1、INCHPOUND AA59789A 27 April 2010 SUPERSEDING AA59789 26 March 2006 COMMERCIAL ITEM DESCRIPTION HOLDER, ELECTRICAL CARD, WEDGE RETAINERS, 5 PIECE, FOR COLD PLATE APPLICATIONS, GENERAL REQUIREMENTS FOR The General Services Administration has authorized the use of this commercial item description for a
2、ll federal agencies. 1. SCOPE. This commercial item description (CID) covers the general requirements for a family of 5 piece wedge card holders for holding circuit card assemblies into their installed positions when used in heat sinking devices (cold plates, heat exchanger) or other applications. C
3、ard holders covered by this CID are intended to provide maximum contact between thermal paths on the circuit card assemblies to the heat sink surfaces, and to provide increased resistance to loosening due to shock and vibration. Requirements for specific card holders are covered in the individual CI
4、D specification sheets. Card holders covered by this CID are intended for commercial/industrial applications. 2. CLASSIFICATION/PART IDENTIFICATION NUMBER (PIN). This CID uses a classification system which is included in the Part Identification Number (PIN) as shown in the following example (see 7.1
5、). AA59789 CID number /20 Applicable CID sheet * Configuration * Finish * * Length * Mounting 3. SALIENT CHARACTERISTICS. 3.1 Interface and physical dimensions. Card holders supplied to this CID shall be as specified on the applicable CID specification sheet. 3.2 CID specification sheet. The family
6、of card holders for use on circuit card assemblies shall be in accordance with the requirements specified herein and the applicable CID specification sheet. In the event of conflict between this general CID and the applicable CID specification sheet, the latter shall govern. 3.3 Material. Materials
7、shall be as specified herein and on the applicable CID specification sheet. 3.3.1 Body and wedges. The body and wedge material shall be aluminum alloy 6061 temper T6 in accordance with ASTM B221, SAE AMSQQA200/8, or equivalent. Beneficial comments, recommendations, additions, deletions, clarificatio
8、ns, etc. and any data that may improve this document should be sent to: Defense Supply Center, Columbus, ATTN: DSCCVAC, Post Office Box 3990, Columbus, OH 432183990, facsimile (614) 6931642, or electronic mail at 5998.Documentsdla.mil. Since contact information can change, you may want to verify the
9、 currency of the address information using the ASSIST Online database at https:/assist.daps.dla.mil/. AMSC N/A FSC 5998 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AA59789A 2 3.3.2 Rear wedge thread reinforcement (when applicable). The rear wedge
10、 thread reinforcement (captive nut or helical insert) material shall stainless steel in accordance with ASTM A582/A582M or equivalent. 3.3.3 Cup. The cup material for visual indicators shall stainless steel in accordance with ASTM A240/A240M, ASTM A582/A582M, or equivalent. 3.3.4 Flat washer. The fl
11、at washer shall comply with AIA/NAS NAS 620 or equivalent. 3.3.6 Lockwasher. The lockwasher shall comply with AIA/NAS NASM35338, AIA/NAS NAS 1676, or equivalent. 3.3.7 Screw. The screw material shall be stainless steel in accordance with SAE AMSQQS763, ASTM A484/A484M, ASTM A582/A582M, or equivalent
12、. 3.3.8 Screw retention lock nut (when applicable). When screw retention is specified, the lock nut used shall comply with AIA/NAS NASM21043 or equivalent. 3.3.9 Spring, . The spring material for visual indicators shall be stainless steel in accordance with ASTM A313/A313M, ASTM A580/A580M, or equiv
13、alent. 3.3.10 Alignment springs. The alignment spring (when needed) shall be either beryllium copper in accordance with ASTM B194, or stainless steel in accordance with SAE AMS 5904, or equivalent. 3.4 Configurations. Card holders are available with many options that determine its configurations. Th
14、e individual options of a particular card holder are specified on the applicable CID specification sheet. Listed below is a compilation of the most popular options. 3.4.1 Lockwasher and flat washer. A lockwasher and flat washer located under the screw head will provide for additional resistance to l
15、oosening from shock and vibration. Unless otherwise inherent to the design of the card holder, on those where a lockwasher and flat washer are an option, a configuration identifier shall be included in the PIN. 3.4.2 Screw selflocking element. The use of a screw self-locking element will provide pre
16、vailing torque for resistance to loosening from shock vibration. Unless otherwise specified, the self-locking element shall comply with AIA/NAS NAS1283, MILDTL18240, or equivalent. Card holders requiring a screw self-locking element shall include a configuration identifier in the PIN. 3.4.3 Facing (
