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3-3781-301 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3-3781-301: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE BODY, overall_height: 0.500 INCHES NOMINAL IN, material_thickness: 0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN, base_inside_diameter: 0.500 INCHES NOMINAL IN, base_outside_diameter: 0.690 INCHES NOMINAL IN, end_item_identification: MOBILE SUBSCRIBER EQUIPMENT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-265-8636, 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
3-3781-301
NSN: 5340-01-265-8636
FSC: 5340 — Hardware, Commercial
CAGE: 76854 — ELECTRO SWITCH CORP. DBA OAK GRISGSBY DIV ELECTROSWITCH (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
overall_height0.500 INCHES NOMINAL IN
material_thickness0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
base_inside_diameter0.500 INCHES NOMINAL IN
base_outside_diameter0.690 INCHES NOMINAL IN
end_item_identificationMOBILE SUBSCRIBER EQUIPMENT
material_document_and_classificationZZ-P-765,CLASS 2B FED SPEC SINGLE MATERIAL RESPONSE BODY
NSN5340-01-265-8636
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3-3781-301 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ZZ-P-765,CLASS 2B FED SPEC SINGLE MATERIAL RESPONSE BODY
•
MATERIAL THICKNESS: 0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
•
BASE INSIDE DIAMETER: 0.500 INCHES NOMINAL IN
•
BASE OUTSIDE DIAMETER: 0.690 INCHES NOMINAL IN
•
MATERIAL: RUBBER SILICONE BODY
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-P-765,CLASS 2B FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIAL THICKNESS0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
BASE INSIDE DIAMETER0.500 INCHES NOMINAL IN
BASE OUTSIDE DIAMETER0.690 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMOBILE SUBSCRIBER EQUIPMENT
MATERIALRUBBER SILICONE BODY
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
755090A0157-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3-3781-301?
3-3781-301 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace 3-3781-301?
There is 1 known substitute for 3-3781-301: 755090A0157-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-3781-301?
3-3781-301 is cataloged in the U.S. Government catalog under NSN 5340-01-265-8636. This indicates validated use in U.S. government and defense supply chains.
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