Snap-plug terminals—also called bullet terminals—make detachable, crimped wire-to-wire connections. The best choice is the one that matches your wire gauge and insulation diameter, mates with the correct plug, and is rated for the circuit and working conditions. There is no single snap-plug terminal that fits every wire or has one universal electrical rating.
What snap-plug terminals do
A snap-plug terminal has a male or female end that mates with its counterpart, allowing a wire connection to be disconnected for service. Molex describes these as solderless wire-to-wire and harness connections; its snap-in retention feature is intended to help resist accidental separation in applications exposed to shock or vibration. Molex identifies appliance and industrial uses where serviceability matters. Molex’s snap-plug terminal overview describes the product family.
These are not interchangeable with every terminal style. Ring and spade terminals are used at studs or device connections, while quick-disconnect terminals serve different connection layouts. Choose a snap plug when a detachable male/female wire-to-wire connection is what the equipment requires.
How to choose a snap-plug terminal
Match both wire gauge and insulation diameter
Start with the conductor’s gauge and the outside diameter of its insulation. Molex lists category-level ranges of 22–14 AWG wire size and 3.25–6.71 mm insulation diameter for its snap-plug products. Those figures do not mean every part in the category accepts every combination; check the selected part’s product data for its specific wire and insulation limits. See Molex’s solderless-terminals category.
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- You will recevice 110Pcs heat shrink bullet connectors kit, including 30pcs/30pcs AWG 22-16 male/female bullet connectors, 20pcs/20pcs AWG 16-14 male/female bullet connectors,5pcs/5pcs AWG 12-10 male/female bullet connectors
- Made with thick copper cores, our heat shrink bullet connectors provide excellent conductivity, ensuring a tight and secure fit. The enduring nylon housing is flame-retardant, high-temperature resistant, effectively protecting wires
- Heat shrink bullet wire connectors-allowing for quick and easy replacement of faulty components. The matching male and female connectors ensure a secure and reliable connection that can be repeatedly plugged and unplugged
- These bullet connectors offer superior protection with a waterproof and moisture-resistant seal. The heat shrinks and solidifies during shrinking, securely encapsulating the wire and providing excellent insulation without the need for tape
- Easily shrink these bullet wire connectors using a heat gun or even a lighter for quick and convenient application. Ideal for a wide range of applications, including automotive, marine, electrical wiring projects, and more
Confirm gender, fit, and dimensions
Check whether the wire needs a male plug or a female receptacle, then confirm the mating connector’s plug diameter and the exact connector family. “Bullet terminal” is a common synonym, not a dimensional standard: two products with that name are not necessarily compatible.
Choose insulation and crimp style for the application
Available options include insulated and noninsulated terminals, with sleeve materials and construction varying by product. Molex names Avikrimp (brass sleeve), InsulKrimp (rigid PVC sleeve), Krimptite (butted seam), and Perma-Seal (heat-shrink sleeve) variants. McMaster-Carr lists vinyl, nylon, noninsulated, and heat-shrink-insulated versions, as well as single- and double-crimp options. Treat these as product choices, not a ranking: use the chosen terminal’s documentation to determine which construction suits the installation.
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- Standard Materials - Copper + PVC+ Tinplate. Wire Range: AWG 22-16 (Red), AWG 16-14 (Blue), AWG 12-10 (Yellow)
- Package Included - 840PCS Wire Terminals - rings, forks, butts, semi-insulated male spades, semi-insulated female spades, fully-insulated female spades, male bullets, female bullets, piggy back crimp terminal connectors.
- Strong Copper Barrel to hold the wire tight when crimped. Copper is an extremely powerful electrical conductor which can easily withstand a range of temperatures and resists corrosion.
- Various Applications - A handy assortment of terminals connectors comes with all you need to make quick solderless electrical repairs around home, garage, workshop or outside.
- Friendly Customer Service & Warranty - We stand behind the quality of our products. If for any reason you are not satisfied with your purchase, please do not hesitate to contact us. Thank you~
For a heat-shrink type, McMaster-Carr describes crimping first and applying heat afterward to seal the sleeve. Follow the instructions for the specific manufacturer and part rather than assuming that sequence or any particular heat method applies universally. See McMaster-Carr’s snap-plug terminal listings and descriptions.
Verify electrical and environmental ratings
Connector shape alone does not establish suitability. Check the selected part’s published voltage, current, temperature, and other applicable ratings, along with its environmental limitations and the equipment maker’s wiring instructions. The cited sources do not establish one voltage, current, temperature, or safety certification for all snap-plug terminals.
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Quick Recap
Best Value
- ▸Package Included: 320 PCS Heat Shrink Male/Female Bullet Connectors with plastic storage case, make your wire connections easier.
- ▸Premium Material: Our marine grade crimp ring connectors are made of thick seamless RED copper barrel, which could help to increase current flow, provide less voltage instability and reduce wiring failures and reducing equipment downtime, wire will never slip out of the connectors.
