2-1/2 in Hex Head Screw with Sealing Washer
2-1/2 in Hex Head Screw with Sealing Washer
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2-1/2 in Length | 5/16 in Hex Drive | Sealing Washer | Self-Drilling Point | 250-Piece Box
2-1/2 in Hex Head Screw with Sealing Washer
Fasten gutters, trim, metal panels, and exterior parts with a longer hex washer head screw designed to bite, seal, and stay controlled under a driver instead of turning the job into stripped-head therapy.
The Wrong Exterior Screw Can Create Leaks, Loose Parts, and Rust Streaks
| Installation Problem | Jobsite Consequence | Product Advantage |
|---|---|---|
| Short or weak fasteners | Loose gutter parts, poor bite, and callbacks when the connection starts moving | 2-1/2 in length gives more reach for compatible gutter, trim, fascia, and exterior fastening work. |
| Unsealed screw holes | Water intrusion, staining, corrosion, and damaged substrates | Integrated sealing washer helps compress around the fastener head when installed correctly. |
| Driver slip and stripped heads | Wasted fasteners, ugly finish, slower installs, and more frustration | 5/16 in hex head gives the driver more positive engagement than weaker drive styles. |
| Rust-prone exterior fastening | Visible rust streaks, weakened connections, and poor long-term appearance | Ceramic silver finish is positioned for exterior corrosion resistance in moisture-exposed applications. |
Why Installers Keep This Screw in the Fastener Bin
Longer Reach for Exterior Fastening
The 2-1/2 in length helps with compatible gutter, fascia, trim, metal panel, and exterior fastening applications where extra reach matters.
Hex Head Control
The 5/16 in hex head gives installers better driver engagement for controlled fastening with a drill or impact driver.
Washer-Assisted Sealing
The sealing washer helps reduce water entry around the screw head when the screw is installed straight and not overdriven.
Contractor Box Quantity
The 250-piece box supports install crews, repair trucks, shop stock, and repeat gutter fastening jobs without buying one tiny pack at a time.
Product Snapshot
| Product Detail | Specification | Why It Matters |
|---|---|---|
| Product Type | Hex head screw with sealing washer | Fastens exterior gutter and metal components while helping seal the screw point when installed correctly. |
| Length | 2-1/2 in | Useful where a longer fastener is needed for compatible fascia, trim, roofing, or exterior assembly work. |
| Drive | 5/16 in hex head | Provides strong driver engagement for controlled installation. |
| Washer | Integrated sealing washer | Helps protect the fastener hole from moisture when properly compressed. |
| Recommended Use Cases | Gutter fastening, metal roofing, trim, exterior repair, and compatible sheet metal work | Useful for installers, repair crews, maintenance teams, and contractors working with exterior water-management components. |
Product Details
| Product Detail | Specification | Installer Benefit |
|---|---|---|
| Fastener Style | Hex washer head screw | Helps installers drive the screw with firm engagement and better control. |
| Length | 2-1/2 in | Adds reach for compatible fastening through exterior parts into suitable backing material. |
| Drive Size | 5/16 in hex | Pairs with common hex driver bits used by gutter, roofing, and exterior crews. |
| Washer Type | Integrated sealing washer | Helps seal the fastener point when the washer is compressed correctly. |
| Finish | Ceramic silver | Provides an exterior-focused finish for moisture-exposed fastening applications. |
| Point Type | Self-drilling point | Can reduce prep time in compatible materials when drill speed, pressure, and substrate are appropriate. |
| Material | Hardened steel | Supports exterior fastening work when used within the screw’s intended application range. |
| Box Quantity | 250 pieces | Useful for crews, repeat installs, repair trucks, and jobsite stock. |
Gutter Installation Applications
| Application | Why It Matters | Pre-Install Check |
|---|---|---|
| Gutter fastening to suitable backing | Helps secure compatible gutter components where a longer exterior fastener is needed. | Confirm substrate, screw length, edge distance, washer compression, and load requirements. |
| Metal roofing and panel fastening | Sealing washer helps protect penetrations in compatible metal panel work. | Confirm panel profile, drill point suitability, washer seat, and correct torque setting. |
| Exterior trim and flashing work | Useful where fastener length and washer coverage are needed for exterior assemblies. | Confirm material thickness, finish compatibility, and whether pre-drilling is needed. |
| Repair and service calls | Helps replace missing, loose, corroded, or poorly seated exterior fasteners. | Inspect the old hole and backing material before upsizing or refastening. |
| Contractor stock and install trucks | 250-piece box supports repeat fastening jobs without constant small-pack purchasing. | Store dry, keep washers clean, and avoid mixing fastener types in the same bin. |
How the Screw Works
| Step | What Happens | Why It Matters |
|---|---|---|
| 1. Position | The screw is placed at the planned fastening point. | Correct placement helps avoid edge blowout, misalignment, or poor washer seating. |
| 2. Drive | The 5/16 in hex head is driven with a compatible bit. | Positive bit engagement helps reduce driver slip and stripped heads. |
| 3. Seat Washer | The washer compresses against the surface as the screw seats. | Proper compression helps seal the fastener point; overdriving can damage the washer. |
| 4. Inspect | The installer checks the screw head, washer, substrate, and alignment. | A quick inspection helps catch tilted screws, crushed washers, and loose fastening before the job is finished. |
Choose the Right Fastener Setup
This Product: 2-1/2 in Hex Head Screw with Washer
Best for compatible exterior fastening where longer reach, hex drive control, and washer-assisted sealing are needed.
