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NAS820-28A — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

NAS820-28A: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, POLYETHYLENE (PP), design_type: FRICTION, overall_diameter: 1.844 INCHES MINIMUM AND 1.906 INCHES MAXIMUM IN, inside_diameter_length: 0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN, round_cap_outside_surface_condition: SMOOTH, material_document_and_classification: L-P-39, TYPE 1, CLASS L FED SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-463-2553, 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
NAS820-28A
NSN: 5340-00-463-2553
NIINs: 004632553, 010419514
FSC: 5340 — Hardware, Commercial
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
design_typeFRICTION
overall_diameter1.844 INCHES MINIMUM AND 1.906 INCHES MAXIMUM IN
inside_diameter_length0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
round_cap_outside_surface_conditionSMOOTH
material_document_and_classificationL-P-39, TYPE 1, CLASS L FED SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed1.638 INCHES MINIMUM AND 1.658 INCHES MAXIMUM IN
NSN5340-00-463-2553
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS820-28A 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 1.900 INCHES NOMINAL IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.665 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
•
INSIDE DIAMETER LENGTH: 0.625 INCHES NOMINAL IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER1.900 INCHES NOMINAL IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.665 INCHES NOMINAL IN
MATERIALPLASTIC
INSIDE DIAMETER LENGTH0.625 INCHES NOMINAL IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NAS820-28A?
NAS820-28A is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for NAS820-28A?
NAS820-28A is cataloged in the U.S. Government catalog under NSN 5340-00-463-2553. 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.