Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW
CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC VINYL, design_type: FRICTION, special_features: WRAP AROUND LIP FOR SECURING TO FLANGE; COLOR YELLOW, inside_diameter_length: 0.750 INCHES NOMINAL IN, round_cap_outside_surface_condition: SMOOTH, tube_outside_diameter_for_which_designed: 5.250 INCHES NOMINAL IN. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-280-6340, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
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FREQUENTLY ASKED QUESTIONS
What is 138640?
138640 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 138640?
There are 7 known substitutes for 138640: MC4701, B94.19 TABLE 7, SM-B-157211 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 138640?
138640 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-280-6340. This indicates validated use in U.S. government and defense supply chains.
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