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Technical Data Sheet

M85049/138-27B — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

M85049/138-27B: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, POLYETHYLENE (PP), design_type: MOLDED, overall_height: 0.500 INCHES NOMINAL IN, special_features: WSDC: CXN: AIRCRAFT, OSPREY V-22A, MARINE CORPS A, supplementary_features: CONTRACT CONTROL NO: N00019-96-C-0054, end_item_identification: ELEC INST, NACELLE, RH; CAGE 97499. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-721-6433, 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
M85049/138-27B
NSN: 5340-01-721-6433
FSC: 5340 — Hardware, Commercial
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
design_typeMOLDED
overall_height0.500 INCHES NOMINAL IN
special_featuresWSDC: CXN: AIRCRAFT, OSPREY V-22A, MARINE CORPS A
supplementary_featuresCONTRACT CONTROL NO: N00019-96-C-0054
end_item_identificationELEC INST, NACELLE, RH; CAGE 97499
part_name_assigned_by_controlling_agencyCAP, PROTECTIVE, DUST
tube_outside_diameter_for_which_designed1.050 INCHES NOMINAL IN
NSN5340-01-721-6433
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M85049/138-27B 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: MOLDED
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.050 INCHES NOMINAL IN
•
SUPPLEMENTARY FEATURES: CONTRACT CONTROL NO: N00019-96-C-0054
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.500 INCHES NOMINAL IN
DESIGN TYPEMOLDED
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.050 INCHES NOMINAL IN
SUPPLEMENTARY FEATURESCONTRACT CONTROL NO: N00019-96-C-0054
SPECIAL FEATURESWSDC: CXN: AIRCRAFT, OSPREY V-22A, MARINE CORPS A
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP, PROTECTIVE, DUST
END ITEM IDENTIFICATIONELEC INST, NACELLE, RH; CAGE 97499
MATERIALPLASTIC, POLYETHYLENE (PP)
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS85049/138Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M85049/138-27B?
M85049/138-27B is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace M85049/138-27B?
There is 1 known substitute for M85049/138-27B: SAE-AS85049/138. Substitute compatibility should be verified for your specific system.
What is the NSN for M85049/138-27B?
M85049/138-27B is cataloged in the U.S. Government catalog under NSN 5340-01-721-6433. 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.