RJ plugs and covers

RJ plugs are a type of plugs used in telecommunications for many years. In the beginning, they were used in telephones to connect them, and they were one or two pairs. With the creation of LAN networks based on twisted pair , an RJ45 connector was designed to enable a total of four-pair cables. At the moment, it is the most popular RJ type connector. RJ45 plugs can be used both for terminating a stranded twisted pair (each wire consists of many very thin conductors) mainly used in patchcords and wire type. The plugs for these applications differ in the way the contact terminates that connects to the conductor.

Rj45 connectors can come in many types of grades:

  • RJ45 UTP cat.5e plug
  • plug RJ45 FTP / STP cat.5e
  • RJ45 UTP cat 6 plug
  • plug RJ45 FTP / STP cat. 6
  • RJ45 UTP cat 6A plug
  • plug RJ45 FTP / STP cat. 6A
  • RJ45 UTP cat 7 plug
  • plug RJ45 FTP / STP cat. 7

RJ45 plugs - types and application

To properly terminate the cable and protect it from damage, the RJ45 plug must be fitted with a cover. Factory-made cables (the so-called patchcords) are covered with special injection molding machines. Separately mounted covers must be used for hand-mounted plugs.

There are 2 types of casings:

  • external, snap-on covers for RJ plug . After installation, it is wider and in some devices there may be a problem with connecting multiple plugs side by side,
  • internal, equipped with special handles that lock into it when tightened. The cover has the same width as the plug and when fitted, the complete plug has the same width as the RJ45 plug itself.


