Quicksilver #10 Stainless Lock Washer 26996 | Mercury MerCruiser OEM | Pack of 15
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Quicksilver OEM #10 Stainless Lock Washer — Part No. 26996 / 13-26996
- Part Number: 26996
- Service Format: 13-26996
- Brand: Quicksilver (Genuine Mercury Marine OEM)
- Type: Lock Washer — Split / Internal Tooth
- Fastener Size: #10 (approx. 0.190 in. / 4.83 mm screw diameter)
- Material: Stainless steel
- Pack Quantity: 15 washers
- GTIN / UPC: 745061078154
- System: Electrical hardware / Fasteners — broad Mercury and MerCruiser application
What This Part Does
This genuine OEM stainless lock washer prevents terminal screws and nuts from loosening under vibration and thermal cycling in Mercury and MerCruiser electrical and hardware assemblies. Mercury parts diagrams show 26996 used extensively on water-temperature senders, oil-pressure senders, starter solenoids, rectifiers, alternators, ignition modules, reverse-lock valve hardware, and circuit-breaker mounting hardware.
Size note: 26996 is Mercury’s #10 stainless lock washer. Do not substitute it for visually similar Mercury lock washers used with #8 or 1/4-inch hardware. Confirm the correct fastener size in the Mercury parts diagram for your specific assembly before ordering.
Pack note: This listing is a 15-piece sales pack. Mercury diagrams typically list 26996 individually per assembly position — the 15-piece quantity is a convenience format, not the number used in any one engine.
Compatible Applications
- Water-temperature sender terminal hardware
- Oil-pressure sender terminal hardware
- Starter solenoid terminal screws
- Rectifier mounting screws
- Alternator hardware
- Ignition module terminal fasteners
- Reverse-lock valve hardware
- Circuit-breaker mounting hardware
- Any Mercury or MerCruiser assembly where the parts diagram specifies 26996 / 13-26996
Always confirm the exact diagram position using your engine model and serial number before ordering.
Superseded / Legacy Part Numbers
The following older Mercury numbers are cataloged as superseded into current part 26996:
- 13-26996 (current service format)
- 13-33027
- 13-33253
- 13-46627
- 13-F1975
- 54-33271
- 13-20040
- 13-82208M
- 13-F8059
When to Replace
- Lock washer has lost spring tension or is flattened
- Corrosion or distortion visible
- Washer damaged during disassembly
- Sender, solenoid, or electrical terminal being rebuilt or replaced
- Mercury service procedure calls for fresh retaining hardware
Installation Notes
- Confirm the terminal or screw size is #10 before fitting
- Clean corrosion from mating terminal surfaces before reassembly
- Install the washer in the same position shown in the Mercury diagram
- Tighten to the torque specified in the Mercury service manual for the assembly
- Avoid over-tightening on senders and solenoid terminals — these are often brass or soft alloy and can strip
- Lock washers are single-use — do not reuse a washer that has already been compressed
Related Products
- Quicksilver Lockwasher 8M0204647 (.312 in.) | Mercury MerCruiser OEM Hardware
- Mercury MerCruiser Quicksilver Lockwasher (.437) 39131
- Mercury MerCruiser Quicksilver Lockwasher (.750) 68102
- Fasteners & Mounting Hardware
Parts Desk Insights
26996 is one of Mercury’s most frequently recurring lock washers precisely because it covers so many electrical terminal locations across so many engines. The stainless construction is the right choice for the damp, salt-exposed environment around senders and solenoids. The key ordering mistake to avoid is confusing it with the #8 washer used on nearby, smaller terminals — they look similar but are not interchangeable. Having a pack of 15 on hand is practical for any shop doing multiple Mercury services, since these washers are single-use and should be replaced every time a terminal is opened.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.