17、left or right). Some card holders require a facing suffix to denote their unique orientation when properly installed on a circuit card assembly. These card holders are available for mounting in either the left hand or right hand position. Unless otherwise specified, left facing card holders shall in
18、clude a configuration identifier “L“ in the PIN. Unless otherwise specified, right facing card holders shall include a configuration identifier “R“ in the PIN. 3.5 Finish. 3.5.1 Stainless steel parts (when applicable). Stainless steel parts shall be subjected to passivation treatment in accordance w
19、ith SAE AMS 2700, MILS5002, or equivalent. 3.5.2 Beryllium copper parts (when applicable). Beryllium copper parts shall be finished in accordance with SAE AMSQQN290, Class 1, Grade G, Bright or equivalent. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
20、,-,-AA59789A 3 3.5.3 Aluminum parts. Unless otherwise specified, all aluminum parts shall be finished as specified in 3.5.3.1.1 through 3.5.3.3.2, inclusive. Finish designators shall be as specified in table I and on the applicable CID specification sheet or equivalent. A finish designator shall be
21、included in the PIN. TABLE I. Card holder finishes for aluminum parts and PIN designators. Finish designator Finish Reference document (or equivalent) Paragraph B W Q H D Anodize, black Anodize, red Anodize, black with dry film lubricant Anodize, hard black Anodize, hard black with dry film lubrican
22、t MILA8625, Type II, Class 2 MILA8625, Type II, Class 2 MILA8625, Type I or II, Class 2 and MILPRF46010 (for dry film lubricant) MILA8625, Type III, Class 2 MILA8625, Type III, Class 2 and MILPRF46010 (for dry film lubricant) 3.5.3.1.1 3.5.3.1.2 3.5.3.1.3 3.5.3.1.4 3.5.3.1.5 C R Chemical film, gold
23、Chemical film, clear MILDTL5541, Class 1A MILDTL5541, Class 1A 3.5.3.2.1 3.5.3.2.2 E P Nickel, electroless Nickel, electrodeposited SAE AMSC26074, Grade B, Class 4 SAE AMSQQN290, Class 1, Grade G, Bright 3.5.3.3.1 3.5.3.3.2 3.5.3.1 Anodize. Anodized coatings are intended to provide surface corrosion
24、 resistance and have good dielectric properties. Two types of anodized finishes are available for extractors fabricated of aluminum, thin anodize, and thick (or hard) anodize. A thin anodized coating applied to aluminum wedge bodies provides good surface corrosion protection and medium abrasion resi
25、stance. A hard anodized coating applied to the aluminum wedge bodies provides excellent surface corrosion and abrasion resistance under severe service conditions. 3.5.3.1.1 Black anodized. Black anodize finish shall be in accordance with MILA8625, Type II, Class 2 or equivalent. Black anodized finis
26、h assemblies shall include a finish designator “B“ in the PIN. 3.5.3.1.2 Red anodized. Red anodize finish shall be in accordance with MILA8625, Type II, Class 2 or equivalent. Black anodized finish assemblies shall include a finish designator “W“ in the PIN. 3.5.3.1.3 Black anodized with dry film lu
27、bricant. Dry film lubricant applied over black anodize is for the reduction of wear and friction. Black anodize finish shall be in accordance with MILA8625, Type I or Type II, Class 2 or equivalent. Dry film lubricant shall be in accordance with MILPRF46010, Type I or equivalent. Black anodized with
28、 dry film lubricant finish assemblies shall include a finish designator “Q“ in the PIN. 3.5.3.1.4 Hard black anodized. Hard black anodized finish provides excellent surface corrosion and abrasion resistance under severe service conditions. Hard black anodize finish shall be in accordance with MILA86
29、25, Type III, Class 2 or equivalent. Hard black anodized finish assemblies shall include a finish designator “H“ in the PIN. 3.5.3.1.5 Hard black anodized with dry film lubricant. Dry film lubricant applied over hard black anodize is for the reduction of wear and friction. Hard black anodize finish
30、shall be in accordance with MILA8625, Type III, Class 2 or equivalent. Dry film lubricant shall be in accordance with MILPRF46010 or equivalent. Hard black anodized with dry film lubricant finish assemblies shall include a finish designator “D“ in the PIN. Provided by IHSNot for ResaleNo reproductio
31、n or networking permitted without license from IHS-,-,-AA59789A 4 3.5.3.2 Chemical film. Chemical film finishes are primarily used for corrosion resistance where lower electrical resistance is required. Two types of chemical film finishes are available for devices fabricated of aluminum. A low elect
32、rical resistance chemical film finish, class 3, applied to aluminum provides good surface corrosion protection and medium abrasion resistance. A thicker but less conductive chemical film finish, class 1A, applied to aluminum extractors provides better surface corrosion and abrasion resistance under
33、severe service conditions than class 3 chemical film finish. 3.5.3.2.1 Chemical film, gold. Gold chemical film finish shall be in accordance with MILDTL5541, Class 1A or equivalent. Gold chemical film finish assemblies shall include a finish designator “C“ in the PIN. 3.5.3.2.2 Chemical film, clear
