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4491K16 — CAP-PLUG,PROTECTIVE,DUST AND MOI

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4491K16: CAP-PLUG,PROTECTIVE,DUST AND MOI.

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, POLYETHYLENE (PP), length_under_shoulder: 0.563 INCHES NOMINAL IN, closed_end_overall_diameter: 0.75 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: HOLLOW TAPERED PLUG. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-689-4031, 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
4491K16
NSN: 5340-01-689-4031
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
length_under_shoulder0.563 INCHES NOMINAL IN
closed_end_overall_diameter0.75 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyHOLLOW TAPERED PLUG
NSN5340-01-689-4031
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4491K16 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
•
CLOSED END OVERALL DIAMETER: 0.75 INCHES NOMINAL IN
•
LENGTH UNDER SHOULDER: 0.563 INCHES NOMINAL IN
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS
CLOSED END OVERALL DIAMETER0.75 INCHES NOMINAL IN
LENGTH UNDER SHOULDER0.563 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYHOLLOW TAPERED PLUG
MATERIALPLASTIC, POLYETHYLENE (PP)
SUBSTITUTES & CROSS-REFERENCES 1
31000-463Reference 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 4491K16?
4491K16 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace 4491K16?
There is 1 known substitute for 4491K16: 31000-463. Substitute compatibility should be verified for your specific system.
What is the NSN for 4491K16?
4491K16 is cataloged in the U.S. Government catalog under NSN 5340-01-689-4031. This indicates validated use in U.S. government and defense supply chains.
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