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99208309 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

99208309: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, design_type: FRICTION, overall_diameter: 1.559 INCHES MINIMUM AND 1.621 INCHES MAXIMUM IN, special_features: ITEM MADE PER MIL-B-81705, TY I, COLOR BLACK, inside_diameter_length: 0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN, round_cap_outside_surface_condition: SMOOTH. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-443-6853, 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
99208309
NSN: 5340-01-443-6853
FSC: 5340 — Hardware, Commercial
CAGE: F6481 — THALES SA (FRA)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter1.559 INCHES MINIMUM AND 1.621 INCHES MAXIMUM IN
special_featuresITEM MADE PER MIL-B-81705, TY I, COLOR BLACK
inside_diameter_length0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN
round_cap_outside_surface_conditionSMOOTH
tube_outside_diameter_for_which_designed1.330 INCHES MINIMUM AND 1.350 INCHES MAXIMUM IN
NSN5340-01-443-6853
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 99208309 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: 1.559 INCHES MINIMUM AND 1.621 INCHES MAXIMUM IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.330 INCHES MINIMUM AND 1.350 INCHES MAXIMUM IN
•
MATERIAL: PLASTIC
•
INSIDE DIAMETER LENGTH: 0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER1.559 INCHES MINIMUM AND 1.621 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.330 INCHES MINIMUM AND 1.350 INCHES MAXIMUM IN
SPECIAL FEATURESITEM MADE PER MIL-B-81705, TY I, COLOR BLACK
MATERIALPLASTIC
INSIDE DIAMETER LENGTH0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
SUBSTITUTES & CROSS-REFERENCES 3
SAE-AS85049/138Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
MS90376-22RBReference document
Same NSN cross-reference
Reference document — Secondary reference
M85049/138-45CReference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 99208309?
99208309 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 99208309?
There are 3 known substitutes for 99208309: SAE-AS85049/138, MS90376-22RB, M85049/138-45C. Substitute compatibility should be verified for your specific system.
What is the NSN for 99208309?
99208309 is cataloged in the U.S. Government catalog under NSN 5340-01-443-6853. 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.