Shorter Gutter Screws
Better for lighter-duty or shorter-penetration work where 2-1/2 in length is not needed.
Rivets
Better for one-side sheet-metal fastening where a permanent blind fastener is preferred over a screw.
Key Benefits
| Benefit | Plain-English Value |
|---|---|
| 2-1/2 in length | Provides longer fastening reach for compatible exterior assemblies. |
| 5/16 in hex head | Improves driver engagement and installation control. |
| Integrated sealing washer | Helps reduce moisture entry at the fastener point when installed correctly. |
| Ceramic silver finish | Supports exterior use where corrosion resistance matters. |
| Self-drilling point | Can reduce prep time in compatible materials. |
| Hardened steel | Provides a strong fastener body for intended exterior fastening work. |
| 250-piece box | Better suited for contractor stock, install trucks, and repeat jobs. |
| Gutter and roofing use | Useful for compatible gutter, trim, metal roofing, and exterior fastening applications. |
| Washer visibility | Makes it easier to inspect washer seating during installation. |
| Repair-ready fastener | Good for replacing loose, rusted, missing, or poorly seated exterior screws when the size is correct. |
Product Specifications
| Specification | Details |
|---|---|
| Product Name | 2-1/2 in Hex Head Screw with Sealing Washer |
| Product Type | Hex washer head screw / exterior fastener / gutter screw / roofing screw |
| Length | 2-1/2 in |
| Head Type | Hex head |
| Drive Size | 5/16 in hex |
| Washer | Integrated sealing washer |
| Finish | Ceramic silver |
| Corrosion Test Reference | 1000-hour salt spray rating |
| Point Type | Self-drilling point |
| Material | Hardened steel |
| Box Quantity | 250 pieces |
| Primary Gutter Uses | Gutter fastening, fascia fastening, trim fastening, exterior repair, metal roofing, and compatible sheet metal work |
| Common Accessories | 5/16 in hex driver bit, drill or impact driver, PPE, sealant if required by the assembly, and compatible backing material |
| Confirm Before Use | Substrate, material thickness, fastener length, drill point suitability, washer compression, corrosion compatibility, and torque setting |
| Not Intended For | Unsupported structural loads, incompatible metals, overdriven washer applications, or substrates where the screw cannot properly bite |
| Expected Service Life | Varies by environment, installation quality, washer condition, material compatibility, exposure, and maintenance. |
Who Uses This Hex Head Screw?
Gutter Installers
For compatible gutter fastening, fascia attachment, trim work, and exterior fastening where a sealing washer and longer screw are needed.
Repair and Service Crews
For replacing missing, loose, corroded, stripped, or poorly seated screws on gutters, trim, panels, and exterior assemblies.
Roofing, Sheet Metal, and Maintenance Teams
For compatible metal roofing, sheet metal, trim, and exterior work where washer sealing and corrosion resistance matter.
