Mon–Fri 9:00 AM–5:00 PM CST  |  Sat 9:00 AM–3:00 PM  |  Sun Closed  |  Call or Text 815-357-3292  •  Free Shipping on Most Orders  •  Real-Time Rates When Applicable  •  Upgrade Delivery at Checkout  |  Ships Next Business Day Monday–Friday  |  We install what we sell — parts backed by real trailer service.  |  Need fitment help? Send us your trailer part photos and we will help you match it right.  |  How are we doing? Leave a review → Mon–Fri 9:00 AM–5:00 PM CST  |  Sat 9:00 AM–3:00 PM  |  Sun Closed  |  Call or Text 815-357-3292  •  Free Shipping on Most Orders  •  Real-Time Rates When Applicable  •  Upgrade Delivery at Checkout  |  Ships Next Business Day Monday–Friday  |  We install what we sell — parts backed by real trailer service.  |  Need fitment help? Send us your trailer part photos and we will help you match it right.  |  How are we doing? Leave a review →
FAMILY OWNED & OPERATED
Call / Text 815-357-3292 Text
Log in Sign up Cart (0)
Need a Trailer Part? Parts, service, fitment help.
Call 815-357-3292 Text Us

Fastway FLASH SCALE Ball Mount – 4" Drop, 2" Receiver, Built-In Scale, Dual Ball (2" & 2-5/16"), 10K GTW (48-00-8400)

$159.95
Most items ship free — select items ship for $6.39
Only 7 left
Not Sure It Fits? Ask a Pro

Fastway Flash SCALE Ball Mount: 4" Drop, Built-In Tongue Weight Scale, Dual Ball (48-00-8400)

Part Number: 48-00-8400

The FLASH SCALE gives you real-time tongue weight feedback during hookup—eliminating guesswork and helping you tow balanced, stable, and confidently without separate tools.

Balance Before You Tow

Improper tongue weight is one of the leading causes of trailer sway and braking instability. The FLASH SCALE integrates a mechanical scale directly into the mount—allowing you to verify load balance instantly, before you ever leave the driveway.

Is this the right model?

Choose the 48-00-8400 if you want built-in tongue weight visibility and your setup requires a 4" drop.

If you need more drop, move to the 6" or 8" SCALE models. If weight measurement isn’t necessary, the FLASH Secure series offers integrated locking instead.

Key Capabilities

Integrated Scale
Real-time tongue weight feedback
4" Drop / 5" Rise
Optimized for standard-height trucks
Dual Ball Setup
2" & 2-5/16" included
Aluminum Construction
Lightweight, corrosion-resistant

R&P Knowledge Hub

Target Range: 10–15% tongue weight delivers stable, predictable towing.

Too Light: Increases sway risk and reduces control.

Too Heavy: Overloads suspension and impacts braking.

Why This Matters: The built-in scale lets you correct load balance before towing—not after instability appears.

Specifications

GTW 10,000 lb
Tongue Weight 1,000 lb
Receiver 2"
Drop / Rise 4" / 5"
Material Aluminum
Part Number 48-00-8400

Explore the FASTWAY FLASH™ System

42-00-2400
4" Drop
44-00-4600
6" Drop
44-00-4400
4" Drop
44-00-4900
10" Drop
48-00-8400
4" Drop
48-00-8600
6" Drop
48-00-8800
8" Drop