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Keystone Series Posts, Parts and Accessories

Gaines Manufacturing offers genuine Keystone accessories and replacement parts.  


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26 products

The Keystone Beam is a brown, rectangular cast aluminum mounting bracket with a raised, slotted plate and four holes, ideal for attaching a mailbox to a deluxe post. Plain white background.The Keystone Beam is a black, rectangular cast aluminum bracket with a raised center and four corner holes, shown on a plain white background. Perfect as a mailbox mounting plate for deluxe post installations.
Keystone Beam
Keystone Series Deluxe Post Horizontal Cross Beam.  Powder coat finish.  Cast aluminum.  Includes mailbox mounting plate. Will fit all Deluxe posts......
Sale price$99.00

5 colors available
Keystone Curved Arm in premium cast aluminum, elegant textured brown finish—exemplifies lasting curb appeal and refined durability.The Keystone Curved Arm by Gaines: premium textured cast aluminum bracket, 90° bend, exudes sophistication and lasting curb appeal.
Keystone Curved Arm
Keystone Series Deluxe Post replacement Curved Arm. Powder coat finish. Cast Aluminum. Mounting hardware included. Will fit all Deluxe posts previo......
Sale price$79.00

5 colors available
The Keystone Endcap by Gaines: elegant brown 3D cast aluminum, premium textured finish—lasting curb appeal for luxury estates.The Keystone Endcap by Gaines features premium cast aluminum in an elegant beige texture, showcasing enduring luxury and design prestige.
Keystone Endcap
Keystone Series Deluxe Post End Cap replacement. Powder coat finish. Cast aluminum. Mounting hardware not included. ...
Sale price$59.00

5 colors available
The Keystone Series Door boasts a luxe powder-coated finish, arch design, and embossed approval, exuding elegance and lasting quality.The Keystone Series Door is a luxe black arched mailbox upgrade with a premium powder coat and elegant brick-patterned sides.
Keystone Series Door
Keystone Series Mailbox Door replacement. Powder coat finish. Includes mounting hardware. For use with shoulder-bolt and quarter-bolt door hinge ve......
Sale price$89.00

5 colors available
Gaines Manufacturing's Keystone Series cast aluminum post cuff boasts a luxe textured finish, blending durability with timeless elegance.Gaines’ Decorative Post Cuff: premium cast aluminum in elegant beige, adding lasting prestige and refined texture to Keystone Posts.
Decorative Post Cuff
Gaines Decorative Post Cuff  - Powder coat finish. Cast aluminum construction. Mounting hardware and instructions included. Compatible with all new......
Sale price$99.00

5 colors available
Keystone Deluxe Post Finial in rich brown cast aluminum, boasts a prestige look with superior powder coat and elegant sculpted form.Cream cast aluminum Keystone Deluxe Post Finial boasts a textured, powder-coated finish for lasting elegance and premium curb appeal.
Keystone Deluxe Post Finial
Keystone Series Deluxe Post Replacement Ball - Powder coat finish. Cast aluminum construction....
Sale price$59.00

5 colors available
Gaines' Keystone Series Address Plaque, luxe brown cast aluminum with gold 850, showcases enduring elegance and upscale hardware.The Keystone Series Address Plaque showcases 850 in gold on luxurious black cast aluminum, highlighting exceptional quality and elegance.
Keystone Series Address Plaque
Keystone Series Address Plaque  - Powder coat finish. Cast aluminum construction. Mounting hardware included. Each Address Plaque can be personaliz......
Sale price$79.00

5 colors available
Gaines Keystone Series address plaque: premium brown cast aluminum, gold 1440 numerals; elegant bracket and screw for luxury homes.Luxurious beige Keystone Series address plaque by Gaines Manufacturing, gold 1440, with premium wall bracket and hardware for lasting elegance.
Keystone Series Standard Address Plaque
Keystone Series Standard Address Plaque  - Powder coat finish. Cast aluminum construction. Mounting hardware included. Each Address Plaque can be p......
Sale price$99.00

