AIA/NAS NA 0162-2005 pdf download SETSCREW, HEXAGON SOCKET, CUP POINT, A286 CRES, METRIC
A-286 CRES per procurement specification
Passivate per AMS 2700，method 1， type 2 or 8，class 1
First three numbers designate thread size in millimetres as tabulated in Table I. Secondthree numbers designate nominal length in millimetres in increments as tabulated in TableII.
EXAMPLE OF PART NUMBER: NA0162-050008: et screw，MJ5 x 08 thread; 8 mm long
NOTES:
1.SURFACE TEXTURE PER ASME B46,1，THREAD SURFACES 8um MAX: ALL OTHER SURFACES 3.2umMAX.
Magnetic permeability shall be less than 2,0 (AR=l,0) for a field strength of H=l62.
kA/m using a magnetic permeability indicator per ASTM A342/A342M,method 3.
3Screws shall be free from burrs and slivers. Break sharp edges 0,1 to 0,4. Loose chipsshal1 be removed from sockets .
Dimensions in millimetres unless otherwise indicated
5Socket end of screw shall be flat and chamfered, Chamfer shall extend to the minordiameter of the thread and the edge between flat and chamfer shall be slightlyrounded, Chamfer may be omitted on screws having a length equal to or less than theirnominal diameter .
6.Hexagon sockets shall conform to ASME/ANSI B1836M
PROCUREMENTSPECIFICATION:
Point cone angle (W) applies only to those portiong of the cone which lie inside theroot diameter of the thread, Angle (W) equals 45° to 50 except when screw length isless than nominal screw diameter, then (W) equals 30 to 350
ACCEPTABILITY OF SCREW THREADS SHALL BE IN ACCORDANCE WITH PED-STD-H28/20 SYSTEM 22NA0026 exceptmechanical properties shall not apply. Socket torsional strength shallbe tested per ASME/ANSI B18.3.6M and shall withstand 60 percent of the test tighteningtorque valuesspecified therein.
DIMENSIONING AND TOLERANCING PER ASME Y14.5M

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