---
product_id: 10569101
title: "Replacement Tenant Mail Box Lock for 1570 \"F\" Series CBU & 4C Mail Units by AF Florence"
brand: "21st century building specialties"
price: "$70.85"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/10569101-replacement-tenant-mail-box-lock-for-1570-f-series-cbu
store_origin: US
region: United States of America
---

# Compact fit for 1570 'F' Series & 4C units USPS-approved secure lock Precision metal craftsmanship Replacement Tenant Mail Box Lock for 1570 "F" Series CBU & 4C Mail Units by AF Florence

**Brand:** 21st century building specialties
**Price:** $70.85
**Availability:** ✅ In Stock

## Summary

> 🔒 Upgrade your mailbox game with the lock that means business!

## Quick Answers

- **What is this?** Replacement Tenant Mail Box Lock for 1570 "F" Series CBU & 4C Mail Units by AF Florence by 21st century building specialties
- **How much does it cost?** $70.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/10569101-replacement-tenant-mail-box-lock-for-1570-f-series-cbu)

## Best For

- 21st century building specialties enthusiasts

## Why This Product

- Trusted 21st century building specialties brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lightweight & Compact:** Weighs just 0.01 ounces with sleek dimensions, perfect for discreet mailbox upgrades.
- • **Effortless Replacement:** Single-piece design makes swapping your old lock quick and hassle-free—stay ahead in mailbox security.
- • **USPS-Approved Security:** Factory-standard lock trusted by postal services for ultimate mailbox protection.
- • **Precision Engineered Fit:** Designed specifically for 1570 'F' Series and 4C mail units ensuring seamless installation.
- • **Durable Metal Construction:** Crafted from high-quality metal for long-lasting strength and modern aesthetic appeal.

## Overview

This USPS-approved replacement tenant mailbox lock by AF Florence is precision-engineered for 1570 'F' Series and 4C mail units. Crafted from durable metal with a modern finish, it offers a lightweight, compact, and secure solution trusted by postal services and designed for effortless installation and long-term reliability.

## Description

Replacement Tenant Mail Box Lock for 1570 "F" Series CBU & 4C Mail Units by AF Florence

## Features

- This lock is USPS approved and is used by the factory on new units
- Note: Mail unit brand (e;g;, "AF Florence"") is usually noted on nameplate attached to mail unit
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions
- Note: Mail unit brand (e;g;, "AF Florence"") is usually noted on nameplate attached to mail unit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | 21st Century Building Specialties |
| Part Number | FBA_L-100 |
| Item Weight | 0.01 ounces |
| Package Dimensions | 3.11 x 2.76 x 0.98 inches |
| Item model number | CECOMINOD032391 |
| Is Discontinued By Manufacturer | No |
| Color | Silver, Gold |
| Style | Modern |
| Material | metal |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Replacement Tenant Mail Box Lock for 1570 "F" Series CBU & 4C Mail Units by AF Florence - Image 1](https://m.media-amazon.com/images/I/71G7kb5k0uL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect replacement for  Salsbury Industries 3390 Standard Replacement Lock for F Series CBU door
*by T***J on June 11, 2025*

Perfect replacement for Salsbury Industries 3390 Standard Replacement Lock for F Series Cluster Box Unit Door with Three Keys. I did have to use the leaver/latch from the old lock, but everything fit and worked perfectly.,... a 5 minute replacement.

### ⭐⭐⭐⭐⭐ Excellent product, 100% recommended!!
*by A***M on June 2, 2025*

Excellent product, 100% recommended!!

### ⭐⭐⭐⭐⭐ Exact replacement
*by S***K on February 19, 2025*

Perfect fit!

---

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**Shop now:** [https://www.desertcart.us/products/10569101-replacement-tenant-mail-box-lock-for-1570-f-series-cbu](https://www.desertcart.us/products/10569101-replacement-tenant-mail-box-lock-for-1570-f-series-cbu)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-18*