- ▸Wide Application: Heat shrink bullet terminals are commonly preferred in automotive sector as well as trailer, car stereo, radio, RV, motorcycle, vehicle, DIY repair and many other home or scientific wiring projects.
- ▸Durable and Waterproof Heat Shrink Connectors: Heat activated adhesive creates an airtight seal and protects wires from corrosion. Double wall design, 3:1 shrink ratio to provide high tensile strength and resistance to weather stretch and mechanical damage.
- ▸Easy Idenfication: Color-coded tubing with wire gauge AWG 22-16, 16-14, 12-10 imprinted for easy to identify the right size. Measure your wire, and easily choose the right connector by looking at wire gauge imprint on polyolefin tubing.
Rank #4
- Tin plating on the connector surface to form an oxide film, which is anti-oxidative and anti-corrosion, ensures，making them suitable for various environments and extending service life
- The insulating sleeve is made of PVC insulating material, which is flame retardant and insulation design ensures safety；This combination contains various types of male and female terminals, with a total of 27 types to meet various daily needs
- The red, blue and yellow connectors have codes on them, and the cable ranges of the crimp connectors can be identified by the colors and codes: AWG 22-16 (red), AWG 16-14 (blue) , AWG 12-10 (yellow),AWG18-14,M4-#8,M5-#10,M6-1/4
- Equipped with a beautiful hand box, it is easy to use, can be carried at any time, and can also be used as a toolbox；Crimping tool has crimping function, which can crimp wire connectors correctly every time
- Spade Connectors are ideal for home and automotive applications, as well as industry requirements covering marine, domestic, industrial, and more.At the same time, it is equipped with crimping pliers, which is convenient and fast to use, and a set of tools directly meets daily needs
Rank #3
- [Fast Connection] Insert the wires to be connected, crimp the male and female bullet connectors with crimping pliers, and then heat with a heat gun. You can connect the wire in a few seconds. Save you time and improve work efficiency.
- [Thicken tinned copper material ensures long-lasting performance] Premium tinned copper material ensure great conductivity. Seamless copper barrel design, translucent heat shrink tubing eliminates the problem of the barrel opening. Your wire will never slip out of the connector.
- [IP67 Waterproof level] Double wall design, 3:1 Shrink Ratio. These butt connectors provides high tensile strength and enough hot melt adhesive inside the tubing to ensure waterproof performance.
- [Safe to use] Comply with all electrical standards. Flame retardant design ensures safety.
- [Package Included] You will get a box of 110pcs heat shrink bullet connectors. 6 types terminals in the most commonly used sizes. Including 30pcs male bullet connectors AWG 22-16 (red), 30pcs female bullet connectors AWG 22-16 (red), 20pcs male bullet connectors AWG 16-14 (blue), 20pcs female bullet connectors AWG 16-14 (blue), 5pcs male bullet connectors AWG 12-10 (yellow), 5pcs female bullet connectors AWG 12-10 (yellow).
How to crimp and check the connection
- Identify the exact terminal and wire. Confirm the part number, conductor gauge, and insulation diameter against the product documentation.
- Use compatible tooling. Select the crimping tool specified or approved for that terminal and wire range. McMaster-Carr warns that using a crimping tool helps avoid a damaged barrel and a loose connection.
- Follow the part-specific crimp instructions. Do not transfer die dimensions, crimp settings, or inspection criteria from a different terminal family. For example, Molex’s 2005 ATP tooling specification covers its Perma-Seal snap-plug terminals for 14–16 AWG and gives tooling and inspection details for that specified application; it is not a universal field guide.
- Inspect and mate the connection as directed. Use the manufacturer’s inspection criteria, then confirm that the male and female parts are the intended mating pair and seat as designed. If the crimp or fit is uncertain, do not treat the connection as ready for service.
What to compare before buying
| Check | What to verify |
|---|---|
| Wire compatibility | Supported conductor gauge and insulation outside diameter for the specific part |
| Mating fit | Male or female configuration, plug diameter, and matching connector family |
| Construction | Terminal metal, insulation material, and any environmental protection claimed for the part |
| Crimping | Single- or double-crimp construction where specified, plus approved tooling and instructions |
| Electrical suitability | Published ratings and conditions for the intended circuit, checked against equipment instructions |
Common selection mistakes
- Choosing by the name alone: “Bullet” does not guarantee a matching diameter or compatible connector family.
- Checking gauge but not insulation: A conductor may fall within a stated wire range while its insulation diameter does not suit the terminal.
- Assuming category ranges apply to every part: Confirm the specific SKU’s product data rather than treating a family-wide range as a per-part guarantee.
- Using an unverified crimper or procedure: Tooling guidance for one terminal and wire range does not establish a correct crimp for another.
- Assuming a universal rating: Select from the specific part’s published electrical and environmental ratings, not from the connector style alone.
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