16-Pack Socket Head Cap Screws | Grade 8 Black Zinc — Multiple Sizes

Name: 16-Pack Socket Head Cap Screws | Grade 8 Black Zinc — Multiple Sizes
Brand: Xtrusion Overland
Price: 16.0 USD
Availability: InStock

$16.00 USD

Screw Size and Length

Xtrusion Overland | SKU: HW-SHCS-100-K16

Limited Life Time Warranty

We stand behind our products. Because of this, we now offer a limited lifetime warranty against manufacturing defects, to give you peace of mind. *Check Terms and Conditions.

Third Party Lead Times

THIRD PARTY PRODUCTS

Xtrusion Overland started supplying various brands that go hand in hand with our own products, to provide a complete service and help us grow. This includes products that are drop shipped. Please be advised that availability and lead times of those product are solely impacted by the third-party vendor's schedule. Many products are sold under an open inventory method, as the technology to sync inventories is limited, therefore please reach out if a specific product is needed by a specific date for us to double check with the supplier for you!

Any potential delay that occurs in the sourcing, processing, or drop shipment at the third party level will be communicated to the best of our ability to the customer.

ESTIMATED DATE | LEAD TIMES

The estimated lead time provided when you placed your order is JUST AN ESTIMATE. It is not a guarantee that the product will be shipped on that date. The estimated lead time gives you some sense of what the current times to source, cut, pack and ship takes. Many times the lead time can be shorter, but likewise it can extend, depending on factors such as previous demand and current supply. We manufacture many components in house, but extenuating circumstances such as down time for maintenance or unscheduled downtimes for repairs might impact dates as well as delays related to our sourced components. There is a constant flow of parts and shipments, and sometimes the visibility becomes a challenge to pinpoint exactly when your product will ship.

Feel free to check on your order at any time. Be aware that our customer service team may not be able to give you an exact date for completion but rest assured we are tracking your order and it will be built in the order that it was received.

Xtrusion Overland also reserves the right to cancel items from an order, offer an alternative substitution or issue refund accordingly when product is delayed at an unacceptable time frame or at the request of the customer.

Fitment Guide

Choosing the right bed rack setup shouldn't feel like a guessing game. Because our racks are built using high-strength, military-grade T-slot aluminum extrusions, they are incredibly modular—but getting the exact fitment for your truck, tonneau cover, or tent matters. Use this authority guide to dial in your rig's specifications perfectly before you order.

1. Choose Your Height Profile

Our racks (like the popular XTR1 and XTR3 series) come in multiple height options to fit your specific storage goals. Selecting a height profile dictates your center of gravity, aerodynamic drag, and how your gear clears the truck cab.

Height Profile	Best Used For	Aero / MPG Impact
Low Profile (11"–12")	Keeping a Rooftop Tent (RTT) completely tucked below the cab roofline.	Minimal. Keeps wind resistance and drag incredibly low.
Mid Height (15"–19")	The sweet spot. Gear or RTT sits roughly flush with your cab roofline.	Moderate. Minimal impact if running side MOLLE plates.
Full / Cab Height (22"–24")	Hauling long items (kayaks, ladders, surfboards) that need to overhang the cab, or clearing soft toppers.	Higher. Adds standard wind resistance, but maximizes vertical bed volume.

2. Tonneau Cover & Soft Topper Compatibility

We pride ourselves on making our systems play nice with others, but truck bed configurations vary wildly. Here is exactly how to pair an Xtrusion Overland rack with a bed cover:

Retrax XR / T-Slot Style Covers (Fully Compatible)

How it fits: We build specific variants designed to bolt straight into the integrated T-slot tracks of Retrax XR, Pace Edwards UltraGroove, and Roll-N-Lock rail systems. No drilling or clamping to the inner bed lip—the rack slides into the cover's tracks flawlessly.

Standard Roll-Up or Fold-Up Tonneau Covers

How it fits: Standard inside-the-rail clamps or top-mount folding tonneau covers often conflict with traditional bed brackets. Please select our designated Tonneau Bracket Adapter option during configuration to allow the rack feet to clear your side rails cleanly.

SoftTopper / FasTop Enclosures

How it fits: We offer custom Soft Topper Compatible versions of the XTR1 and XTR3. These are engineered with wider, flared geometry to clear the canvas framework of a SoftTopper.

Pro Tip: If you want to be able to collapse or fold your soft topper all the way down frequently, we highly recommend selecting our Full/Tall Height (24") profile to give the folding mechanism the necessary physical clearance under the rack crossbars.

3. Weight & Load Capacity Ratings

Our aircraft-grade aluminum extrusion setups are incredibly lightweight but punch way up into heavy-duty performance territories on the trail.

