AIA/NAS 1751-2010 pdf download FASTENER, BLIND, INTERNALLY THREADED, EXTERNAL SLEEVE, GENERAL PURPOSE, PROTRUDING HEAD, SELF-LOCKING, 1 /64″ OVERSIZE
FINISH:
LUBRICANT:
CODE:
DRIVE NUT – COLOR CODED GOLDNUT, SCREW & SLEEVE – CADMIUM PLATE,SEE PROCUREMENT SPECIFICATION.
SEE PROCUREMENT SPECIFICATION.
FIRST DASH NUMBER DESIGNATES FASTENER DIAMETER AS SHOWN IN TABLE ISECOND DASH NUMBER DESIGNATES FASTENERS GRIP AS SHOWN IN TABLE ILADD “L” BETWEEN FIRST AND SECOND DASH NUMBER TO DESIGNATE FASTENER WITH SELF-LOCKINGPROVISIONS.ADD DL BETWEEN FIRST AND SECOND DASH NUMBER TO DESIGNATE FASTENER WITH SELF-LOCKING
PROVISIONS AND DRIVE NUT FEATURE.
INTERCHANGEABILITY:
THE “DL” CODE FASTENERS (DRIVE NUT) AND “L” CODE FASTENERS (NO DRIVE NUT) AREFUNCTIONALLY INTERCHANGEABLE.THERE IS NO DIFFERENCE IN INSTALLED CONDITION”DL” PARTS USE EXISTING NSTALLATION TOOLING EXCEPT A NEW HEX NOSE ADAPTOR ISREOUIRED FOR THE -5DL SIZE. THE NOSE ADAPTOR CURRENTLY USED TO INSTALL NAS1669-4LAND NAS1671-4L HEX HEAD PARTS IS USED TO INSTALL -08DL,-3DL AND -4DL SIZES.THE -6DLSIZE IS INSTALLED WITH THE SAME NOSE ADAPTOR CURRENTLY USED TO INSTALL NAS1669-6LAND NAS1671-6L HEX HEAD FASTENERSTHE WRENCH ADAPTORS WHICH ENGAGE AND ROTATETHE SCREW DRIVING FLATS DURING INSTALLATION ARE THE SAME FOR “L” AND DL” CODEFASTENERS THE DL” CONFIGURATION IS CONSIDERED THE PREFERRED FASTENER SYSTEM.
EXAMPLE
NAS1751-3L5 =GENERAL PURPOSE BLIND FASTENER, PROTRUDING HEAD WITH A SHANK DIAMETER OF.2140 AND GRIP OF 282 – .344 AND SELF-LOCKING FEATURE,1/64 OVERSIZE
NAS1751-4DL6 = GENERAL PURPOSE BLIND FASTENER,PROTRUDING HEAD WITH A SHANK DIAMETER OF2750 AND GRIP OF .345- .406 SELF-LOCKING FEATURE AND DRIVE NUT FEATURE1/64 OVERSIZE
NOTES:
“G” IS THE MEAN DIMENSION TO THE NUT NOSE ANGLE INTERSECTION. THIS INTERSECTIONLOCATION MAY VARY AROUND THE PERIPHERY DUE TO ECCENTRICITY
PARTS SHALL BE FREE OF ALL LOOSE OR HANGING BURRS.
OUTSIDE DIAMETER OF HEAD OF SCREW AND OUTSIDE DIAMETER OF SLEEVE SHALL NOT BEGREATER THAN MAXIMUMOD”
BEARING SURFACE OF HEAD SHALL BE AT RIGHT ANGLE TO THE SHANK WITHIN 1/2 DEGREE
TEMPERATURE LIMITATION: 450F MAX
HEAD MARKINGS RAISED OR DEPRESSED 010 MAX
LOCKING FEATURE CONSISTS OF THREE (3) SPHERICAL INDENTATIONS LOCATED 120° APARTON THE PERIPHERY OF THE NUT COMPONENT AND APPROXIMATELY .040 ABOVE THEINTERSECTION OF THE NUT NOSE ANGLE AND OD(MEAN GRIP OF FASTENER)
DISTORTION OF D SHALL NOT EXCEED OD” MAX +.001 FASTENERS MANUFACTURED PRIORTO 1JANUARY 1988，SHALL NOT EXCEED “OD”MAX +.002.

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