QOOSIKICC 150 Pcs 2.8/4.8/6.3mm Quick Splice Male and Female Wire Spade Connectors, Wire Crimp Terminal Block Assortment Kit with Insulating Sleeve, for Electrical Wiring Car Audio Speaker Connectors

First impressions and what’s in the box

I keep a bin of terminals in the shop, but I like having a dedicated, grab‑and‑go kit for quick electrical jobs. This 150‑piece QOOSIKICC spade connector kit fits that role well: a compact case with the common spade sizes (2.8 mm, 4.8 mm, 6.3 mm), a handful of 4.0 mm round connectors, and both long and short nylon sleeves. Everything’s easy to identify at a glance, and there’s enough variety to handle small electronics, car audio, and appliance repairs without rummaging for oddball parts.

The spades are tin‑plated brass, which is what I expect in a value‑oriented assortment. The plating is even and consistent on the pieces I used; no bare spots or rough edges out of the box. The nylon sleeves are clearer and stiffer than typical PVC shrouds, and they don’t collapse when you slide them over a freshly crimped terminal. That alone avoids a lot of frustration when you’re working in tight quarters behind a dashboard or inside a cabinet.

A quick breakdown of what I relied on most:
- 2.8 mm (0.110 in) spades for small switches and PCB tabs
- 4.8 mm (0.187 in) spades for many automotive accessories and audio components
- 6.3 mm (0.250 in) spades for higher‑draw circuits like relays and power inputs
- 4.0 mm round connectors for inline, quick‑separate runs in light harnesses

Build quality and crimping experience

These are open‑barrel, non‑insulated quick‑disconnects designed for a double crimp: one set of wings on the conductor, a second on the insulation. With the right crimper, that style gives a compact, mechanically strong connection that’s easy to inspect.

Crimping results:
- With a dedicated open‑barrel/F‑crimp tool, I got consistent, factory‑looking crimps on 22–16 AWG wire for the 2.8 mm and 4.8 mm spades, and 16–14 AWG for the 6.3 mm parts.
- Using a generic stamped crimper intended for red/blue/yellow insulated terminals worked in a pinch, but it’s easy to over‑flatten the barrel or miss the insulation support. If you’re buying this kit, pair it with a proper open‑barrel die. It makes all the difference.

Material thickness is on the lighter side compared with premium, OEM‑grade spades from TE/AMP or Molex. The trade‑off is that the brass forms easily and grips well with modest hand force, but it also means I wouldn’t choose these for high‑vibration, high‑current, or mission‑critical connections. For general wiring, they’re absolutely serviceable.

The tin plating held up fine to repeated insertions; the male/female pairs slide together with a positive click. Mating force feels right—snug enough to resist accidental separation, not so tight that you fight them under a dashboard. The nylon sleeves seat fully and cover the live metal; the longer sleeves give more strain relief on exposed runs, while the short sleeves are great in cramped spaces.

Real‑world use

I put the kit to work on three jobs:

1) Car audio retrofit (’60s dashboard)
- Task: Add spade disconnects to a new radio harness and mate to the car’s existing switched power, ground, and speaker leads.
- Result: The 4.8 mm and 6.3 mm spades fit the vehicle’s original tabs and modern head unit accessories without fuss. The long sleeves prevented accidental shorts against the metal dash. After a month of driving, no intermittents or loosening.

2) E‑bike accessory wiring
- Task: Inline disconnects for lights and a horn so I can remove the handlebars without cutting wires.
- Result: I used the 2.8 mm spades and a few of the 4.0 mm round connectors. They made tight, tidy connections and kept the harness compact. I added a dab of dielectric grease for weather resistance; these aren’t sealed, so that’s worth doing if you ride in the wet.

3) Small appliance switch replacement
- Task: Replace worn spades on a toaster oven’s thermostat and element connections.
- Result: The 6.3 mm terminals were a direct replacement. The nylon sleeves handled the appliance’s heat better than PVC, and there’s zero discoloration after several heating cycles.

Across those jobs, crimps passed a simple tug test, and voltage drop was negligible on modest loads (up to ~10–12 A on 6.3 mm terminals with 16 AWG). For higher currents, I’d step up to heavier‑gauge wire and thicker terminals.

Limitations to keep in mind

• Material thickness: The terminals are thinner than automotive OEM or marine‑grade parts. They’re fine for general use, but I wouldn’t rely on them behind a firewall for a fuel pump, in an engine bay near heavy vibration, or for anything where a failure has high consequences.
• Not weather‑sealed: The nylon sleeves are protective but not watertight. For outdoor, marine, or underbody use, add heat‑shrink tubing (adhesive‑lined if possible) or choose sealed connectors.
• Wire gauge window: The barrels suit common hobby/automotive sizes, but very fine wire (28–26 AWG) and very heavy wire (12 AWG and larger) are not a good match. Plan your runs accordingly.
• Storage box: The included case is compact and keeps parts separate, but it’s unlabeled. I added a small chart inside the lid with sizes and recommended wire gauges to speed things up.

Tips for best results

• Use the right tool: A ratcheting open‑barrel crimper with the correct die makes clean, repeatable crimps and preserves the plating. Orient the seam down in the die, crimp conductor first, then the insulation support.
• Strip length matters: Aim for just enough copper to sit fully inside the conductor barrel without stray strands poking out. For these, 2.5–3.0 mm of stripped length worked well on 18–16 AWG.
• Support the wire: Slide the nylon sleeve on before crimping. After the crimp, push the sleeve until it seats and covers the interface. For exterior use, slip adhesive heat‑shrink over the sleeve and shrink it to improve moisture resistance.
• Test before you tuck: Give every crimp a firm pull test and check continuity before final installation. It’s much easier to re‑crimp on the bench than inside a door card or dash.

Value and assortment coverage

For the price of a couple of coffee shop runs, this kit covers the three spade sizes you’re most likely to encounter, plus round connectors that are handy for inline disconnections. The inclusion of both male and female ends in each size means you can standardize your harnesses and keep serviceability in mind. If you do a lot of one specific size, you’ll eventually run that compartment down faster than the others, but as a general‑purpose kit, the balance is sensible.

Compared with premium terminals, you’re trading some material heft and long‑term ruggedness for quantity and convenience. That’s a reasonable trade for indoor appliances, audio projects, bench work, and light automotive circuits. If you routinely wire critical systems, keep a stash of heavier‑duty spades alongside this kit.

Who it’s for

• DIYers and hobbyists who need a reliable, budget‑friendly assortment for everyday wiring
• Car audio installers and tinkerers doing head units, speakers, and accessories
• Appliance repairers replacing switches, thermostats, and element connections
• E‑bike and scooter owners who want tidy, serviceable disconnects on accessories

Who should look elsewhere:
- Marine, off‑road, and under‑hood applications that demand sealed, heavy‑gauge, or locking terminals
- Professional harness builders who require thick‑stock, OEM‑spec components for high‑vibration environments

Bottom line

The QOOSIKICC spade connector kit earns a place on my bench. The terminals crimp cleanly with the right tool, the nylon sleeves are genuinely useful, and the size mix covers most of the small to medium connections I make in vehicles, appliances, and electronics. The lighter material means I reserve them for non‑critical circuits and add sealing when moisture is a concern, but within those bounds they’ve been dependable.

Recommendation: I recommend this kit for general wiring, car audio, household appliance repairs, and hobby electronics. It’s a good value, easy to use, and thoughtfully assorted. If your work involves high vibration, high current, or harsh environments, supplement it with heavier‑duty, sealed connectors—but keep this kit on hand for everything else.