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NEWS | July 22, 2019

M53A1 Mask: Technical Manual Released

TM 3-4240-552-13&P (Oct 18) includes the repair parts and special tools list for the following mask sizes:

M53A1 (Right) NSN 4240-
Extra Small 01-646-2614
Small 01-646-2709
Medium 01-646-2699
Large 01-646-2625
M53A1 (Left) NSN 4240-
Extra Small 01-646-2717
Small 01-646-2646
Medium 01-646-2637
Large 01-646-2683
TM distribution is restricted, so you’ll need to log in with your CAC to:
Choose the “ETM/IETM” app and search for the TM.

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