34、. Clear chemical film finish shall be in accordance with MILDTL5541, Class 1A or equivalent. Clear chemical film finish assemblies shall include a finish designator “R“ in the PIN. 3.5.3.3 Nickel. Two different nickel finishes are available for the aluminum parts of card holders, electroless and ele
35、ctrodeposited nickel. Electroless nickel finish provides a hard and smooth surface and protects aluminum and aluminum alloys from corrosion, oxidation and wear. Electrodeposited nickel finish protects metals against corrosive attack in rural, industrial, and marine atmospheres and offers high hardne
36、ss for wear and low friction. 3.5.3.3.1 Nickel, electroless. Electroless nickel finish shall be in accordance with SAE AMSC26074, Grade B, Class 4 or equivalent. Electroless nickel finish assemblies shall include a finish designator “E“ in the PIN. 3.5.3.3.2 Nickel, electrodeposited. Electrodeposite
37、d nickel finish shall be in accordance with SAE AMSQQN290, Class 1, Grade G, Bright or equivalent. Electrodeposited nickel finish assemblies shall include a finish designator “P“ in the PIN. 3.6 Interface and physical dimensions. The card holders shall be as specified herein and the applicable CID s
38、pecification sheet. 3.6.1 Expanded and relaxed dimensions. Expanded and relaxed dimensions shall be as specified in the applicable CID specification sheet. 3.6.2 Card holder length. Unless otherwise specified, the card holder length shall be the length of the body and wedge assembly in its relaxed s
39、tate. The lengths available for a particular card holder shall be listed on the applicable CID specification sheet. Card holder length designator shall be included in the PIN. See table II for primary length designators for card holders 10 inches (254 mm) or greater in length. Examples of length des
40、ignation (13th and 14th characters of PIN) are underlined below: 2.30 inch (58.4 mm) card holder = AA59789/01BN23W; 7.60 inch (193.0 mm) card holder = AA59789/02BN76W; 11.50 inch (292.1 mm) card holder = AA59789/03BNB5W. TABLE II. Primary length designators for card holders 10 inches (254 mm) or lon
41、ger. PIN designation Primary length, inches PIN designation Primary length, inches A B C D 10 (254 mm) 11 (279 mm) 12 (305 mm) 13 (330 mm) E F G H 14 (356 mm) 15 (381 mm) 16 (406 mm) 17 (431 mm) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AA59789
42、A 5 3.6.3 Mounting options. The mounting options shall be as specified in 3.6.3.1 through 3.6.3.5, inclusive. Mounting option designators shall be included in the PIN (see table III). When mounting holes are required, the number of holes and their location on the card holder mounting body shall be a
43、s specified on the applicable CID specification sheet. TABLE III. Mounting hole options and PIN designators. PIN designation Hole description Number of holes N No holes (for adhesive mounting) 0 R Rivet mount holes; counterbore and countersunk through holes 2 or more T Tapped 080 UNF 2B holes 2 or m
44、ore S Tapped 256 UNC 2B holes 2 or more V Tapped 440 UNC 2B holes 2 or more U Tapped, metric M2 x 0.4 holes 2 or more M Tapped, metric M2.5 x 0.45 holes 2 or more Y Tapped, metric M3 x 0.5 holes 2 or more P Index pins 2 or more 3.6.3.1 No mounting holes. The no mounting holes option is intended to b
45、e used when card holders are to be mounted with adhesives. Card holders not having mounting holes shall include a mounting designator “N“ in the PIN (see table III). 3.6.3.2 Rivet mounting holes (counterbore and countersunk through holes). The holes used for rivet mounting shall be of the diameter,
46、countersunk angle, depth, and counterbore diameter (when applicable) specified on the applicable CID specification sheet. Card holders using rivet mount holes shall include a mounting designator “R“ in the PIN (see table III). 3.6.3.2.1 Rivet dimensions. The rivet styles typically used when rivet mo
47、unting holes is specified are depicted on figure 1. 3.6.3.3 Tapped holes. Tapped holes shall be 080 UNF, 256 UNC, or 440 UNC through holes. Card holders using tapped holes shall include a mounting designator “T“, “S“, or “V“, respectively in the PIN (see table III). 3.6.3.4 Tapped holes, metric. Met
48、ric tapped holes shall be 2 mm x 0.4 mm (.08 x .016), 2.5 mm x 0.45 mm (.098 x .018), or 3 mm x 0.5 mm (.12 x .019) through holes. Card holders using metric tapped holes shall include a mounting designator “U“, “M“, or “Y“, respectively in the PIN (see table III). 3.6.3.5 Index pins. Index pins deta
49、ils shall be specified on the applicable CID specification sheet. Card holders using index pins shall include a mounting designator “P“ in the PIN (see table III). 3.6.4 Actuating screw. Unless otherwise specified on the applicable CID specification sheet, the screw shall have a internal hex socket
