MIL-PRF-39002/1G
c.
Packaging requirements (see 5.1).
6.3 Type designation. The type designation for identifying these parts is as follows:
NOTE: This is for information only. For the correct PIN, see 1.2.
RK09
SA
C
S
101
Style
Shaft and type
Resistance temperature
Terminal
Resistance
(6.3.1)
mounting
characteristic
(6.3.4)
(6.3.5)
(6.3.2)
(6.3.3)
6.3.1 Style. The style is identified by the two letter symbol "RK" followed by a two digit number; the letters identify
semi-precision wire-wound, variable resistors, and the number identified the physical size.
6.3.2 Shaft and type mounting. The style of shaft, type of mounting, and length of shaft is identified by a two letter
symbol. The first letter indicates the style of shaft and type of mounting and the second letter indicates the length of
shaft, see MIL-PRF-39002.
6.3.3 Resistance temperature characteristic. The resistance temperature characteristic of the completed resistor
is identified by a single letter, see MIL-PRF-39002.
6.3.4 Terminals. The terminals are identified by a single letter, see MIL-PRF-39002.
6.3.5 Resistance. The nominal total resistance value expressed in ohms is identified by a three digit number; the
first two digits represent significant figures and the last digit specified the number of zeros to follow, see
6.4 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit tin
whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to years after manufacture
and can develop under typical operating conditions, on products that use such materials. Conformal coatings applied
over top of a whisker-prone surface will not prevent the formation of tin whiskers. Alloys of 3 percent lead, by mass,
have shown to inhibit the growth of tin whiskers. For additional information on this matter, refer to ASTM-B545
(Standard Specification for Electrodeposited Coatings of Tin).
6.5 Changes from previous issue. The margins of this specification are marked with vertical lines to indicate
where changes from the previous issue were made. This was done as a convenience only and the Government
assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to
evaluate the requirements of this document based on the entire content irrespective of the marginal notations and
relationship to the last previous issue.
Custodian:
Preparing activity:
Army - CR
DLA - CC
DLA - CC
Review activity:
(Project 5905-2010-024)
Army - AR
NOTE: The activities listed above were interested in this document as of the date of this document. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Online database at https://assist.daps.dla.mil.
9
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business