Setup and Installation Guide
| Step | Action | Why It Matters |
|---|---|---|
| 1 | Confirm the screw length is correct for the assembly. | A fastener that is too short may not hold; a fastener that is too long may interfere behind the material. |
| 2 | Confirm substrate and material compatibility. | The screw must be able to bite into suitable backing without damaging the assembly. |
| 3 | Use a clean 5/16 in hex driver bit. | A worn bit can round the head or slip during installation. |
| 4 | Align the screw straight to the work surface. | A crooked screw can distort the washer and weaken the seal. |
| 5 | Drive at a controlled speed. | Controlled driving helps prevent overheating, stripping, and washer damage. |
| 6 | Seat the washer evenly. | The washer should compress enough to seal without being crushed or split. |
| 7 | Avoid overdriving. | Overdriving can deform the washer and reduce sealing performance. |
| 8 | Inspect the fastener head and washer. | Inspection catches tilted screws, crushed washers, or poor seating early. |
| 9 | Check for movement in the fastened part. | Loose movement can lead to noise, leaks, and callbacks. |
| 10 | Repeat with consistent spacing and torque. | Consistent fastening improves appearance, holding performance, and water resistance across the installation. |
Pro Tip
The washer is only as good as the installation. Drive the screw straight, stop when the washer is properly compressed, and avoid crushing it. A clean washer seat helps protect the hole; an overdriven washer is just a leak invitation wearing a tiny hat.
Frequently Asked Questions
| Question | Answer |
|---|---|
| What is this 2-1/2 in hex head screw used for? | It is used for compatible gutter fastening, metal roofing, trim, exterior repairs, and sheet metal work where a hex head screw with a sealing washer is appropriate. |
| What size driver does it use? | This screw uses a 5/16 in hex driver. Use a clean, properly fitting bit to reduce slipping and head damage. |
| Does the washer make the screw waterproof? | The sealing washer helps reduce water entry around the fastener when installed correctly, but performance depends on washer compression, surface condition, substrate, slope, exposure, and installation quality. |
| Does the self-drilling point work in every material? | No. Self-drilling performance depends on the material, thickness, drill speed, pressure, and backing. Harder or thicker materials may require a pilot hole or a different fastener. |
| What does the 1000-hour salt spray rating mean? | It refers to corrosion-resistance testing for the finish. It is not a lifetime guarantee and does not replace proper material selection, installation, and maintenance. |
| What is GutterAll's return policy for this product? | GutterAll offers a 30-day return window for unused standard products in original condition. Opened, installed, damaged, mixed, corroded, customer-damaged, special-order, or incorrectly selected fasteners may not be returnable unless defective. Confirm size, material, washer type, and quantity before ordering. |
| What fulfillment options are available? | This fastener box can ship when available through Shopify checkout. Local pickup and local delivery may also be available through GutterAll in Damascus, Oregon. Confirm current fulfillment options at checkout. |
Fastening and Safety Notice
Installing exterior screws may involve sharp metal edges, overhead work, ladders, drill torque, flying chips, and pinch points. Use eye protection, gloves, ladder safety, and appropriate jobsite PPE.
Confirm the screw length, substrate, washer compression, material compatibility, drill speed, and torque setting before installation. Overdriving can damage the washer and reduce sealing performance.
Do not use this fastener for unsupported structural loads, incompatible metals, or applications where a different fastener type is required by the assembly, manufacturer, engineer, or code requirement.
Need Help Matching the Screw to the Job?
The right screw depends on substrate, screw length, washer type, coating, material thickness, drill point, driver bit, and exposure. Website chat is the fastest way to confirm fit before checkout.
Fastest Path
Start with website chat for screw length, driver size, washer fit, substrate compatibility, pickup, local delivery, or shipping questions.
Complete the Setup
Pair with a clean 5/16 in hex driver bit, drill or impact driver, PPE, matching gutter parts, and compatible backing material.
Avoid Fit Mistakes
Do not overdrive the washer, use the wrong driver bit, or assume one screw fits every substrate and exposure condition.
Product Summary Box
The 2-1/2 in Hex Head Screw with Sealing Washer is an exterior fastener for compatible gutter fastening, metal roofing, trim, sheet metal, and repair work. It combines a 2-1/2 in length, 5/16 in hex drive, self-drilling point, hardened steel body, ceramic silver finish, and integrated sealing washer in a 250-piece box. Confirm substrate, length, washer compression, material compatibility, drill speed, and torque before installation.
Address
GutterAll
19759 SE Sunnyside Rd
Damascus, OR 97089
Hours
Mon-Fri: 7am-4pm PST
Sat: 9am-12pm PST
sales@gutterall.com
Phone
(503) 850-6784
