1、INCHPOUND AA59590C 28 February 2010 SUPERSEDING AA59590B 28 April 2005 COMMERCIAL ITEM DESCRIPTION HOLDER, ELECTRICAL CARD, WEDGE RETAINERS, 3 PIECE, FOR COLD PLATE APPLICATIONS, GENERAL REQUIREMENTS FOR The General Services Administration has authorized the use of this commercial item description f
2、or all federal agencies. 1. SCOPE. This commercial item description (CID) covers the general requirements for a family of 3 piece card holders that use screw actuated wedge retainers to hold circuit card assemblies into their installed positions in heat sinking devices (cold plates, heat exchanger,
3、etc.) or other applications. Card holders covered by this CID are intended to provide maximum contact between thermal paths on the circuit card assemblies and the heat sink surfaces and to provide resistance to shock and vibration. Requirements for specific card holders are covered in the individual
4、 CID specification sheets. Card holders covered by this CID are intended for commercial/industrial applications. 2. CLASSIFICATION/PART OR IDENTIFICATION NUMBER (PIN). This CID uses a classification system which is included in the Part Identification Number (PIN) as shown in the following example (s
5、ee 7.1). AA59590 CID number /25 Applicable CID sheet * Finish * Mounting * * Length * Configuration 3. SALIENT CHARACTERISTICS. 3.1 Interface and physical dimensions. Card holders supplied to this CID shall meet the interface and physical dimensions as specified herein and on the applicable CID spec
6、ification sheet. 3.2 CID specification sheet. The family 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
7、 sheet, the latter shall govern. 3.3 Material. Materials shall be as specified herein and on the applicable CID specification sheet. However, when a definite material is not specified, a material shall be used which will enable the card holder to meet the performance requirements of this CID and the
8、 applicable CID specification sheet. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should
9、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 currency of the address information using the ASSIST Online
10、 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-,-,-AA59590C 2 3.3.1 Body and wedges. The body and wedge material shall be aluminum alloy in accordance with ASTM B221, SAE AMSQQA200/8, or equiva
11、lent. 3.3.2 Captive nut (when applicable). The captive nut material shall stainless steel in accordance with ASTM A582/A582 or equivalent. 3.3.3 Cup. The cup material for visual indicators shall stainless steel in accordance with ASTM A240/A240M, ASTM A582/A582, or equivalent. 3.3.4 Flat washer. The
12、 flat washer shall comply with AIA/NAS NAS 620 or equivalent. 3.3.5 Lockwasher. The lockwasher shall comply with AIA/NAS NAS M35338, AIA/NAS NAS 1676, or equivalent. 3.3.6 Screw. The screw material shall be stainless steel in accordance with SAE AMSQQS763, ASTM A484/A484M, ASTM A582/A582, or equival
13、ent. 3.3.7 Screw retention lock nut (when applicable). When screw retention is specified, the lock nut used shall comply with AIA/NAS M21042, AIA/NAS M21043, or equivalent. 3.3.8 Spring. The spring material for visual indicators shall be stainless steel in accordance with ASTM A313/A313M, ASTM A580/
14、A580, or equivalent. 3.4 Finish. Finish shall be as specified herein and on the applicable CID specification sheet. 3.4.1 Aluminum parts. Unless otherwise specified, all aluminum parts shall be finished as specified in 3.4.2 through 3.4.2.4 inclusive. Finish designators shall be as specified in tabl
15、e I and on the applicable CID specification sheet. A finish designator shall be included in the PIN. 3.4.2 Anodize. Anodized coatings are intended to provide surface corrosion resistance and have good dielectric properties. Two types of anodized finishes are available for extractors fabricated of al
16、uminum, thin (or regular) anodize, and thick (or hard) anodize. A thin anodized coating applied to aluminum extractors provides good surface corrosion protection and medium abrasion resistance. A hard anodized coating applied to aluminum extractors provides excellent surface corrosion and abrasion r
17、esistance under severe service conditions. 3.4.2.1 Black anodized. Black anodize finish shall be in accordance with MILA8625, type II, class 2, or equivalent. Card holders assemblies with black anodized finished aluminum parts shall include a suffix “B“ in the PIN. 3.4.2.2 Red anodized. Red anodize
18、finish shall be in accordance with MILA8625, type II, class 2 ,or equivalent. Card holders assemblies with red anodized finished aluminum parts shall include a suffix “F“ in the PIN. 3.4.2.3 Hard black anodized. Hard black anodize finish shall be in accordance with MILA8625, type III, class 2, or eq
