AIA/NAS 5317-2006 pdf download SCREW, PAN HEAD, FULL THREAD, SELF-LOCKING, NAS1800 SIX LOBE RECESS
MATERIAL:
CRES – A286 (UNS S66286) CONFORMING TO THE CHEMISTRY OF AMS 5731,
AMS 5732, AMS 5737 OR AMS 5853.
TITANIUM ALLOY – 6AL-4V (UNS R56400) PER AMS 4928 OR AMS 4967.
LOCKING ELEMENT – POLYETHYLENE TEREPHTHALATE (POLYESTER) PER AMS 3612, OR POLYAMIDE-IMIDE PER AMS 3670, COLOR OPTIONAL, 400 DEG MAX. LOCKING TORQUE APPLICABLE FOR 5 TORQUE CYCLES.
HEAT TREAT: DEVELOP BASIC MATERIAL PROPERTIES AS FOLLOWS, WITH CONTROLS PER AMS-H-6875 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
OR CADMIUM PLATE PER AMS-QQ-P-416, TYPE II, CLASS 2. POST PLATE HYDROGEN EMBRITTLEMENT BAKING AND TESTING PER AMS-QQ-P-416 ARE NOT REQUIRED.
TITANIUM ALLOY – NONE OR ALUMINUM PIGMENTED COATING PER NAS4006 WITH CETYL ALCOHOL LUBRICANT PER MIL-L-87132, TYPE III, GRADE B.
CODE:
BASIC PART NUMBER = PAN HEAD SCREW, SELF-LOCKING, NAS1800 SIX LOBE RECESS MATERIAL CODE AFTER BASIC NUMBER
ADD “E” FOR CRES
ADD “V” FOR TITANIUM.
DIAMETER DASH NUMBER DESIGNATES DIAMETER AND THREAD.
FINISH CODE AFTER DIAMETER DASH NUMBER:
ADD “-” FOR PASSIVATION (CRES ONLY).
ADD “-” FOR BARE TITANIUM.
ADD “A” FOR ALUMINUM PIGMENTED COATING (TITANIUM ONLY).
ADD “P” FOR CADMIUM PLATING (CRES ONLY).
LENGTH DASH NUMBER DESIGNATES NOMINAL LENGTHS IN .0625 INCREMENTS. INTERMEDIATE OR LONGER LENGTHS MAY BE SPECIFIED BY USE OF WHOLE DASH NUMBERS ONLY. USE OF 0.25 INCH INCREMENTS IS RECOMMENDED FOR SCREWS OVER 3 INCHES LONG.
SPECIFY “J” FOLLOWING LAST DASH NUMBER FOR POLYETHYLENE TEREPHTHALATE (POLYESTER) OR POLYAMIDE-IMIDE LOCKING ELEMENT. AVAILABLE IN PATCH FORM ONLY.
EXAMPLES OF PART NUMBERS:
NAS5317E3-10J = SCREW, SELF-LOCKING .1900-32 THREAD, PASSIVATED CRES, .625 GRIP,POLYESTER PATCH.
NAS5317V5-15J = SCREW, SELF-LOCKING .3125-24 THREAD, TITANIUM ALLOY, .938 GRIP,POLYESTER PATCH.
NAS5317V5A15J = SCREW, SELF-LOCKING .3125-24 THREAD, ALUMINUM PIGMENTED COATED TITANIUM, .938 GRIP, POLYESTER PATCH.
NAS5317E08P10J = SCREW, SELF-LOCKING .1640-32 THREAD, CADMIUM PLATED CRES, .625 GRIP, POLYESTER PATCH.
NOTES:
(1) BEARING SURFACE SQUARENESS: WITHIN .003 FIM OF PITCH DIAMETER.
(2) FOR SCREWS TWO INCHES OR SHORTER, COMPLETE THREADS (INCLUDING THE THREAD TRANSITION AREA) SHALL EXTEND TO WITHIN 2 THREADS OF THE BEARING SURFACE OF THE HEAD. SCREWS OF LONGER LENGTH SHALL HAVE A MINIMUM COMPLETE THREAD LENGTH OF 1.750 INCHES.
(3) RECESS GAGING IN ACCORDANCE WITH NAS1800.
(4) DIAMETER OF UNTHREADED PORTION OF SCREWS (INCLUDING THE THREAD TRANSITION AREA) SHALL NOT BE LESS THAN MINIMUM PITCH DIAMETER NOR MORE THAN MAXIMUM MAJOR DIAMETER OF THREAD.
(5) SCREW RECESSES SHALL MEET THE TORQUE TEST REQUIREMENTS SPECIFIED HEREIN WHEN TESTED IN ACCORDANCE WITH THE APPLICABLE PROCUREMENT SPECIFICATION.
(6) SCREWS SHALL BE FREE FROM BURRS AND SHARP EDGES.