We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black RJ45 inline coupler adapter, compact rectangular form, polycarbonate housing, 0.5 by 0.3 by 1.3 inches

Black Box Corporation

Black Box Corporation FM609 RJ-45 Coupler Adapter

SKU CH-H0T5-6VX6C MPN FM609

RJ-45 straight-through coupler joins two patch cables, unshielded polycarbonate housing with phosphor-bronze contacts, RoHS and WEEE certified, TAA compliant, 0.3 by 0.5 by 1.3 inches, 0.50 oz

  • CAT6 straight-through coupler joins two cables
  • Unshielded RJ-45 female-to-female design simplifies connections
  • Compact polycarbonate housing measures 1.3" depth
  • RoHS and WEEE certified for environmental compliance
  • TAA compliant with lifetime limited warranty

RJ-45 Coupler for CAT6 Cabling

This unshielded coupler joins two RJ-45 patch cables to extend a network run without re-terminating. It suits installers and technicians who need a quick, tool-free connection in structured cabling jobs. The polycarbonate housing meets RoHS and WEEE environmental standards and carries TAA compliance for government projects.

Passive Design with Zero Power Draw

The adapter contains no active electronics, so it adds no heat, no fan noise and no electrical load to the link. Phosphor-bronze contacts with nickel plating maintain signal integrity across the joint. Its compact 0.5 in height and 1.3 in depth keep the connection tidy inside panels or wall outlets.

Replaces Inline Splices or Keystone Pairs

Use this coupler instead of crimping a longer cable or mounting two keystone jacks back-to-back when a permanent join is not required. It is not for shielded installations, outdoor runs or applications that demand a sealed IP-rated connection. The jump is worth it when moves, adds and changes must stay fast and reversible.

How it compares

Measured against everything we stock in Network Adapters & RJ45 Plugs, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 60% of the 1,221 comparable items (median $19.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameBLACK BOX NETWORK SRV
Size & build
Shipping weight0.23 kg
Package size102 × 76 × 13 mm

Questions about this item

How do I install the FM609 RJ-45 coupler and what step is often missed?

Plug an RJ-45 patch cable into each female port to join two cable runs; the step often missed is confirming both cables are fully seated so the phosphor-bronze contacts latch on all eight conductors.

What maintenance or replacement will the FM609 coupler need over time?

The polycarbonate housing and nickel-plated phosphor-bronze contacts are passive; no scheduled maintenance is required, and replacement is only needed if the housing cracks or the latch tabs break from repeated insertions.

What limit appears first when the FM609 coupler is used continuously in a Cat6 link?

The unshielded design makes the coupler the first point where alien crosstalk or electromagnetic interference can degrade the Cat6 channel, especially in bundles exceeding 0.5 metre near power cables.

More in Network Adapters & RJ45 Plugs

Similar items