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MIL-P-18682D(SH)
TABLE I.
Materials. - Continued
Hardware or subassembly parts which are used in a major pump part listed in
table I and which perform the same or similar functions as the major part
(e.g., casing drain plug) shall be of a material specified for the major
part.
Detail drawings and lists of material shall reference the specifications
actually followed in each case, and shall include the class, type, or grade
of material used in each case, as applicable (see 3.3 and 3.6.2.1).  ASTM
materials shall not be used for submarine submergence boundary parts.
Yield strength at 0.5 percent extension under 18,000
minimum,
48,000
maximum.
Design of bolts, studs, and nuts shall be in accordance with MIL-S-1222.
Nickel-copper-aluminum threaded fasteners shall be as specified in MS18116.
Nickel-copper alloy shall not be used for both male and female threaded
members in the same assembly.  If bolts and studs in accordance with QQ-N-281,
class A, are used, they shall be hot finished for submarine application. Any
nickel-copper bolts and studs made of cold drawn, stress-relieved material
for use in submarine pump parts, shall be in accordance with MIL-N-24106,
class C in lieu of QQ-N-281.
21

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