United States: Free shipping on orders over $49
Milktooth
SwitchesKeycapsKeyboardsAccessories
Milktooth
Wishlist
Cart

Links

  • Switches
  • Keycaps
  • Keyboards
  • Accessories
  • Collections
  • Learn
  • Suggest us products
  • Contact us
  • Help and FAQ
  • About us

Contact us

Need a hand?

E-mail us.

Social

  • YouTube
  • Instagram
  • Discord

Newsletter

Sign up for the latest news, personalized reminders, and exclusive offers.

© 2026
  • Terms
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch
HMX FJ400 Linear Switch

HMX

FJ400 Linear Switch

DescriptionThe FJ400 is the middle ground in the HMX Film switch lineup, offering a balanced sound profile.
Descriptors
clacky, high-pitched, polished
Technical data

Type: Linear

Actuation force: 50g

Bottom out force: 58g

Total travel: 3.8mm

Mount type: PCB (5-pin)

Top housing material: POM

Bottom housing material: Nylon

Factory lubed

$3.29 USD

$3.50 USD

6% off

10 switches per order

HMX Switches

Shop all
Bruise

HMX Bruise

Tactile

$4.20 per 10

Bleed

HMX Bleed

Tactile

$4.20 per 10

Retro J

HMX Retro J

Tactile

$4.20 per 10

Blue Star

HMX Blue Star

Tactile

$4.99 per 10

Sandstorm

HMX Sandstorm

Tactile

$4.20 per 10

Cheese

HMX Cheese

Linear

$5.50

$3.99 per 10

Sonja

HMX Sonja

Linear

$3.50 per 10

Xinhai

HMX Xinhai

Linear

$3.50 per 10

Swift

HMX Swift

Linear

$3.50

$2.99 per 10

Xinhai (Heavy)

HMX Xinhai (Heavy)

Linear

$3.50 per 10

Macchiato

HMX Macchiato

Linear

$3.50

$2.99 per 10

Silent Sakura - 53g

HMX Silent Sakura - 53g

Linear

$3.50 per 10

Gravel

HMX Gravel

Linear

$3.50

$2.99 per 10

Yamatake

HMX Yamatake

Tactile

$4.20 per 10

Lotus

HMX Lotus

Linear

$3.49

$2.99 per 10

You may also like

Stellar Rose

Akko Stellar Rose

Linear

$3.89

$3.10 per 10

Poro

HMX Poro

Linear

$3.50

$2.99 per 10

Orange

Jerrzi Orange

Linear

$2.79

$2.30 per 10

G-ONE

Wingtree G-ONE

Linear

$3.50 per 10

Silent Frozen (V2)

TTC Silent Frozen (V2)

Linear

$8.61

$5.55 per 10

WS Silent Linear

Wuque Studio WS Silent Linear

Linear

$4.20 per 10

WS Gold Arowana

Wuque Studio WS Gold Arowana

Linear

$3.99 per 10

Nixie

Cherry Nixie

Linear

$6.00

$4.19 per 10

LT

Gazzew LT

Linear

$6.50 per 10

WS Yellow

Wuque Studio WS Yellow

Linear

$3.50 per 10

EF Dopamine

Wuque Studio EF Dopamine

Linear

$3.30 per 10

Lupine

Durock Lupine

Linear

$5.50

$4.25 per 10

Baby Raccoon (V2)

Gateron Baby Raccoon (V2)

