AIA/NAS 5312-2006 pdf download SCREW, 100 DEG FLUSH HEAD, FULL THREAD, NAS1800 SIX LOBE RECESS, SELF-LOCKING AND NON-LOCKING
MATERIAL:
CRES – A286 (UNS S66286) CONFORMING TO THE CHEMISTRY OF AMS 5731，AMS 5732AMS 5737 OR AMS 5853.
TITANIUM ALLOY – 6AL-4V (UNS R56400) PER AMS 4928 OR AMS 4967
LOCKING ELEMENT – POLYETHYLENE TEREPHTHALATE (POLYESTER) PER AMS 3612 ORPOLYAMIDEIMIDE PER AMS 3670 COLOR PTIONAL， 400 DEG MAXLOCKING TOROUEAPPLICABLE FOR 5 TORQUE CYCLES.
HEAT TREAT:
DEVELOP BASIC MATERIAL PROPERTIES AS FOLLOWS，WITH CONTROLS PER AMS-H6875 OR AMS2759 FOR CRES AND AMS-H-81200 OR AMS 2801 FOR TITANIUM.
CRES – 160 – 190 KSI FTU. PRECIPITATION HARDENING PER AMS 5853 OR AMS 2759.(12)
TITANIUM – 160 KSI FTU MIN PER AMS-H-81200 OR AMS 2801.
FINISH:
CRES – PASSIVATE IN ACCORDANCE WITH AMS 2700, METHOD 1,TYPE 2 OR TYPE 8, CLASS 1 ORCADMIUM PLATE PER AMS-QQ-P-416, TYPE ICLASS 2 POST PLATE HYDROGEN EMBRITTLEMENTBAKING AND TESTING PER AMS-QQ-P-416 ARE NOT REQUIRED.
TITANIUM ALLOY NONE OR OPTIONAL ALUMINUM PIGMENED COATING PER NAS4006 WITHCETYL ALCOHOL LUBRICANT PER MIL-L-87132，TYPE IIIGRADE B
CODE:
BASIC PART NUMBER = SCREW，100 DEG FLUSH HEAD, FULL THREAD,NAS1800 SIX LOBE RECESSMATERIAL CODE AFTER BASIC PART NUMBER:ADDE” FOR CRES.ADD”V”FOR TITANIUM.DIAMETER DASH NUMBER DESIGNATES DIAMETER AND THREADFINISH CODE AFTER DIAMETER DASH NUMBER:ADD””FOR PASSIVATION (CRES ONLY)ADD“”FOR BARE TITANIUMADD“A”FOR ALUMINUM PIGMENTED COATING (TITANIUM ONLY)ADD“P”FOR CADMIUM PLATE (CRES ONLY)LENGTH DASH NUMBER DESIGNATES LENGTH IN .0625 INCREMENTS AS TABULATED, INTERMEDIATEOR LONGER LENGTHS MAY BE SPECIFIED BY USE OF WHOLE DASH NUMBERS ONLY. USE OF .25INCH INCREMENTS IS RECOMMENDED FOR SCREWS OVER 3 INCHES LONG.TYPE CODE AFTER LENGTH DASH NUMBERNO CODE = NONLOCKING THREADADD “J” FOR POLYETHYLENE TEREPHTHALATE (POLYESTER) OR POLYAMIDE-IMIDE LOCKING
ELEMENT.AVAILABLE IN PATCH FORM ONLY.
EXAMPLES OF PART NUMBERS:
NAS5312E3-10SCREW，.1900-32 THREAD，PASSIVATED CRES，.625 LENGTH，NONLOCKING.”
NAS5312V5A14″
SCREW.3125-24 THREAD，ALUMINUM PIGMENTED COATED TITANIUM，.875LENGTH，NONLOCKING.SCREW，.3125-24 THREAD，TITANIUM ALLOY，.875 LENGTH，NON-LOCKING
NAS5312V5-141
NAS5312E08P10=SCREW，.1640-32 THREAD，CADMIUM PLATED CRES，.625 LENGTH,NONLOCKING.NAS5312E3P10]=SCREW，.1900-32 THREAD，CADMIUM PLATED CRES，.25 LENGTH，SELFLOCKING.
NOTES:
(1) CONCENTRICITY: CONICAL SURFACE OF HEAD AND PITCH DIAMETER OF SCREW WITHIN .003 FIM
(2) FOR SCREWS TWO INCHES LONG OR SHORTER，COMPLETE THREADS (INCLUDING THE THREADTRANSITION AREA) SHALL EXTEND TO WITHIN 2 THREADS OF THE BEARING SURFACE OF THE HEADSCREWS OF LONGER LENGTH SHALL HAVE A MINIMUM COMPLETE THREAD LENGTH OF 1.750 INCHES
RECESS GAGING IN ACCORDANCE WITH NAS1800. FLUSHNESS GAGE PROTRUSION SHALL BE3INSPECTED PER NAS9800.
(4) DIAMETER OF UNTHREADED PORTION OF SCREWS (INCLUDING THE THREAD TRANSITION AREA) SHALLNOT BE LESS THAN MINIMUM PITCH DIAMEER NOR MORE THAN MAXIMUM MAJOR DIAMETER OFTHREAD.

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