AIA/NAS 1635-2010 pdf download SCREW, MACHINE, PAN HEAD, CRUCIFORM RECESS, FULL THREAD, NON-LOCKING AND SELF-LOCKING
MATERIAL:STEEL,CORROSION RESISTING,AUSTENITIC SERIES,NON-MAGNETIC COMPOSITION.
FINISH:
CODE:
PASSIVATE BY IMMERSION FOR A ERIOD OF 30 MINUTES IN A SOLUTION CONTAINING 20%, BY VOLUME, OFNITRIC ACID AT A ROOM TEMPERATURE OF 70F, PLUS OR MINUS 5, FOLLOWED BY A THOROUGH RINSE INHOT WATER(IN ACCORDANCE WITH MIL-DTL-14072，FINISH E300).BLACK OXIDE – FOR CORROSION RESISTING STEEL SPECIFICATION MIL-DTL-13924, CLASS 3.
BASIC PART NUMBER DESIGNATES DIAMETER AND THREADLENGTH DASH NUMBER INDICATES LENGTH IN 0625 INCREMENTS (CONVERTED TO THREE DECIMAL PLACES)INTERMEDIATE OR LONGER LENGTHS MAY BE SPECIFIED BY USE OF WHOLE DASH NUMBER ONLYUSE OF 25 INCH INCREMENTS IS RECOMMENDED FOR SCREWS OVER 2 INCHES LONG.FOR SELF-LOCKING FEATURE, ADD LETTERS BETWEEN THE BASIC PART NUMBER AND THE LENGTH DASHNUMBER AS FOLLOWS:
“LE”- SELF-LOCKING ELEMENT (OPTIONAL TYPE)“LL”- STRIP TYPE LOCKING ELEMENT
“LN”- BUTTON TYPE LOCKING ELEMENT
“LR”- PATCH TYPE LOCKING ELEMENTADD SUFFIX“P”TO LENGTH DASH NUMBER FOR BLACK OXIDE FINISH
EXAMPLE OF PART NUMBER:
NAS1 635-3-1 6 = .1 900-32 DIA. SCREW, 1 .000 LENGTH
NAS1 635-3LE16 = .1 900-32 DIA. SCREW, 1 .000 LENGTH WITH SELF LOCKING ELEMENT (OPTIONAL TYPE)
NAS1 635-3-1 6P = .1 900-32 DIA. SCREW, 1 .000 LENGTH, BLACK OXIDE FINISH

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