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AFS-640

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AFS-640 ( afs-640 )

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AC 43.13-1B CHG 1 9/27/01 g. Monel rivets are used in special cases for riveting high-nickel steel alloys and nickel alloys. They may be used interchangeably with stainless steel rivets as they are more eas- ily driven. However, it is preferable to use stainless steel rivets in stainless steel parts. h. Copper rivets are used for riveting copper alloys, leather, and other nonmetallic materials. This rivet has only limited usage in aircraft. i. Hi-Shear rivets are sometimes used in connections where the shearing loads are the primary design consideration. Its use is re- stricted to such connections. It should be noted that Hi-Shear rivets are not to be used for the installation of control surface hinges and hinge brackets. Do not paint the rivets be- fore assembly, even where dissimilar metals are being joined. However, it is advisable to touch up each end of the driven rivet with primer to allow the later application of the general airplane finish. j. Blind rivets in the NASM20600 through NASM20603 series rivets and the me- chanically-locked stem NAS 1398, 1399, 1738, and 1739 rivets sometimes may be sub- stituted for solid rivets. They should not be used where the looseness or failure of a few rivets will impair the airworthiness of the air- craft. Design allowable for blind rivets are specified in MIL-HDBK-5. Specific structural applications are outlined in NASM33522. Nonstructural applications for such blind rivets as NASM20604 and NASM20605 are con- tained in NASM33557. CAUTION: For sheet metal repairs to air- frame, the use of blind rivets must be authorized by the airframe manufacturer or approved by a representative of the FAA. For more information on blind rivets, see page 4-19, f. of this document. 7-3.7-13. [RESERVED.] Page 7-2 Par 7-2

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