--- product_id: 14203164 title: "Prime-Line S 4573 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – NA-14 Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set)" brand: "prime-line" price: "NT$505" currency: TWD in_stock: true reviews_count: 9 category: "Prime Line" url: https://www.desertcart.tw/products/14203164-prime-line-s-4573-mailbox-lock-replacement-multipurpose-mailbox-lock store_origin: TW region: Taiwan --- # 5-pin secure lock 5 interchangeable cams corrosion-resistant finish Prime-Line S 4573 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – NA-14 Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set) **Brand:** prime-line **Price:** NT$505 **Availability:** ✅ In Stock ## Summary > 🔑 Upgrade your mailbox security with style and ease! ## Quick Answers - **What is this?** Prime-Line S 4573 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – NA-14 Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set) by prime-line - **How much does it cost?** NT$505 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/14203164-prime-line-s-4573-mailbox-lock-replacement-multipurpose-mailbox-lock) ## Best For - prime-line enthusiasts ## Why This Product - Trusted prime-line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Crafted from brass, steel, and diecast materials with a nickel-plated, corrosion-resistant finish. - • **Sleek Modern Design:** Nickel finish adds a polished, professional look to your mailbox setup. - • **Smart Security Lock:** Key cannot be removed when unlocked, ensuring you never forget to lock your mailbox. - • **Universal Fit, Zero Hassle:** Works seamlessly with most mailbox brands for instant replacement. - • **Effortless DIY Installation:** Replace your mailbox lock in minutes with included cams, keys, and simple tools. ## Overview The Prime-Line S 4573 Mailbox Lock is a durable, multipurpose replacement lock featuring a 5-pin NA-14 keyway and 5 interchangeable cams. Designed for easy installation and compatibility with most mailbox brands, it boasts a corrosion-resistant nickel-plated finish and a smart locking feature that prevents key removal when unlocked, ensuring your mail stays secure every time. ## Description The Prime-Line S 4573 Diecast 5 Pin National Keyway Mailbox Lock and Key Set makes it easy to secure your mail. It is designed for use with most mailboxes. The mailbox key set comes complete with a 5 pin mailbox lock, 5 cams, and 2 keys. These multi-cam assortments eliminate the need for individual locks. The mailbox key lock set is constructed of diecast, brass, steel, and stamped steel materials. It features a spring steel locking clip and hex securing nut. The steel components come finished in a corrosion-resistant zinc-plated finish. The cylinder face comes in a nickel-plated finish. The lock is easy to install with a few simple tools. Please refer to the line art drawing for dimensions and compare with your needs before purchasing. Review: Direct fir - Lost my mailbox key and I got this one, drilled the old one out and installed this, simple and easy Review: Easy install, smooth lock! - While opening my mailbox one day, I broke the key off in the lock. The lock was old and janky anyway; I ordered one of these to replace it with. I chose this lock because the key looks the same as the key from the old lock. For lock replacement, installation was simple: simply remove the old lock, match the locking arm on the old mailbox lock to one of the five included with the set, and fasten the lock to the mailbox using the two included nuts. (A screw was alluded to in the instructions, but the actual device uses a nut instead.) It took about five minutes, including the walk to the box from my apartment and back. As compared to the old, dirty lock that this one replaced, it opens much more smoothly and reliably yet still feels very securely fastened to the door of the box. That said, I am not terribly concerned about the absolute security of this lock: if someone wanted to steal my mail, they would be much more likely to jimmy open the postal lock that opens the whole box at once. This is an easy DIY solution to a common problem that locksmiths or the post office would have charged dozens of dollars to fix. ## Features - REPLACEMENT LOCK – This multipurpose Prime-Line replacement mailbox lock is an easy fix and can easily replace lost or broken mailbox locks. Features 5 cams and an NA-14 key - WORKS FOR SEVERAL BRANDS – This replacement mailbox lock works with most brands of mailboxes. - BUILT TO LAST – The mail box lock and key set is constructed of diecast, brass, steel, and stamped steel materials; the steel components come finished in a corrosion-resistant