5 colors available
Elegantly crafted black aluminum KS-LOCK Insert, rust-resistant; showcases keys—enhancing luxury mailboxes with security and style.
KS-LOCK/ Keystone Lockable Insert
Keystone Series Lockable Insert. Convert any Keystone Series Mailbox to a locking mailbox in seconds. For use ONLY with Keystone Series Mailboxes......
Sale price$99.00
The Keystone Newspaper Holder by Gaines: premium powder-coated metal, refined brown finish, designed for lasting elegance and curb appeal.Elegant black Keystone Newspaper Holder in premium metal with refined powder-coated texture, exuding durability and upscale appeal.
Keystone Newspaper Holder
Keystone Series Newspaper Holder - Powder coat finish. Aluminum construction. Compatible with all new and existing Keystone Series Deluxe, Double a......
Sale price$99.00

4 colors available
A stately, brown rectangular mailbox with a graceful curved lid and sturdy reinforced corners, exuding premium durability and elegance.Elegant cream cast aluminum Keystone Mailbox by Gaines, with arched lid and refined columns, offers enduring, upscale curb appeal.
Replacement Keystone Mailbox without Accents
Keystone Series Mailbox Replacement - Powder coat finish. Cast aluminum construction. Door accent and flag sold separately. Hardware not included. ......
Sale priceFrom $289.00

5 colors available
Luxury SPRING/Keystone Door Hardware Kit—durable metal, elegant finishes, refined for upscale mailbox repair and lasting curb appeal.Detail of a premium Keystone Spring Hardware Kit from Gaines, featuring superior metalwork for lasting elegance on a black mailbox.
SPRING / Keystone Door Hardware Kit - Spring Style
Keystone Series Mailbox Replacement Door Hardware. For use with early Keystone Series Mailbox door versions manufactured prior to 2002. Instruction......
Sale price$29.00
Gaines Manufacturing Keystone Mailbox Bolt Kit—premium metal, refined black accents; distinguished for lasting elegance and curb appeal.Detail of Gaines Manufacturing’s BOLT KIT in a refined white casing, showcasing premium metal hardware on an elegant carpeted floor.
BOLT KIT/ Keystone Door Hardware Kit - 1/4" Bolt Style
Keystone Series Mailbox Replacement Door Hardware. For use with current Keystone Series Mailbox door versions. Instructions included. Note: 1/4" Bo......
Sale price$29.00
Premium SBOLT KIT by Gaines: showcases elegant metal and black elements, engineered for lasting curb appeal and distinguished durability.A close-up of Gaines Manufacturing’s premium SBOLT KIT—sleek metal hardware and elegant black handle, exuding luxury and durability.
SBOLT KIT / Keystone Door Hardware Kit - Shoulder Bolt Style
Keystone Series Mailbox Replacement Door Hardware. For use with Keystone Series Mailbox door versions utilizing shoulder bolt attachments. Instruct......
Sale price$29.00
Premium metal spring, polished washers, and hex nut with a pristine white insert offer enduring elegance on a luxe black surface.
KS-FLAGHDW/ Keystone Flag Assembly Hardware
Keystone series replacement flag hardware. **Flag and Brass Bracket not included** ...
Sale price$15.00
Premium black magnet blocks, gold-tone L-brackets, and polished screws arranged elegantly—crafted for luxury Keystone Doors.
KS-MAGNETKIT / Replacement Magnets for Keystone Door
Replacement Magnet Kit for Keystone Series Mailboxes. Set includes two magnets, two catch plates, and attachment screws. Two-part epoxy (required) ......
Sale price$19.00
A premium brass key marked GMS in a Gaines Manufacturing Cam Lock, with a matching key, showcases elegant, durable security design.
Replacement Cam Lock
Replacement Cam Lock and Key Set. Set includes lock cylinder, attachment washer, and two keys. Fits all Gaines locking products....
Sale price$19.00
A 12oz Gaines Paint-Spray can with a premium silver finish and white cap, designed for lasting curb appeal and superior protection.
Paint-Spray 12oz Aerosol Touch-up Paint
12 oz. Aerosol Touch-Up Paint. High-quality touch-up finish in aerosol form.  Unavailable in Alaska and Hawaii ...
Sale price$19.00

