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SIZE2-20 — CAP-PLUG,PROTECTIVE,DUST AND MOI

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SIZE2-20: CAP-PLUG,PROTECTIVE,DUST AND MOI.

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, length_under_shoulder: 1.000 INCHES NOMINAL IN, open_end_inside_diameter: 2.070 INCHES NOMINAL IN, closed_end_overall_diameter: 1.975 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-290-7239, 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
SIZE2-20
NSN: 5340-00-290-7239
NIINs: 002907239, 009644007
FSC: 5340 — Hardware, Commercial
CAGE: 99017 — CAPLUGS LLC DBA MOKON DIV CAPLUGS (USA)
SPECIFICATIONS
materialPLASTIC
length_under_shoulder1.000 INCHES NOMINAL IN
open_end_inside_diameter2.070 INCHES NOMINAL IN
closed_end_overall_diameter1.975 INCHES NOMINAL IN
NSN5340-00-290-7239
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SIZE2-20 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
•
CLOSED END OVERALL DIAMETER: 1.975 INCHES NOMINAL IN
•
LENGTH UNDER SHOULDER: 1.000 INCHES NOMINAL IN
•
OPEN END INSIDE DIAMETER: 2.070 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
TECHNICAL CHARACTERISTICS
CLOSED END OVERALL DIAMETER1.975 INCHES NOMINAL IN
LENGTH UNDER SHOULDER1.000 INCHES NOMINAL IN
OPEN END INSIDE DIAMETER2.070 INCHES NOMINAL IN
MATERIALPLASTIC
SUBSTITUTES & CROSS-REFERENCES 3
MILC52078Reference document
Same NSN cross-reference
Reference document — Identification reference
2491644Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
220Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SIZE2-20?
SIZE2-20 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace SIZE2-20?
There are 3 known substitutes for SIZE2-20: MILC52078, 2491644, 220. Substitute compatibility should be verified for your specific system.
What is the NSN for SIZE2-20?
SIZE2-20 is cataloged in the U.S. Government catalog under NSN 5340-00-290-7239. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.