MIL-D-537F
National Stock Number
Item Identification
6630-01-151-6417
Comparator Set, Color,
Chlorine-Bromine and
pH Determination
6.6 Part or Identifying system. The part or identifying number (PIN) is definitive and
formatted to identify each item covered by this specification. The part number in formatted by
selecting from the requirement options available in this specification as follows (see 3.6.1):
M
537
X
X
Prefix
An item defined by
inch-pound (US)
units
Specification number
(Do not include the revision
letter or activity symbol).
Type
(See 6.6.1)
Class
(See 6.6.2)
Examples: M537A1 - Disk, Color Standard, pH, Range 3.0 to 4.6
6.6.1 Type of disk. A one-position alpha field used to designate the type of disk required.
Type I disks shall be designated "A". Type II disks shall be designated "B".
6.6.2 Class of disk. A one-position numeric field used to designate the class of disk required
(see 1.2).
6.7 Subject term (key word) listing.
Color comparator
pH
Residual chlorine
Custodian:
Preparing activity:
Army - ME
Army - ME
Navy - YD
Air Force - 99
Project 6630-0516
Review activity:
Army - MD
18
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