Sea-Dog 299999-1 Stainless Steel Set Screw, 1/4-28 x 3/16 Inch, for Bulk Rail Fittings

The Sea-Dog 299999-1 is a stainless steel set screw sized 1/4-28 x 3/16 inch with a cone point, made for securing Sea-Dog's bulk-packed handrail fittings, rail tees, elbows, bow forms, and blend bases to boat railing tubing. Display-packed versions of these fittings already include their set screws, but bulk-packed fittings do not, so this screw is sold separately to complete the installation. It threads into the fitting body and its cone-point tip bites into the railing tube to lock the fitting in place, an alternative to pop riveting with stainless or aluminum rivets. Installation is done with a 1/8 inch Allen wrench turning the screw's hex socket drive down onto the tube surface. Built from 304-grade stainless steel, the screw resists corrosion in marine environments and matches the chrome-plated die-cast zinc fittings it is used with. At a fraction of an ounce, it is a small, inexpensive but essential hardware component for anyone installing or servicing Sea-Dog bulk rail fittings on their boat.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 299999-1
• Product Type: Set Screw
• Thread Size: 1/4-28 inch UNC
• Length: 3/16 inch
• Point Style: Cone Point
• Drive Type: Hex Socket, requires 1/8 inch Allen wrench
• Material: Stainless Steel (Grade 304)
• Finish: Stainless Steel
• Color: Silver
• Weight: 0.024 pounds
• UPC: 035514299015

Fitment

• Sea-Dog bulk-packed handrail fittings, including 60 degree end fittings, 5-1/2 degree blend bases, 90 degree tees, 90 degree elbows, and 110 degree bow forms
• Not needed for display-packed fittings, which already include their set screws

Frequently Asked Questions

What is the Sea-Dog 299999-1 set screw used for? It secures Sea-Dog bulk-packed handrail fittings, such as rail tees, elbows, bow forms, and blend bases, onto boat railing tubing so the fitting stays locked in place.

Do I need this set screw if I bought display-packed rail fittings? No. Display-packed Sea-Dog rail fittings already include their set screws; the 299999-1 is only needed to supply a set screw for bulk-packed fittings, which are sold without one.

What thread size is the Sea-Dog 299999-1 set screw? It is a 1/4-28 inch UNC thread, 3/16 inch long, with a cone point tip.

What tool do I need to install this set screw? A 1/8 inch Allen wrench is required to drive the 299999-1 set screw into the hex socket and tighten it against the railing tube.

What material is the Sea-Dog 299999-1 set screw made of? It is made from 304-grade stainless steel, giving it corrosion resistance suited to marine use.

How much does this set screw weigh? The Sea-Dog 299999-1 weighs 0.024 pounds.

Can this set screw be used instead of pop rivets on rail fittings? Yes. Sea-Dog rail fittings can be attached with set screws like the 299999-1 or by pop riveting using stainless or aluminum rivets; the set screw method uses this screw and a 1/8 inch Allen wrench instead.

Is the Sea-Dog 299999-1 sold as a single screw or in bulk? The 299999-1 part number is Sea-Dog's set screw offered for purchase separately to pair with bulk-packed fittings that ship without one.

What does 'cone point' mean for this set screw? A cone point set screw has a pointed tip that digs into the surface of the railing tube as it is tightened, helping lock the fitting from rotating or sliding.

Will this set screw fit Sea-Dog rail tees, elbows, and bow forms? Yes, the 299999-1 is the set screw used across Sea-Dog's bulk rail tee, elbow, and bow form fittings, which share the same 1/4-28 x 3/16 inch set screw specification.