-0BOLT, RING10.000 LB RATED CAPACITY WITHOUT DRILLED THREADTHREADEDTO SHOULDER
NOTES:
MINIMUM ULTIMATE CAPACITY OF EYE SHALL BE 1.4 TIMES THE RATED CAPACITY. RING MAY BE INANY POSITION IN RELATION TO STUD
ASSEMBLY OF RING AND STUD MUST PERMIT FREE MOVEMENT OF RING THRU 180 DEGREES
MAGNETIC PARTICLE INSPECTION PER ASTM E 1444.
MAXIMUM WEIGHT SPECIFIED IS FOR PARTS IDENTIFIED WITH SECOND DASH NUMBER OF “O”THREADED TO SHOULDER
DASH NO.“10” AND “25 ARE INACTIVE FOR DESIGN AFTER APRIL 1,1960. USE “A10” AND “A25’WHERE APPLICABLE.
INTERMEDIATE OR LONGER LENGTHS MAY BE SPECIFIED BY USE OF WHOLE DASH NUMBERS ONLY.
DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED.
THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.
UNLESS OTHERWISE SPECIFIED, PART INVENTORY MANUFACTURED TO PREVIOUS REVISIONS OF THEAPPLICABLE DRAWING OR SPECIFICATIO MAY BE PROCURED AND USED UNTIL STOCK IS DEPLETEDREFERENCED DOCUMENTS SHALL BE THE ISSUE IN EFFECT ON DATE OF INVITATIONS FOR BID11)DIMENSIONING AND TOLERANCING PER ANSI Y14.5M-1982

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