PartsTable
Technical Data Sheet
SIZE57A ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, length_under_shoulder: 1.000 INCHES NOMINAL IN, open_end_inside_diameter: 3.300 INCHES NOMINAL IN, closed_end_overall_diameter: 3.090 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-290-7223, 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.

WHERE IT FITS
SIZE57A
NSN: 5340-00-290-7223
FSC: 5340
CAGE: 95760 — PROTECTIVE CLOSURES CO INC (USA)
SPECIFICATIONS
materialPLASTIC
length_under_shoulder1.000 INCHES NOMINAL IN
open_end_inside_diameter3.300 INCHES NOMINAL IN
closed_end_overall_diameter3.090 INCHES NOMINAL IN
NSN5340-00-290-7223
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SIZE57A MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
OPEN END INSIDE DIAMETER: 3.300 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER: 3.090 INCHES NOMINAL IN
LENGTH UNDER SHOULDER: 1.000 INCHES NOMINAL IN
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS (FLIS)
OPEN END INSIDE DIAMETER3.300 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER3.090 INCHES NOMINAL IN
LENGTH UNDER SHOULDER1.000 INCHES NOMINAL IN
MATERIALPLASTIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
MILC52078Upgraded Successor
successor cross-reference
successor
22SUpgraded Successor
successor cross-reference
successor
M5501/7-F38Upgraded Successor
successor cross-reference
successor
917966Upgraded Successor
successor cross-reference
successor
6735707-24Upgraded Successor
successor cross-reference
successor
17Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SIZE57A?
SIZE57A is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace SIZE57A?
There are 23 known substitutes for SIZE57A: MILC52078, 22S, M5501/7-F38 and 20 more. Substitute compatibility should be verified for your specific system.
Is SIZE57A still available?
SIZE57A is currently cancelled.
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