Load Type	Weight Rating	Scenario Best Description
Static Capacity	Up to 1,500 lbs	When parked. Safely supports the rack, your heavy rooftop tent, multiple adults, and all packed camp gear.
Dynamic On-Road Capacity	Up to 800 lbs	While driving on paved surfaces. Handles normal highway physics, braking forces, and standard vibrations cleanly.
Dynamic Off-Road Capacity	Up to 400 lbs	While navigating rough terrain, washboards, and technical trails. Sustained high-impact forces reduce your safe threshold. Always distribute heavy gear (like fuel/water) low on the side brackets.

4. The Custom Lineup: The Streamlined XTR1 vs. The Ultimate XTR3

Every rack we build starts with our signature high-strength, lightweight 15/10-Series T-slot aluminum extrusion architecture. But how you choose to mount, configure, and access your gear determines which platform fits your build style best.

The XTR1: The Streamlined Performer

The XTR1 is our classic, open-architecture bed rack. Designed for the overlander who wants maximum strength without unnecessary weight or complexity, it offers a clean, ultra-functional aesthetic.

Maximized Bed Access: Clean 4-upright setup makes reaching over the bed rails completely unobstructed.
The Perfect RTT Foundation: Engineered to carry heavy loads while keeping the bed below free.
Lightweight & Efficient: Keeps gross vehicle weight low and center of gravity right where it belongs.

The XTR3: The Ultimate Mission Control

If your philosophy is a place for everything, and everything in its place, the XTR3 expands your mounting real estate by splitting the side profiles into four distinct, independent quadrants.

Infinite Accessory Real Estate: Run independent, adjustable side braces vertically, horizontally, or diagonally.
No-Drill Gear Walls: Mount traction boards, RotopaX, axes, shovels, and recovery gear on the outside safely.
Maximum Structural Rigidity: Additional cross-bracing handles high-speed washboards and harsh technical trails seamlessly.

5. Easy Driveway Installation Steps

We believe that building your dream rig should be as rewarding as driving it. There is no welding required and no complex fabrication. If you can use a basic socket set and an Allen wrench, you can install an Xtrusion Overland rack in an afternoon right in your driveway.

1

Assemble the Upright Hoops

Unbox your components onto a flat, clean surface. Slide the drop-in T-nuts into the main upright towers and bolt them to the heavy-duty corner gussets. Leave the fasteners finger-tight for micro-adjustments later.
2

Connect the Lateral Crossbars

Position your front and rear hoops at roughly the length of your truck bed. Slide the necessary T-nuts into the horizontal side bars (or side plates if you chose the XTR3) and connect them to the hoops to tie the structure together.
3

Prep the Vehicle Rails

If your truck has a factory utility track system, slide our specialized track nuts into the rails. If your truck has standard bed lips, position our heavy-duty clamp mounts along the bed rail spaced out evenly.
4

Lift and Align the Rack

With the help of a friend, carefully lift the fully assembled aluminum framework onto your truck bed. Guide the feet of the upright towers directly onto the bed brackets or clamps and catch the threads of the bolts.
5

Square, Level, and Final Torque

Use your tape measure to ensure the rack is perfectly centered on the truck bed and square from front to back. Once everything looks aligned, torque all fasteners down securely to specification.

6. Frequently Asked Questions

Why do you use 15 or 10-Series T-Slot Aluminum instead of welded steel?

Welded steel racks lock you into a heavy, unchangeable box the day they leave a shop. We build exclusively with heavy-duty 15/10-Series T-slot aluminum extrusions because off-roading demands both brute strength and absolute modular flexibility. Our aircraft-grade aluminum profile delivers an incredible strength-to-weight ratio that saves up to 40-50% of the weight of steel—preserving your truck's payload capacity, suspension components, and fuel mileage. Furthermore, aluminum is naturally 100% rustproof. If you scratch the powder coat on a branch, it will never turn into structural rust. The integrated T-slot channels turn your rack into an infinite grid, letting you slide, bolt, and adjust accessories anywhere as your build evolves.

Will I need to drill into my truck to install this?

For the vast majority of modern trucks (Tacoma, Tundra, Gladiator, F-150, F-250, Ram, Silverado, etc.), no drilling is required. Our racks hook directly into factory utility bed track systems or use highly secure, heavy-duty clamp mounts around the inside inner-bed lip.

How do I mount third-party accessories (RotopaX, Maxtrax, Quick Fists)?

Because our entire structure is made of standard 15/10-Series T-Slot aluminum extrusions, you aren't forced into buying proprietary parts. Simply slide any standard 5/16" or 1/4" drop-in T-nut into the channel, align your bracket, and bolt it down. It is completely universal.

