AIA/NAS 4117-2012 pdf download HEAT SINK, INSULATOR, WAFER TYPE
/a/ UNLESS OTHERWISE SPECIFIED, TOLERANCE IS ±.01 5 ON ALL DIMENSIONS EXCEPT THICKNESS.
/b/ UNLESS OTHERWISE SPECIFIED, THICKNESS SHALL BE .062 ±.004.
/c/ THICKNESS OF “1 7” SHALL BE .030 ±.003.
/d/ THICKNESS OF “34” SHALL BE .020 ±.003. THIS PART IS MADE FROM ALUMINUM ALLOY ONLY.
/e/ THICKNESS SHALL BE .005 TO .080, DEPENDING ON MATERIAL TYPE.
MATERIAL:
ALUMINUM ALLOY, TYPE 1 1 00 (UNS A91 1 00) PER QQ-A-250/1 ASTM B209, 3003 (UNS A93003) PER QQ-A-250/2 ASTM B209, OR 5052 (UNS A95052) PER QQ-A-250/8 AMS-QQ-A-250/8 (“01 ” THRU “1 4”, AND “34” ONLY).
BERYLLIUM OXIDE PER MIL-I-1 0, 99.5 PERCENT PURE (MINIMUM), WITH A FINAL DENSITY OF 2.80GRAMS PER CUBIC CENTIMETER (“1 5” THRU “33” ONLY). /1 3/
BORON NITRIDE-FILLED SILICONE RUBBER PER MIL-I-49456 ASTM D5470, ASTM D1 50, ASTM D257, ASTM D1 49 OR ASTM D792 (“35” THRU “71 ” ONLY).
ALUMINA-FILLED SILICONE RUBBER PER MIL-I-49456, TYPE II, GRADE 4, ASTM D5470, ASTM D1 50, ASTM D257, ASTM D1 49 OR ASTM D1 458 (“35” THRU “71 ” ONLY).
FINISH:
FOR ALUMINUM ALLOY:
HARD ANODIZE CONFORMING TO TYPE III OF MIL-A-8625. MINIMUM THICKNESS SHALL BE .001 AND THE COATING SHALL BE SODIUM DICHROMATE SEALED.
BERYLLIUM OXIDE, BORON NITRIDE-FILLED SILICONE RUBBER, ALUMINA-FILLED SILICONE RUBBER PARTS SHALL HAVE NO FINISH.
ADHESIVE:
CONFIGURATIONS “H” THROUGH “Z” ARE AVAILABLE WITH A PRESSURE-SENSITIVE ADHESIVE COATING (ACRYLIC OR SILICONE AT THE MANUFACTURER’S DISCRETION).
CODE:
MATERIAL CODES SHALL BE AS FOLLOWS:
“A” – ALUMINUM ALLOY
“B” – BERYLLIUM OXIDE
“C” – BORON NITRIDE-FILLED SILICONE RUBBER
“D” – ALUMINA-FILLED SILICONE RUBBER
ADHESIVE CODES SHALL BE AS FOLLOWS (CONFIGURATIONS “H” THROUGH “Z” ONLY):
NO CODE – NO ADHESIVE
“X” – ADHESIVE ON ONE SIDE
“Y” – ADHESIVE ON BOTH SIDES
EXAMPLE OF PART NUMBER:
NAS41 1 7 C 1 5 X = HEAT SINK-INSULATOR MADE OF BORON NITRIDE-FILLED SILICONE RUBBER;
ROUND SHAPE; ADHESIVE ON ONE SIDE.
ADHESIVE CODE
DASH NUMBER
MATERIAL CODE
BASIC PART NUMBER
NOTES:
(1 ) DIMENSIONS IN INCHES AND APPLY AFTER FINISH UNLESS OTHERWISE SPECIFIED.
(2) TOLERANCES UNLESS OTHERWISE SPECIFIED: DECIMALS ± .01 0; ANGLES ± 2° (“01 ” THRU “1 4” ONLY).
(3) UNLESS OTHERWISE SPECIFIED, THICKNESS IS .020 ± .004 (“01 ” THRU “01 4” ONLY).
(4) A .01 0 RADIUS ON CORNERS AND A 1 ” DRAFT ANGLE ON SIDES ARE ALLOWABLE (“01 ” THRU “1 4” ONLY).

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