19、uivalent. Card holders assemblies with hard black anodized finished aluminum parts shall include a suffix “H“ in the PIN. 3.4.2.4 Hard black anodized with dry film lubricant. Dry film lubricant applied over hard black anodize is for the reduction of wear and friction. The hard black anodize finish s
20、hall be in accordance with MILA8625, type III, class 2, or equivalent. The dry film lubricant shall be in accordance with MILPRF46010 or equivalent. Card holders assemblies with hard black anodized with dry film lubricant finished aluminum parts shall include a suffix “D“ in the PIN. Provided by IHS
21、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-AA59590C 3 3.4.3 Chemical film. Chemical film finishes are primarily used for corrosion resistance where lower electrical resistance is required. A thicker, less conductive chemical film finish in accordance with MILD
22、TL5541, type II, class 1A, applied to aluminum extractors provides better surface corrosion and abrasion resistance under severe service conditions than class 3 chemical film finish. 3.4.3.1 Chemical film, clear. Chemical film finish shall be in accordance with MILDTL5541, type II, class 1A, or equi
23、valent. Card holders assemblies with clear chemical film finished aluminum parts shall include a suffix “R“ in the PIN. 3.4.3.2 Chemical film, gold. Gold chemical film finish shall be in accordance with MILDTL5541, type II, class 1A, or equivalent. Card holders assemblies with gold chemical film fin
24、ished aluminum parts shall include a suffix “C“ in the PIN. 3.4.4 Nickel. Two types of nickel finishes are available for the aluminum parts of card holders. Electroless nickel deposits are used typically to provide a uniform build-up on intricate shapes whereas electrolytic plated nickel is less uni
25、form in thickness on but provides higher hardness and corrosion resistance. 3.4.4.1 Nickel, electroless. Electroless nickel finish provides a hard and smooth surface and protects aluminum and aluminum alloys from corrosion, oxidation and wear. Electroless nickel finish shall be in accordance with SA
26、E AMSQQN290, SAE AMS 2404, or equivalent. Card holders assemblies with electroless nickel finished aluminum parts shall include a suffix “E“ in the PIN. 3.4.4.2 Nickel, electrodeposited. Electrodeposited nickel finish protects metals against corrosive attack in rural, industrial, and marine atmosphe
27、res and offers high hardness for wear and low friction. Electrodeposited nickel finish shall be in accordance with, SAE AMS 2403 or equivalent. Card holders assemblies with electrodeposited nickel finished aluminum parts shall include a suffix “P“ in the PIN. 3.4.5 Stainless steel parts (when applic
28、able). Stainless steel parts shall be subjected to passivation treatment in accordance with SAE AMSQQP35, MILS5002, SAE AMS 2700, or equivalent. TABLE I. Card holder finishes. Finish Designator Finish Reference document (or equivalent) Paragraph B Anodize, black MILA8625, type II, class 2 3.4.2.1 F
29、Anodize, red MILA8625, type II, class 2 3.4.2.2 H Anodize, hard black MILA8625, type III, class 2 3.4.2.3 D Anodize, hard black, with dry film lubricant MILA8625, type III, class 2 and MILPRF46010 (for dry film lubricant) 3.4.2.4 C Chemical film, gold MILDTL5541, class 1A 3.4.3.1 R Chemical film, cl
30、ear MILDTL5541, class 1A 3.4.3.2 E Nickel, electroless SAE AMSQQN290 or SAE AMS 2404 3.4.4.1 P Nickel, electrodeposited SAE AMS 2403 3.4.4.2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AA59590C 4 3.5 Interface and physical dimensions. The card ho
31、lders shall be as specified herein and the applicable CID specification sheet. Tolerances, unless otherwise specified on the applicable CID specification sheet, shall be .010 (0.25 mm) for three place decimals and .02 (0.5 mm) for two place decimals. 3.5.1 Screw. The screw shall have an internal hex
32、 socket head for tool engagement and shall turn clockwise to secure the card holder and circuit card assembly into the applicable fixture. Unless otherwise specified, the internal hex socket head shall be .094 inch (2.38 mm) across flats. 3.5.2 Mounting options. The mounting options shall be as spec
33、ified in 3.5.2.1 through 3.5.2.5, inclusive. Mounting option designators shall be included in the PIN (see table II). 3.5.2.1 No mounting holes. No mounting holes option is intended to be used when card holders are to be mounted with adhesives. Card holders not having mounting holes shall include a
