AIA/NAS 1673-2010 pdf download FASTENER, BLIND, INTERNALLY THREADED, EXTERNAL SLEEVE, LIGHTWEIGHT, PROTRUDING HEAD, SELF-LOCKING
MATERIAL: NUT – ALUMINUM ALLOY
SCREW – ALLOY STEEL
SLEEVE – CORROSION RESISTANT STEEL
SEE PROCUREMENT SPECIFICATION
(CLASS 3)
DRIVE NUT – MILD STEEL
SEE PROCUREMENT SPECIFICATION
FINISH: DRIVE NUT – COLOR CODED BLUE
NUT – ANODIZE (CLEAR)
SCREW & SLEEVE – CADMIUM PLATE
LUBRICATION: SEE PROCUREMENT SPECIFICATION
CODE:
FIRST DASH NUMBER DESIGNATES FASTENER DIAMETER AS SHOWN IN TABLE I.
SECOND DASH NUMBER DESIGNATES FASTENER GRIP AS SHOWN IN TABLE II.
ADD “L” BETWEEN FIRST AND SECOND DASH NUMBER TO DESIGNATE FASTENER WITH SELF-LOCKINGPROVISIONSADD DL” BETWEEN FIRST AND SECOND DASH NUMBER TO DESIGNATE FASTENER WITH SELF-LOCKINGPROVISIONS 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.”DLPARTS USE EXISTING INSTALLATION TOOLING THE NOSE ADAPTOR CURRENTLY USED TOINSTALL NAS1669-4L AND NAS1671-4L HEX HEAD PARTS IS USED TO INSTALL-08DL,-3DLAND -4DL SIZES. THE WRENCH ADAPTORS WHICH ENGAGE AND ROTATE THE SCREW DRIVINGFLATS DURING INSTALLATION ARE THE SAME FOR “L” AND “DL” CODE FASTENERSTHE”DL” CONFIGURATION IS CONSIDERED THE PREFERRED FASTENER SYSTEM.

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