zinc-plated finish; the cylinder face comes in a nickel-plated finish - LOCKING SECURITY FEATURE – This lock has a security feature that prevents the key from being removed when in the unlocked position, which prevents forgetting the key, and ensuring the mailbox is locked every time it’s used. - NOTE – This mailbox lock unlocks by turning the included keys in a in the counter-clockwise direction and has a retaining hex nut and retaining clip ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003OSRLDY | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #45,501 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Mailbox Locks | | Brand | PRIME-LINE | | Color | Nickel | | Control Method | Touch | | Controller Type | Hand Control | | Customer Reviews | 4.4 4.4 out of 5 stars (1,439) | | Date First Available | May 31, 2010 | | Finish | Nickel Finish,Nickel-plated | | Finish Type | Nickel Finish,Nickel-plated | | Global Trade Identification Number | 00049793245731 | | Included Components | Lock, cams and 2 keys | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 3.84 ounces | | Item dimensions L x W x H | 1.25 x 3.81 x 4.94 inches | | Item model number | S 4573 | | Lock Type | Key Lock | | Manufacturer | Prime-Line Products | | Material | Brass, Nickel | | Model Name | Mailbox Lock | | Number of Pieces | 1 | | Part Number | S 4573 | | Pattern | Lock | | Product Dimensions | 1.25 x 3.81 x 4.94 inches | | Recommended Uses For Product | Securing mailboxes | | Shape | Round | | Size | 1 Pack | | Special Feature | Key Unlock | | Special Features | Key Unlock | | Style | Modern | | UPC | 049793245731 | | Warranty Description | Warranty | ## Product Details - **Brand:** PRIME-LINE - **Item dimensions L x W x H:** 1.25 x 3.81 x 4.94 inches - **Lock Type:** Key Lock - **Material:** Brass, Nickel - **Special Feature:** Key Unlock ## Images ![Prime-Line S 4573 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – NA-14 Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set) - Image 1](https://m.media-amazon.com/images/I/51aGDpt4rOL.jpg) ## Available Options This product comes in different **Pattern** options. ## Questions & Answers **Q: Will this replace usps-l-1172c?** A: It is not an exact replace but is an alternative mailbox lock. **Q: Are there blank keys available for this lock?** A: The lock takes a National keyway blank NA-14. **Q: What is the diameter of the lock cylinder? most other cylinders are 5/8" which are too big for the mailbox hole...?** A: This item is 3/4". **Q: how many keys are included?** A: Two keys are included. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Direct fir *by A***S on November 7, 2025* Lost my mailbox key and I got this one, drilled the old one out and installed this, simple and easy ### ⭐⭐⭐⭐⭐ Easy install, smooth lock! *by A***R on September 18, 2019* While opening my mailbox one day, I broke the key off in the lock. The lock was old and janky anyway; I ordered one of these to replace it with. I chose this lock because the key looks the same as the key from the old lock. For lock replacement, installation was simple: simply remove the old lock, match the locking arm on the old mailbox lock to one of the five included with the set, and fasten the lock to the mailbox using the two included nuts. (A screw was alluded to in the instructions, but the actual device uses a nut instead.) It took about five minutes, including the walk to the box from my apartment and back. As compared to the old, dirty lock that this one replaced, it opens much more smoothly and reliably yet still feels very securely fastened to the door of the box. That said, I am not terribly concerned about the absolute security of this lock: if someone wanted to steal my mail, they would be much more likely to jimmy open the postal lock that opens the whole box at once. This is an easy DIY solution to a common problem that locksmiths or the post office would have charged dozens of dollars to fix. ### ⭐⭐⭐⭐⭐ Quick fix *by T***I on May 11, 2025* Well made ## Frequently Bought Together - Prime-Line S 4573 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – NA-14 Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set) - Prime-Line S 4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set) - Prime-Line MP4945 Mail Box Lock, 5-Cam, 5-Pin, 13/16 In. Threaded, Counter-Clockwise (Single Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tw/products/14203164-prime-line-s-4573-mailbox-lock-replacement-multipurpose-mailbox-lock](https://www.desertcart.tw/products/14203164-prime-line-s-4573-mailbox-lock-replacement-multipurpose-mailbox-lock) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-05-18*