What the 303-17499-3 Does
The Lincoln 303-17499-3 outlet closure plug blanks unused outlets on SSV and SSVD progressive divider-valve metering devices. This aftermarket replacement uses the same M10 x 1.0 thread and integrated sealing edge to close off outlet positions that are not feeding a lubrication point. Lincoln is a trademark of its respective owner. This is an aftermarket plug, not manufactured, sponsored, or endorsed by Lincoln. 303-17499-3 designations are for cross-reference identification only. The plug is not a universal Quicklub part, it belongs to SSV/SSVD metering device outlets.
Specifications
| Part number | 303-17499-3 |
| Type | Outlet closure plug / closure screw with integrated sealing edge |
| Thread | M10 x 1.0 metric fine |
| Material | Steel, zinc-plated with black chromated finish |
| Sealing | Integrated sealing edge, no gasket required |
| Hex | SW5 socket or hex key |
| Length | About 4.5 mm |
| Weight | About 4.5 g |
| Max system pressure | 350 bar per SSV/SSVD metering device |
| Temperature range | -25°C to +70°C |
The Integrated Sealing Edge
The steel 303-17499-3 plug seals metal-to-metal against the valve outlet face using its integrated sealing edge. No gasket or O-ring is required for this steel version. The gasket-free claim applies to the steel plug only; the stainless 303-19346-2 version uses the 219-13798-3 O-ring. As long as the sealing edge is undamaged, the plug provides a fresh metal-to-metal seal every time it is removed and reinstalled.
Which Systems It Fits
Primary fitment is SSV and SSVD progressive divider-valve metering devices. The plug is also listed as compatible for VPK, VPB, HP/HPG, and QLS installations that use SSV metering devices, including QLS 301, 311, and 421. These listings are provided for reference, so confirm fitment for your unit. See the SSV divider valve replacement guide for valve identification and outlet layout details.
Installation
Thread the plug into the unused outlet until seated. Use a 5 mm hex key and tighten to approximately 18 Nm, or 13 ft-lbs. Do not exceed 20 Nm. The integrated sealing edge does the sealing work, so no gasket, sealant, or additional washer is needed for this steel plug.
Related Outlet Parts
For corrosive environments, the stainless steel 303-19346-2 version is the declared family alternative. That stainless plug uses the 219-13798-3 O-ring, available as a spare seal. For controlled outlet flow to 6 mm tube, the outlet check valve assembly replaces a plug instead of blanking the outlet. The 504-30345-2 check valve assembly covers 4 mm tube outlets. Blanking plugs and check valves serve different functions within progressive lubrication systems. Request a quotation at the quotation form for specific outlet hardware combinations.
Frequently Asked Questions
Does this plug need a gasket or O-ring?
No, the steel 303-17499-3 uses an integrated sealing edge for metal-to-metal sealing. The 219-13798-3 O-ring belongs only to the stainless 303-19346-2 version.
What torque should I use for this closure plug?
Tighten to about 18 Nm using a 5 mm hex key. Do not exceed 20 Nm during installation.
Which systems actually fit this plug?
SSV and SSVD metering devices are the primary fitment. VPK, VPB, HP/HPG, and QLS are listed as compatible, but confirm your unit.
Is this a universal Quicklub part?
No, this plug is not a universal Quicklub part. It belongs to SSV/SSVD metering device outlets specifically.
What is the difference between this plug and the 504-30344-4 check valve?
The plug blanks an unused outlet completely and stops flow. The 504-30344-4 check valve controls outlet flow to a 6 mm tube.
When should I choose the stainless 303-19346-2 version instead?
Choose the stainless 303-19346-2 version for corrosive environments where black chromated steel may degrade. That stainless plug needs the 219-13798-3 O-ring for sealing.
What thread form does this plug use?
The thread is M10 x 1.0 metric fine. It is not a coarse M10 thread or an NPT thread.
Can this plug close a 6 mm tube outlet directly?
No, this plug blanks the valve outlet port itself. For a 6 mm tube outlet, use the 504-30344-4 check valve assembly.
Is this a Lincoln factory part?
No, this is an aftermarket plug made to replace the Lincoln 303-17499-3. It is not manufactured, sponsored, or endorsed by Lincoln.
How do I get a quotation or technical support?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
For volume pricing or outlet hardware combinations, use the quotation form. A support engineer will verify fitment for your metering device.
