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3IN D.O.C. — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3IN D.O.C.: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: ALUMINUM ALLOY 3003, design_type: FRICTION, overall_diameter: 3.040 INCHES NOMINAL IN, tube_outside_diameter_for_which_designed: 3.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-299-2962, 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
3IN D.O.C.
NSN: 5340-01-299-2962
FSC: 5340 — Hardware, Commercial
CAGE: 2A316 — THE LYNCH CO INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 3003
design_typeFRICTION
overall_diameter3.040 INCHES NOMINAL IN
tube_outside_diameter_for_which_designed3.000 INCHES NOMINAL IN
NSN5340-01-299-2962
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3IN D.O.C. 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: 3.040 INCHES NOMINAL IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 3.000 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 3003
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER3.040 INCHES NOMINAL IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED3.000 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 3003
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
3IN D.0.C.Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 3IN D.O.C.?
3IN D.O.C. is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 3IN D.O.C.?
There is 1 known substitute for 3IN D.O.C.: 3IN D.0.C.. Substitute compatibility should be verified for your specific system.
What is the NSN for 3IN D.O.C.?
3IN D.O.C. is cataloged in the U.S. Government catalog under NSN 5340-01-299-2962. 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.