Linear

$5.50 per 10

Sonja HC

HMX Sonja HC

Linear

$3.50 per 10

Yogurt

HMX Yogurt

Linear

$3.50

$3.29 per 10

Shop Keyboards

Shop all
Sandgold Evo80 - Azure/FR4

Evoworks Sandgold Evo80 - Azure/FR4

$169.99

Nut65 Cu Wireless 65% Barebones - Sandgold

Weikav Nut65 Cu Wireless 65% Barebones - Sandgold

$179

$165.99

Basalt Gray Evo75 - Amber/FR4

Evoworks Basalt Gray Evo75 - Amber/FR4

$169.99

White Air75 V3 - Blush nano

NuPhy White Air75 V3 - Blush nano

$138.95

Silver Flow 2 100 - Void silent linear

Lofree Silver Flow 2 100 - Void silent linear

$179

DP104 Full-Size Keyboard - Mecha Grey

Ticktype DP104 Full-Size Keyboard - Mecha Grey

$199

Spark Evo80 - Oat/PP

Evoworks Spark Evo80 - Oat/PP

$169.99

Evo80 Aluminum TKL Hotswap Wireless Keyboard - Baby Pink

Evoworks Evo80 Aluminum TKL Hotswap Wireless Keyboard - Baby Pink

$169.99

Nova White Evo75 - Amber/FR4

Evoworks Nova White Evo75 - Amber/FR4

$169.99

Pink Node75 HP - Brown max

NuPhy Pink Node75 HP - Brown max

$99.95

$89.95

Rainy75 Pro - Yellow

WOBKEY Rainy75 Pro - Yellow

$159.99

Rainy75 Standard - Blue

WOBKEY Rainy75 Standard - Blue

$139.99

Pink Node75 LP - Brown nano

NuPhy Pink Node75 LP - Brown nano

$99.95

$89.95

Nut65 Wireless 65% Barebones - Milk White

Weikav Nut65 Wireless 65% Barebones - Milk White

$99.99

$89.99

Crush80 Reboot Pro - Black

WOBKEY Crush80 Reboot Pro - Black

$169.99

Shop Keycaps

Shop all
NuPhy DOT Matrix Nebula Dark Keycaps - WoB

NuPhy NuPhy DOT Matrix Nebula Dark Keycaps - WoB

$49

Pink Duckey Keycap

Duckeys Pink Duckey Keycap

$11.99

WS PBT Creamy Charcoal

Wuque Studio WS PBT Creamy Charcoal

$79

R.W.B.

Keykobo R.W.B.

$94

R1 Red Accent (R6)

Hammerworks R1 Red Accent (R6)

$20

iRetro All-in-One

LKS iRetro All-in-One

$75

$65

Taro Balls

Qwertykeys Taro Balls

$70

Arabic Blue

JC Studio Arabic Blue

$39

Purple Duckey Keycap

Duckeys Purple Duckey Keycap

$11.99

Arabic Orange

JC Studio Arabic Orange

$39

Alphas Arabic Blue (R6)

Hammerworks Alphas Arabic Blue (R6)

$46

Cherry Color 1953

JC Studio Cherry Color 1953

$39

Greek Red

JC Studio Greek Red

$39

Arabic Purple

JC Studio Arabic Purple

$39

Alphas Korean Red (R6)

Hammerworks Alphas Korean Red (R6)

$42

Shop Accessories

Shop all
Plate Mount Stabilizers

TTC Plate Mount Stabilizers

$18

Plate Mount Stabilizers (Long Travel)

TTC Plate Mount Stabilizers (Long Travel)

$18

Iridescent Switch Puller

Mielke Iridescent Switch Puller

$15

Clear V2 Screw-in Stabilizer Set

Everglide Clear V2 Screw-in Stabilizer Set

$25

$15

Clear V2 Plate Mount Stabilizer Set

Everglide Clear V2 Plate Mount Stabilizer Set

$25

$15

V3 Smokey Black Screw-in Stabilizer Set (4×2u, 1×6.25u)

Durock V3 Smokey Black Screw-in Stabilizer Set (4×2u, 1×6.25u)

$19

$15

Keycap Puller

Mielke Keycap Puller

$5

Black V2 Plate Mount Stabilizer Set

Everglide Black V2 Plate Mount Stabilizer Set

$25

$15

TypePlus x YiKB Full Size (100%) Stabilizers

Typeplus TypePlus x YiKB Full Size (100%) Stabilizers

$19

Staebies V2.2 Black Screw-in Stabilizer Set

AEBoards Staebies V2.2 Black Screw-in Stabilizer Set

$22

$20

Black V2 Screw-in Stabilizer Set

Everglide Black V2 Screw-in Stabilizer Set

$25

$15

V3 Smokey Black Screw-in Stabilizer Set (4×2u, 1×7u)

Durock V3 Smokey Black Screw-in Stabilizer Set (4×2u, 1×7u)

$19

$15

United States: FREE Shipping on orders over $49 USD. See shipping & returns