Comparision table RJ plugs and covers

Image Product name Price (PLN) Category / Class Type Type of cable Color Height [mm] Width [mm]
plug RJ45 8p8c UTP stranded, cat. 5e (100 pcs) 29.99 5e / D UTP cord transparent, transparent 14 11.5
Plug RJ45 8p8c UTP stranded, cat. 5e (100 pcs), MIX color 28.99 5e / D UTP cord mix of colors, transparent, transparent 14 11.5
plug RJ45 8p8c UTP wire, cat. 5e (100 pcs) 24.33 5e / D UTP wire transparent, transparent 14 11.5
plug RJ45 8p8c UTP wire, cat. 5e (100 pcs), MIX color 29.99 5e / D UTP wire mix of colors, transparent, transparent 14 11.5
plug RJ45 8p8c FTP cable, cat. 5e (100 pcs) 64.16 5e / D FTP / STP transparent, transparent, silver 14 11.5
plug RJ45 8p8c FTP cable, cat. 6 (100pcs) 89.99 6 / E FTP / STP cord transparent, transparent, silver 14 11.5
RJ45 plug 8p8c FTP cable, cat. 5e (100 pcs), red 57.99 5e / D FTP / STP cord transparent, transparent, silver, red 14 11.5
plug RJ45 8p8c UTP stranded, cat. 6 (100pcs) 39.99 6 / E UTP cord transparent, transparent 14 11.5
RJ12 telephone plug 6p6c (100pcs) 14.99 cord transparent, transparent 11 9.5
RJ9/RJ10 telephone plug 4p4c (100 pcs) 15.99 cord transparent, transparent 11 7.6
RJ12 telephone plug 6p6c wire (100pcs) 17.63 wire transparent, transparent 11 9.5
RJ9/RJ10 telephone plug 4p4c wire (100 pieces) 17.69 wire transparent, transparent 11 7.6
cover for RJ45 plug 8p gray (100 pcs) 19.99 Universal Universal gray 14 14.5
cover for RJ45 plug 8p blue (100 pcs) 15.99 Universal Universal blue 14 14.5
cover for RJ45 plug 8p green (100 pcs) 15.99 Universal Universal green 14 14.5
cover for RJ45 plug 8p red (100 pcs) 15.99 Universal Universal red 14 14.5
cover for RJ45 plug 8p black (100 pcs) 14.99 Universal Universal black 14 14.5
cover for RJ45 plug 8p yellow (100 pcs) 15.99 Universal Universal yellow 14 14.5
cover for RJ45 plug 8p assorted colors (100 pcs) 15.99 Universal Universal mix of colors 14 14.5
Cap for RJ45 Cat.5e UTP Plug, 12mm Width, Insertable (100 pcs) 54.99 5e / D UTP transparent, transparent 17.4 12.8
Cap for RJ45 Cat.5e FTP Plug, 12mm Width, Insertable (100 pcs) 64.99 5e / D FTP / STP transparent, transparent 16.6 12.8
RJ45 Cat.6 UTP Plug Protector, 12mm Width, Insertable (100 pcs) 64.99 6 / E UTP transparent, transparent 15.6 12.5
cover for RJ45 plug cat. 6 FTP, width - 12mm, (100 pcs) 64.99 6 / E FTP / STP transparent, transparent 15.6 12.5
plug RJ45 8p8c UTP stranded, cat. 5e (10 pcs) 5.06 5e / D UTP cord transparent, transparent 14 11.5
plug RJ45 8p8c UTP wire, cat. 5e (10 pcs) 4.87 5e / D UTP wire transparent, transparent 14 11.5
plug RJ45 8p8c FTP cable, cat. 5e (10 pcs) 12.83 5e / D FTP / STP cord transparent, transparent, silver 14 11.5
plug RJ45 8p8c FTP cable, cat. 6 (10pcs) 17.99 6 / E FTP / STP cord transparent, transparent, silver 14 11.5
RJ45 plug 8p8c FTP cable, cat. 5e (10 pcs), red 9.99 5e / D FTP / STP cord transparent, transparent, silver, red 14 11.5
plug RJ45 8p8c UTP stranded, cat. 6 (10pcs) 8.00 6 / E UTP cord transparent, transparent 14 11.5
RJ12 telephone plug 6p6c (10pcs) 2.99 cord transparent, transparent 11 9.5
RJ9/RJ10 telephone plug 4p4c (10 pcs) 3.28 cord transparent, transparent 11 7.6
RJ9/RJ10 Telephone Plug 4p4c (10 Pieces) 3.54 wire transparent, transparent 11 7.6
cover for RJ45 plug 8p gray (10 pcs) 2.99 Universal Universal gray 14 14.5
Plug Cover RJ45 8p Blue (10 Pcs) 2.99 Universal Universal blue 14 14.5
plug cover RJ45 8p green (10 pcs) 2.99 Universal Universal green 14 14.5
cover for RJ45 plug 8p red (10 pcs) 2.99 Universal Universal red 14 14.5
plug cover RJ45 8p black (10 pcs) 2.99 Universal Universal black 14 14.5
cover for RJ45 plug 8p yellow (10 pcs) 2.99 Universal Universal yellow 14 14.5
RJ45 plug cover cat.5e UTP, width 12mm, insertable (10 pcs) 10.98 5e / D UTP transparent, transparent 17.4 12.8
RJ45 Cat.5e FTP Plug Protector, 12mm Width, Insertable (10 pcs) 12.99 5e / D FTP / STP transparent, transparent 16.6 12.8
RJ45 Cat.6 UTP Plug Protector, 12mm Width, Insertable (10 pcs) 12.99 6 / E UTP transparent, transparent 15.6 12.5
RJ45 Cat.6 FTP Plug Protector, 12mm Width, Insertable (10 pcs) 12.99 6 / E FTP / STP transparent, transparent 15.6 12.5
plug RJ45 8p8c UTP stranded, cat. 5e (50 pcs) 15.15 5e / D UTP cord transparent, transparent 14 11.5
plug RJ45 8p8c UTP Wire, Cat. 5e (50 pcs) 14.99 5e / D UTP wire transparent, transparent 14 11.5
plug RJ45 8p8c FTP cable, cat. 5e (50 pcs) 38.50 5e / D FTP / STP cord transparent, transparent, silver 14 11.5
plug RJ45 8p8c FTP cable, cat. 6 (50pcs) 53.99 6 / E FTP / STP cord transparent, transparent, silver 14 11.5
RJ45 plug 8p8c FTP cable, cat. 5e (50 pcs), red 34.99 5e / D FTP / STP cord transparent, transparent, silver, red 14 11.5
plug RJ45 8p8c UTP stranded, cat. 6 (50pcs) 24.99 6 / E UTP cord transparent, transparent 14 11.5
RJ12 telephone plug 6p6c (50pcs) 9.32 cord transparent, transparent 11 9.5
RJ9/RJ10 telephone plug 4p4c (50 pieces) 10.06 cord transparent, transparent 11 7.6
RJ9/RJ10 telephone plug 4p4c wire (50 pieces) 10.98 wire transparent, transparent 11 7.6
cover for RJ45 plug 8p gray (50 pcs) 9.99 Universal Universal gray 14 14.5
cover for RJ45 plug 8p blue (50 pcs) 9.99 Universal Universal blue 14 14.5
plug cover RJ45 8p green (50 pcs) 9.99 Universal Universal green 14 14.5
cover for RJ45 plug 8p red (50 pcs) 9.99 Universal Universal red 14 14.5
cover for RJ45 plug 8p black (50 pcs) 9.99 Universal Universal black 14 14.5
cover for RJ45 plug 8p yellow (50 pcs) 9.99 Universal Universal yellow 14 14.5
RJ45 plug cover cat.5e UTP, width 12mm, insertable (50 pcs) 34.99 5e / D UTP transparent, transparent 17.4 12.8
RJ45 Cat.5e FTP Plug Protector, 12mm Width, Insertable (50 pcs) 39.99 5e / D FTP / STP transparent, transparent 16.6 12.8
RJ45 Cat.6 UTP Plug Protector, 12mm Width, Insertable (50 pcs) 39.99 6 / E UTP transparent, transparent 15.6 12.5
RJ45 Cat.6 FTP Plug Protector, 12mm Width, Insertable (50 pcs) 39.99 6 / E FTP / STP transparent, transparent 15.6 12.5
plug RJ45 8p8c UTP stranded, cat. 5e (10 pcs), MIX color 5.81 5e / D UTP cord mix of colors, transparent, transparent 14 11.5
plug RJ45 8p8c UTP wire, cat. 5e (10 pcs), MIX color 6.42 5e / D UTP wire mix of colors, transparent, transparent 14 11.5
plug RJ45 8p8c UTP wire, cat. 5e (50 pcs), MIX color 17.84 5e / D UTP wire mix of colors, transparent, transparent 14 11.5
plug RJ45 8p8c UTP stranded, cat. 5e (50 pcs), MIX color 16.11 5e / D UTP cord mix of colors, transparent, transparent 14 11.5
plug cover RJ45 8p assorted colors (10 pcs) 1.91 Universal Universal mix of colors 14 14.5
plug cover RJ45 8p assorted colors (50 pcs) 8.41 Universal Universal mix of colors 14 14.5
plug RJ45 8p8c UTP wire, cat. 5e, pass-through (100 pcs) 27.02 5e / D UTP wire transparent, transparent 14 11.5
Wtyk RJ45 FTP STP kat. 6A, drut, , przelotowy (100 szt) 339.48 6A/D FTP STP wire transparent, transparent 14 11.5