5 colors available
Premium black Keystone mailbox by Gaines with gold accents, embossed details, and address—crafted for luxury estates' curb appeal.850 Park Place in bold gold serif font on white, showcasing Gaines’ premium, weather-resistant Keystone Mailbox Lettering for lasting elegance.
Keystone Mailbox Lettering
Keystone Series Mailbox replacement lettering.  Marine grade weather resilient vinyl lettering for use with Keystone Series Mailboxes. Price is per......
Sale price$29.00

3 colors available
The Keystone Flag by Gaines: a premium gold-toned metal mailbox handle, shown with mounting hardware, exuding elegance and durability.Premium textured metal L-shaped Keystone Flag handle, exuding elegance and lasting quality, with refined assembly parts below.
Keystone Flag
Keystone Series Mailbox replacement flag. For use with all Keystone Series Mailboxes. Polished Brass, Satin Nickel, Antique Bronze, and Red finish.......
Sale price$49.00

4 colors available
Elevate your Keystone mailbox with a solid brass Eagle Door Accent—distinctive raised design, timeless appeal, unmatched durability.Distinguished embossed eagle on premium bronze, symbolizing American pride and luxury for Keystone mailboxes; impeccable craftsmanship.
Eagle Door Accent
Update your Keystone Series mailbox with a new Eagle Plaque. This solid brass accent piece is available in five classic finishes: Polished Brass, A......
Sale price$69.00

5 colors available
Luxury solid brass Fleur de Lis Door Accent elevates your Keystone mailbox with prestige, lasting beauty, and timeless curb appeal.Premium textured brass plaque with raised U.S. MAIL and fleur-de-lis, enhancing Keystone mailboxes with timeless architectural elegance.
Fleur de Lis Door Accent
Update your Keystone Series mailbox with a new Fleur de Lis Plaque. This solid brass accent piece is available in five classic finishes: Polished B......
Sale price$69.00

5 colors available
Premium US Mail Signature Door Accent: gold metallic script on textured brown-gray, brass elegance for discerning mailboxes.Premium white 3D "US Mail" letters by Gaines Manufacturing showcase superior craftsmanship and upscale curb appeal on a gray carpet.
US Mail Signature Door Accent
Update your Keystone Series mailbox with a new US Mail Signature accent. This solid brass accent piece is available in five classic finishes: Polis......
Sale price$69.00

5 colors available
Sleek aluminum Keystone Deluxe Post with finial and sculpted accents, showcasing lasting elegance and premium curb appeal.The Keystone Deluxe Post by Gaines features premium materials, refined detailing, and robust hardware for unmatched style and longevity.
Keystone Deluxe Post - Includes Post, Finial, Support Beam, Curve and Endcap
Keystone Series Deluxe Post - Heavy Aluminum Construction. Textured Powder Coat Finish. Includes Post, Finial, Support Beam, Curve and Endcap. Mail......
Sale price$369.00

5 colors available
The Keystone Standard Post exudes upscale appeal with its rich dark gray, premium aluminum and refined minimalist silhouette.The Keystone Standard Post by Gaines: sleek, premium aluminum with crisp lines and elegant knob—an enduring choice for refined exteriors.
Keystone Standard Post - Post Only
Keystone Series Standard Post - Heavy Aluminum Construction. Textured  Powder Coat Finish. Mailbox sold separately. Designed for use with the Keyst......
Sale price$199.00

5 colors available
Premium brown textured aluminum post with elegant trim, dual white mailbox mounts, and nameplates—Keystone Series prestige.Elegant, textured green aluminum post with ornate finial, luxe dual white mailboxes; premium curb appeal and superior durability.
KDD - Keystone Double Deluxe Post
Keystone Series Double Deluxe Post - Heavy Aluminum Construction. Textured Powder Coat Finish. POST SET ONLY - Mailboxes and Address Plaques sold s......
Sale price$449.00

5 colors available