4.20mm pitch, 18-position through-hole header with board lock
The 1-1586039-8: This is a TE Connectivity VAL-U-LOK header, 18 positions in two rows on a 0.165" (4.20mm) pitch.
Current rating and temperature ceiling
Rated 9A per circuit at 600VAC.

TE Connectivity AMP Connectors VAL-U-LOK, Board to Cable/Wire, Header, 18 Positions, 0.165" (4.20mm) Pitch, Through Hole, Shrouded - 4 Wall, Board Lock, Locking Ramp, Tin Contacts, 9A, 600VAC, -40°C ~ 105°C, UL94 V-2, Tray
| Parameter | Value |
|---|---|
| Series | VAL-U-LOK |
| Type | Male Pin |
| Mounting | Through Hole |
| Connector type | Header |
| Fastening type | Locking Ramp |
| Voltage rating | 600VAC |
| Current rating | 9A |
| Operating temperature | -40°C ~ 105°C |
| Contact material | Brass Alloy |
| Insulation color | Natural |
| Insulation height | 0.504\" (12.80mm) |
| Insulation material | Polyamide (PA66), Nylon 6/6 |
| Parameter | Value |
|---|---|
| Material flammability rating | UL94 V-2 |
| Style | Board to Cable/Wire |
| Package | Tray |
| Features | Board Lock |
| Shrouding | Shrouded - 4 Wall |
| Termination | Solder |
| Applications | General Purpose, Industrial, Lighting |
| Contact shape | Square |
| Rows | 2 |
| Pitch | 0.165\" (4.20mm) |
| Positions | 18 |
| Row spacing - mating | 0.165\" (4.20mm) |
| Contact finish - post | Tin |
| Contact length - post | 0.138\" (3.50mm) |
| Contact finish - mating | Tin |
| Contact finish thickness - post | 80.0µin (2.03µm) |
| Contact finish thickness - mating | 80.0µin (2.03µm) |
The 1-1586039-8: This is a TE Connectivity VAL-U-LOK header, 18 positions in two rows on a 0.165" (4.20mm) pitch.
Rated 9A per circuit at 600VAC.
The mating pitch is 0.165" (4.20mm), with the same row-to-row spacing. That's a standard VAL-U-LOK pitch, so the board footprint matches other 4.20mm headers in the series.
Through hole. The solder posts are 0.138" (3.50mm) long, tin-plated, and the board lock adds extra retention during wave solder.
It mates with a VAL-U-LOK receptacle housing (wire-to-board) that accepts the matching crimp terminals. The locking ramp on the header engages the receptacle's latch. Confirm the circuit count and keying before ordering the mating half.