34、mounting designator “N“ in the PIN. 3.5.2.2 Mounting holes. When mounting holes are required, the holes shall be spaced as indicated in the applicable CID specification sheet. When specified on the applicable CID specification sheet, card holder assemblies greater than 6.00 inches (152.4 mm) in leng
35、th require additional mounting holes. TABLE II. Mounting options. PIN designation Hole description N No mounting holes (for adhesive mounting or brazing) J Counterbore through holes, 2 places T Tapped 080 UNF holes, 2 places V Tapped 256 UNC holes, 2 places K Counterbore through holes, 3 places R Ta
36、pped 080 UNF holes, 3 places S Tapped 256 UNC holes, 3 places F Tapped, metric 2 x 0.4 holes, 2 places G Tapped, metric 2.5 x 0.45 holes, 2 places L Tapped, metric 2 x 0.4 holes, 3 places M Tapped, metric 2.5 x 0.45 holes, 3 places 3.5.2.3 Rivet mounting holes (counterbore and countersunk through ho
37、les). Unless otherwise specified on the applicable CID specification sheet, counterbore holes shall be .066 to .073 inch (1.68 to 1.85 mm) diameter through holes, countersunk 100 degrees by .140 inch (3.56 mm) diameter with an access/clearance counter bore hole of .156 inch (3.97 mm) diameter by a d
38、epth specified in table III. Card holders using rivet mount holes shall include a mounting designator “J“ or “K“ in the PIN. 3.5.2.3.1 Rivet dimensions. The rivet styles typically used when rivet mounting holes is specified are depicted on figure 1. Provided by IHSNot for ResaleNo reproduction or ne
39、tworking permitted without license from IHS-,-,-AA59590C 5 figure 1 Inches mm Inches mm Inches mm Inches mm Inches mm .032 .048 0.81 1.22 .061 .065 1.55 1.65 .090 .124 2.29 3.15 .128 .135 3.25 3.43 .200 .236 5.08 5.99 NOTES: 1. Dimensions are in inches. Millimeters are given for general information
40、only. 2. Unless otherwise specified, tolerances are .02 inch (0.5 mm) for two place decimals and .010 inch (0.25 mm) for three place decimals. FIGURE 1. Suggested rivet dimension. TABLE III. Counter bore hole depth. Counter bore hole depth 1/ Applicable CID specification sheet .135 (3.43 mm) AA59590
41、/11 and /12 .160 (4.06 mm) AA59590/7, /8, /9, and /10 .200 (5.08 mm) AA59590/1, /2, /3, /4, /5, /6, /17, /18, /19, /20, and /25 .300 (7.62 mm) AA59590/13, /14, /15, and /16 .390 (9.91 mm) AA59590/21, /22, /23, and /24 1/ Dimensions are in inches. Millimeters, in parenthesis, are given for informatio
42、n only. 3.5.2.4 Tapped holes, unified inch screw threads. Tapped holes shall be 080 UNF or 256 UNC through holes in accordance with ASME B1.1 or equivalent. Card holders using unified inch screw thread tapped holes shall include the mounting designator “T“, “V“, “R“, or “S“, respectively in the PIN
43、(see table II). 3.5.2.5 Tapped holes, metric M screw threads. Metric tapped holes shall be metric 2 x 0.4 or metric 2.5 x 0.45 through holes in accordance with ASME B1.13 or equivalent. Card holders using metric M screw tapped holes shall include the mounting designator “F“, “G“, “L“, or “M“, respec
44、tively in the PIN (see table II). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AA59590C 6 3.5.3 Expanded and relaxed dimensions. Expanded and relaxed dimensions shall be as specified in the applicable CID specification sheet. 3.5.4 Card holder len
45、gth. Unless otherwise specified, the card holders length shall be the length of the body and wedge assembly (not to include hardware protrusion) in its relaxed state. The lengths available for a particular card holder shall be listed on the applicable CID specification sheet. Card holders length des
46、ignator shall be included in the PIN. Examples of length designation (13thand 14thcharacters of PIN) are underlined in the PINs listed below: 1.80 inch (45.7 mm) card holder = AA59590/05CN18W; 3.00 inch (127.0 mm) card holder = AA59590/05CN30W; 8.30 inch (170.2 mm) card holder = AA59590/05CN83W. 3.5
47、.5 Configuration Card holders may have various configurations on a particular specification sheet. The exact configuration of a card holder is determined by what optional hardware is needed for the application. Listed below is a compilation of the most common hardware options available on most of th
48、e specification sheets associated with this CID. 3.5.5.1 Lockwasher and flat washer. A lockwasher and flat washer located under the screw head will provide for additional resistance to loosening from shock and vibration. Card holders requiring a lockwasher and flat washer option shall include a suffix “W“ in the PIN. 3.55.2 Screw selflocking element. The use of a screw self-locking element will provide prevailing torque for resistance to loosening from shock vibration. Unless otherwise specified, the self-locking element shall comply with MILDTL18240 or equiva
