--- product_id: 106993472 title: "Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack" brand: "prime-line" price: "S$37" currency: SGD in_stock: false reviews_count: 5 category: "Prime Line" url: https://www.desertcart.sg/products/106993472-prime-line-s-4140-mailbox-lock-nickel-1-pack store_origin: SG region: Singapore --- # 5-pin precision locking easy install with basic tools corrosion-resistant nickel finish Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack **Brand:** prime-line **Price:** S$37 **Availability:** ❌ Out of Stock ## Summary > πŸ” Lock in your peace of mind with effortless security. ## Quick Answers - **What is this?** Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack by prime-line - **How much does it cost?** S$37 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/106993472-prime-line-s-4140-mailbox-lock-nickel-1-pack) ## 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 - β€’ **Durable Build:** Diecast and steel construction with zinc plating for long-lasting weather resistance. - β€’ **Smooth Operation:** 5-pin Hudson keyway ensures silky, reliable locking action every use. - β€’ **Secure Every Time:** Key stays locked until you remove itβ€”no more forgotten unlocked mailboxes. - β€’ **Hassle-Free Installation:** Swap your old lock in minutes with just a few simple toolsβ€”no pro needed. - β€’ **Universal Fit & Flexibility:** Multi-cam design fits a wide range of mailbox brands effortlessly. ## Overview The Prime-Line S 4140 Mailbox Lock is a nickel-plated, 5-pin diecast lock designed for versatile mailbox compatibility. Featuring a unique key retention security feature, corrosion-resistant materials, and easy installation, it offers durable, reliable protection for your mail with smooth operation and a professional finish. ## Description The Prime-Line S 4140 Diecast 5 Pin Hudson Keyway Mailbox Lock and Key Set makes it easy to secure your mail. It is designed for use with mailboxes manufactured by American Device, Auth-Florence, Bommer and Miami-Carey. 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. 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: Works good have had it for a few months now and is still going strong, very smooth operation and easy installation Review: easy to switch with old lock and adapts to a wide range of boxes .looks like it was never replaced when completed . ## Features - 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. - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000B4N0PC | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 118,869 in DIY & Tools ( See Top 100 in DIY & Tools ) 296 in Cabinet Locks | | Colour | Nickel Plated | | Customer Reviews | 4.4 4.4 out of 5 stars (4,054) | | Date First Available | 20 Sept. 2023 | | Finish | Nickel-plated,Nickel | | Included Components | 2 keys, lock and fasteners | | Item Package Quantity | 1 | | Item Weight | 97.5 g | | Item model number | S 4140 | | Manufacturer | Prime-Line Products | | Material | Diecast / Steel | | Number of Pieces | 1 | | Part Number | S 4140 | | Product Dimensions | 3.18 x 9.69 x 12.38 cm; 97.52 g | | Shape | Round | | Size | 1 Pack | | Special Features | Weather Resistant | | Style | Mailbox Lock | ## Product Details - **Brand:** Prime-Line - **Item dimensions L x W x H:** 32 x 97 x 124 millimetres - **Lock type:** Key Lock - **Material:** Diecast / Steel - **Special feature:** Weather Resistant ## Images ![Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack - Image 1](https://m.media-amazon.com/images/I/31ozYzd0+6S.jpg) ![Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack - Image 2](https://m.media-amazon.com/images/I/41I-ntBwBLS.jpg) ![Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack - Image 3](https://m.media-amazon.com/images/I/51ExKINwAtL.jpg) ![Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack - Image 4](https://m.media-amazon.com/images/I/61Ivf-HAnlS.jpg) ![Prime-Line S 4140 Mailbox Lock, Nickel, 1 Pack - Image 5](https://m.media-amazon.com/images/I/61zAeRPJhzS.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***. on 8 June 2025* Works good have had it for a few months now and is still going strong, very smooth operation and easy installation ### ⭐⭐⭐⭐⭐ Review *by B***E on 6 August 2025* easy to switch with old lock and adapts to a wide range of boxes .looks like it was never replaced when completed . ### ⭐⭐⭐⭐⭐ Review *by M***E on 11 October 2025* For an old mailbox in a condo and was easy to install, mail lady did it for me. Thanks --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/106993472-prime-line-s-4140-mailbox-lock-nickel-1-pack](https://www.desertcart.sg/products/106993472-prime-line-s-4140-mailbox-lock-nickel-1-pack) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-07-06*