1、MIL-C-172CAMENDMENT 615 February 2001SUPERSEDINGAMENDMENT 220 October 1966MILITARY SPECIFICATIONCASES; BASES, MOUNTING; AND MOUNTS VIBRATION (FORUSE WITH ELECTRONIC EQUIPMENT IN AIRCRAFT)This amendment forms a part of MIL-C-172C, dated 9 December 1958, and is approvedfor use by all Departments and A
2、gencies of the Department of Defense.The USAF Interim Amendments 3, 4, and 5; dated 16 Jan 1970, 1 Oct 1971, and14 Feb 1977 respectively, were canceled by Notice 1, dated 15 January 1995.PAGE 3* 3.2: Delete and substitute:“3.2 First article inspection . When specified (see 6.2), a sample shall be su
3、bjected to firstarticle inspection in accordance with 4.4.”PAGE 53.5.2.1: Delete and substitute:“3.5.2.1 Locking devices .“3.5.2.1.1 Safety wiring . Safety wiring, passing through holes provided for that purpose inthe thumb nuts or wing nuts of the fastener assembly and in the mounting base, shall b
4、e used toprevent loosening thereof under vibration.AMSC N/A 1 o f 4 FSC 5975DISTRIBUTION STATEMENT A . Approved for public release; distribution is unlimited .INCH-POUNDINACTIVE FOR NEW DESIGN AFTER 18 SEPTEMBER 1996Provided by IHSNot for ResaleNo reproduction or networking permitted without license
5、 from IHS-,-,-MIL-C-172CAMENDMENT 62“3.5.2.1.2 Automatic locking devices . For all Air Force procurement only automatic lockingdevices shall be use in all cases, bases, and mounts to prevent loosening thereof under vibration.Dimensions shall be within the envelope shown in figure 6. For Army and Nav
6、y procurementautomatic looking may be used provided they are specified by the procuring activity.”Insert figure 6:* CLEARANCE ON OPEN OR EXTENDED POSITION 1-3/8 MINIMUM FORDIMENSION A* THIS DIMENSION SHALL BE NO GREATER THAN NECESSARY TO MEETTHE MINIMUM CLEARANCE OF DIMENSION AMATERIAL: CORROSION-RE
7、SISTANT STEELALL DIMENSIONS IN INCHESFIGURE 6. Automatic locking device .Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-172CAMENDMENT 63* 4.1(b)1: Delete “Qualification” and substitute “First article.”PAGE 11* 4.4: Delete “Qualification” and s
8、ubstitute “First article.”Table I: Delete “Qualification” and substitute “First article.”PAGE 186.2: Insert the following:“( l) For mounting bases, the type of locking device shall be specified (see 3.5.2.1).”* “(m) When first article is required (see 3.2).”PAGE 19* 6.3: Delete.PAGE 2230.2(a): Inser
9、t the following:“5. If the submission includes front clamp ass emblies equipped with automatic lockingdevices, and further includes a tray and vibration mounts which have already been tested togetheras a mounting base with conventional front clamp assemblies, as a result of a previous submissionunde
10、r the provisions of 30.2, first article inspection of the base will consist only of visual anddimensional inspection, salt spray, and shock (4.6.5.3 only).”NOTE: The margins of this amendment are marked with asterisks to indicate where changes fromthe previous amendment were made. This was done as a
11、 convenience only and the Governmentassumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractorsare cautioned to evaluate the requirements of this document based on the entire contentirrespective of the marginal notation and relationships to the last previous amen
12、dment.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-172CAMENDMENT 64Custodians: Preparing activity:Army - CR Navy - ASNavy ASAir Force - 11 (Project 5975 -1336)Review activities:Army AR, AV, MIAir Force 99DLA - GSProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
