AN918 Rev 9
REQUIREMENTS:
Dimensions and configuration shall be in accordance with figure 1.
Materials and finishes shall be in accordance with SAE-AS4842, see table I for material code.
TABLE I. Material and code letters.
Code letter
Material
Blank
Copper alloy
J
Corrosion resistant steel (CRES), type 304
K
CRES, type 316
R
CRES, type 321
T 1/
Titanium
W
Aluminum alloy 7075-T73
1/ Not for use in oxygen systems.
PIN: The PIN consists of the prefix "AN" the specification sheet number, a dash number for pipe size,
and material code letter. Unassigned PIN's shall not be used.
AN918
-4
W
Material code letter (see table I)
Size dash number (see figure 1)
Specification sheet number
AN prefix
PIN example: AN918-4W indicates a cross, 1/2-14 ANPT internal pipe threads, aluminum alloy 7075-
T73.
Marking: Part shall be permanently marked with the AN PIN, and include the manufacturers CAGE,
name, or trademark.
Supersession data:
Due to stress corrosion cracking aluminum alloys 2014 and 2024 "D" designator has been
replaced by aluminum alloy 7075 "W" designator. Example: AN918-8D use AN918-8W.
Metal cracking due to high temperatures CRES alloy 347 "S" designator has been replaced by
CRES alloy 321 "R" designator. Example: AN918-8S use AN918-8R.
Table II provides a detailed cross-reference of cancelled AN918 PINs and replacement SAE-AS4858
PINs. Users are cautioned to evaluate replacements for their particular application.
CAUTION: The superseding information is valid as of the date of this specification and may be
superseded by subsequent revisions of the superseding document.
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