Octo HOB Collection Cup Nylon Screw 1=1
SKU: ROP-SCRW-BH
- Genuine OEM Direct Replacement: Authentic factory-spec nylon thumbscrew designed specifically to fit the collection cup height adjustment brackets on Reef Octopus hang-on back protein skimmers.
- Corrosion-Proof Marine Hardware: Fabricated entirely from lightweight, dense nylon polymer that will never rust, pit, lock up, or leach heavy metals into reef aquarium water.
- Ergonomic Knurled Head Design: Engineered with a textured, oversized thumbscrew head for effortless finger-tight adjustments without needing specialized tools or screwdrivers.
- Non-Marring Thread Matrix: Gentle plastic threads lock securely against clear acrylic skimmer necks without gouging, scratching, or stress-fracturing the primary reservoir walls.
- Precise Height Tuning Control: Allows you to quickly lock the collection cup at the perfect elevation to stabilize wet or dry foam production.
- Toolless Drop-In Restoration: Directly replaces stripped, cross-threaded, or lost factory cup screws to instantly secure your collection cup drop alignment.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus HOB Collection Cup Replacement Nylon Thumbscrew
The Reef Octopus HOB Collection Cup Nylon Screw is a genuine factory-direct OEM replacement mounting component distributed by CoralVue to preserve the exact skim-height calibrations of your hang-on back protein skimmer. On an external hang-on back skimmer layout, controlling your foam extraction relies entirely on manually raising or lowering the collection cup inside the main reactive neck. This nylon thumbscrew threads right through the structural mounting collar or O-ring alignment guide block, pressing gently against the clear acrylic body to clamp the cup firmly into place.
Because this hardware component operates directly over the humid sump line or external tank rim, standard metal bolts are completely unusable due to instantaneous rust and toxic heavy-metal oxidization risks. While industrial-grade nylon is perfectly reef-safe, these small screws are easily dropped during frantic collection cup washouts, or they can become cross-threaded if forced against a salt-crusted mounting block. When a screw goes missing or strips its fine plastic threads, the collection cup will slide down to its lowest possible seat, causing massive over-skimming and immediate cup overflows. Swapping out a damaged or missing fastener with this original factory component restores perfect friction locking, keeping your skimmer performing at its exact intended baseline.
Key Features
True Factory Sizing Tolerances: Molded to meet original factory pitch specifications to fit the threaded collars of the Classic HOB series perfectly.
Anti-Corrosive Polymer Core: Completely immune to salt crusting, calcium scale, and the harsh chemical environments common to marine filtration spaces.
Textured Perimeter Edge: Ribbed head profile provides substantial leverage for your fingertips, preventing slips when tightening with wet hands.
Blunt-Tip Safety Design: Spreads holding pressure evenly over the contact point to eliminate point-stress fractures on clear acrylic necks.
Verified Hardware Compatibility
Reef Octopus Classic HOB Series: Sized explicitly for the Classic 100HOB (BH-100) and Classic 1000HOB (BH-1000) hang-on back external skimmer lines.
Variant Family Fitments: Fits specialized BH-100 configurations including the BH-100SS, BH-100F, BH-100T, and BH-100R models featuring a threaded bracket locking block.
What’s Included:
(1) Reef Octopus Replacement HOB Collection Cup Locking Nylon Thumbscrew
(Note: Clear acrylic collection cups, collection cup lids, neck O-rings, and molded skimmer bodies are sold separately).
Technical Specs:
Official Manufacturing Title: Reef Octopus Nylon Thumbscrew for HOB Collection Cups
Hardware Profile: Threaded Machined Plastic Thumbscrew
Head Type Configuration: Knurled Circular Slotted Finger Grip Head
Material Matrix Composition: 100% Saltwater-Inert Reef-Safe Molded Nylon
Primary Function: Collection Cup Height Setting Lock Fastener
Turn off your hang-on back skimmer pump to stop active foam column production before messing with the cup alignment.
Carefully hold the main collection cup body with one hand to prevent it from sliding downwards into the skimmer body.
Thread the old, stripped, or damaged nylon screw counter-clockwise out of the mounting bracket loop and discard it.
Clean the threads inside the molded acrylic bracket collar with a soft damp towel to clear away any dried salt creep or calcium build-up.
Align your new replacement nylon screw with the opening and twist clockwise until the threads catch smoothly.
Slide your collection cup to your preferred operational depth, then tighten the nylon screw clockwise until it is finger-tight against the neck.
Pro Tips:
- Never Tighten This Nylon Screw with Tools or Pliers. This replacement screw is engineered to be locked down exclusively using finger pressure. Never use metal pliers, channel locks, or wrenches to force the screw tighter against the skimmer neck. Because nylon is softer than structural acrylic, using tools will immediately strip out the plastic threads or crack the clear acrylic mounting block on your skimmer body, turning a simple maintenance fix into an expensive equipment repair.
- Dissolve Hidden Salt Creep if Threads Feel Tight. If you insert the new screw and it binds up or feels hard to twist after only a couple of turns, do not force it down. The issue is almost always hidden salt creep or calcified hard-water deposits baked inside the hidden valleys of the internal bracket threads. Back the screw out, spray a little warm RO/DI water directly into the bracket hole, and run an old toothbrush through it to melt away the scale. The new screw will slide in smoothly without binding.
- Keep a Spare Hardware Set in Your Sump Cabinet. Nylon thumbscrews are small, lightweight, and incredibly slick when wet. They are one of the most common items dropped into deep sumps or lost down sink drains during a weekly skimmer cup rinse. Keeping one or two extra factory nylon screws stored in your dry cabinet organizer avoids a filtration crisis, ensuring you can quickly restore your skim-height settings rather than letting your skimmer sit idle while waiting for replacement shipments.