MIL-PRF-49462C
INTERNATIONAL ORGANIZATION for STANDARDS (ISO)
- Equipment, Quality Assurance Requirements for Measuring - Part 1,
Meteorological Confirmation System for Measuring Equipment.
(Copies of this document are available from https://www.iso.org/ or from the American National
Standards Institute, 11 West 42nd Street, New York, NY 10036.)
NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL)
- Calibration Laboratory and Measuring and Test Equipment, General
Requirements for.
(Copies of this document are available from https://www.ncsli.org/ or from the National Conference of
Standards Laboratories (NCSL) International, 1800 30th Street, Suite 305, Boulder, CO 80301-1026.)
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2.4 Order of precedence. Unless otherwise noted herein or in the event of a conflict between the text
of this document and the references cited herein (except for related specifications), the text of this
document takes precedence. Nothing in this documents, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and in
accordance with the applicable specification sheet. In event of any conflict between the requirements of
this specification and the specification sheet, the latter shall govern.
3.2 Qualification. Resistors furnished under this specification shall be products which are authorized
by the qualifying activity for listing on the applicable Qualified Products List (QPL) at the time of award of
3.3 Material. The material shall be as specified herein. However, when a definite material is not
specified, a material shall be used which will enable the resistors to meet the performance requirements
of this specification. Acceptance or approval of any constituent material shall not be construed as a
guaranty of the acceptance of the finished product. Material shall be corrosion resistant or shall be
processed to resist corrosion.
3.4 Interface and physical dimension requirements. Resistors shall meet the interface and physical
dimensions as specified (see 3.1).
3.4.1 Terminals. Terminal leads shall be free of foreign material and solderable in the clean lead to
clean lead area. Leads shall be judged to be free of foreign material if the visual criteria are met (see
3.9).
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3.4.1.1 Pure tin. The use of pure tin, as an underplate or final finish is prohibited both internally and
externally. Tin content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall
be alloyed with a minimum of 3 percent lead, by mass (see 6.4).
3.4.1.2 Solder dip (retinning) leads. The manufacturer may solder dip/retin the leads of product
supplied to this specification provided the solder dip/retin process (see appendix A) has been approved
by the qualifying activity.
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