MS20756 Flange, Swivel, Retaining

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MS20756F

PIN example:

MS    20756      -W12      -W             

8lank for type I rectangle, type II hexagon for sizes 40 and 48 and round.

"2" for type II hexagon for sizes 8 through 32 only.

Material finish code (see table II)

Material and size number (see table I)

Specification number

MS prefix

MS20756-W12W indicates:  Flange, .750 inch (19.05 mm) tube ID, aluminum anodized with NAVAIR TCP, type I rectangle.

MS20756-W12-W2 indicates:  Flange, .750 inch (19.05 mm) tube ID, aluminum anodized with

NAVAIR TCP, type II hexagon.

MS20756-56-CN indicates:  Flange, 3.500 inch (88.90 mm) tube ID, Steel, cadmium plating in accordance with SAE-AMS-C-81562, type II, class 3 or SAE-AMS-QQ-P-416, type II, class 2 with NAVAIR TCP in accordance with MIL-DTL-81706, type II, class 1A round.

Marking.  The complete PIN shall be permanently marked on an unfinished surface. Guidance on use of alternative parts with less hazardous or nonhazardous materials.  This

specification provides for a number of alternative plating materials via the PIN.  Users should select

the PIN with the least hazardous material that meets the form, fit and function requirements of their application.

Supersession data:  Due to stress corrosion cracking aluminum alloys 2014 and 2024 "D" designator have been replaced by aluminum alloy 7075 "W" designator.

For nominal use on fuel and oil systems.

Changes from previous issue.  Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.

Referenced documents.  In addition to SAE-AS4875, this document references the following:

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