Do these racks affect fuel efficiency (MPG)?

Any modification that alters your vehicle's factory aerodynamics will impact fuel efficiency slightly. However, using our Low Profile or Mid Height systems keeps your gear streamlined completely behind the cabin glass to minimize drag. Adding our custom laser-cut side MOLLE plates also helps smoothly guide side airflow over your open truck bed on high-speed routes.

Ready to Build the Ultimate Overland Rig?

Stop buying rigid setups. Step into the future of infinite customization and heavy-duty performance.

Build Your Custom Setup Now

Rack Angle Guide

Overland Rack Angle Compatibility

One Angle.
Every Build.

XTR bed racks use three rack angles — 9°, 13°, and 20° — each matched to specific vehicle setups and accessory families. Find the right angle for your build so every rail, crossbar, and mounting kit lines up perfectly.

Engineered quality

CNC billet strength

We didn't just join the strong extrusions with some sheet metal corner brackets — we put the aluminum where it makes a difference. Every angle variant uses the same 6061-T6 Aerospace grade billet, machined to precision to join all components with exact angular alignment.

✓ All three angles share the same billet standard
✓ 9°, 13°, and 20° brackets machined to exact specs
✓ No sheet metal corners — pure aerospace aluminum

CNC billet corner brackets for XTR bed racks — available in 9°, 13°, and 20° angles

Quick Reference

Angle Compatibility

Rack Angle	Product Line	Compatible Accessories
9°	Gladiator Series	All Gladiator bedracks, Gladiator mounting kits, Gladiator-specific crossbars, including Softopper versions on Gladiator.
13°	Soft Topper Series	Soft Topper bed racks for all truck models (except Gladiator).
20°	Universal / Crossbars	All XTR1, XTR3, XBRS Bed Racks, universal mounting rails, standard rack accessories (except Gladiator or Softopper)

9° angle

Gladiator Series

The 9° angle is dedicated to the Gladiator product line. This angle was engineered specifically for Gladiator rails and their mounting geometry, ensuring a flush, secure connection between your rails and any Xtrusion add-on accessories. This includes Softopper Gladiator Builds

Xo Skeleton Note: The XO.SKLTN Uses a complete different system not to be confused with Gladiator XTR 9 Degree components.

13° angle

Soft Topper Series

The 13° angle serves Soft Topper products. This intermediate angle provides the right compromise between load clearance and low profile when mounting accessories to Soft Topper rails and their compatible hardware.

Crossbars: XTR1 and XTR3 use 13° when mounted on Soft Topper setups.

20-degree universal rack crossbar — XTR universal and crossbar series

20° angle

Universal / Crossbars

The 20° angle is the default for all other Xtrusion products — universal mounting rails, standard crossbars, and general overland rack accessories. This is the most common angle in the industry and works with the widest range of roof rack and truck bed rack systems.

Exception: XBRS Crossbars use 9 Degree components, in case you decide to upgrade to full rack, so it remains compatible on joints.

Quick Reference

Xo Skeleton — Angle Breakdown

The Xo Skeleton uses two angles Gladiator Specific or Universal. However, some accessories might be compatible with both, because the top rail consolidates both angles into one. Crossbar mounts or awning mounts are compatible with both versions.

9° Angle

XOSKLTN Gladiator

Gladiator rail mounts
Gladiator-specific hardware
Gladiator crossbar slots

13° Angle

XOSKLTN

Soft Topper rail mounts
Soft Topper mounting kits
Soft Topper crossbar slots

Note: The Xo Skeleton never uses the 20° angle.

How To Choose

The Right Rack Angle,
Explained

Every XTR accessory — crossbars, mounting brackets, add-on hardware — is cut for one specific angle. The right angle depends on your primary rail system or vehicle setup. Choosing the matching angle ensures every component in your build aligns correctly and carries load as designed.

Identify your rail system. Gladiator = 9°, Soft Topper = 13°, universal = 20°.
Check your crossbar type. XTR1/XTR3 come in all three — order the one matching your rails.
Stick to one angle per build. Mixing angles creates misalignment and stress points.

What determines the rack angle I need? +

Your rack angle is determined by your primary rail system or vehicle setup. Gladiator rails use 9°, Soft Topper setups use 13°, and universal or standard rack accessories use 20°. Choosing the matching angle ensures every accessory — crossbars, mounting brackets, and add-ons — aligns correctly.

Can I use a 20° crossbar with a Gladiator rail? +

No. Gladiator rails are engineered for 9° accessories. Using a 20° crossbar on a Gladiator rail will result in misalignment and improper load transfer. Always match your crossbar angle to your rail system.

Do Soft Toppers and Gladiator rails use the same angle? +

No. Soft Toppers use a 13° angle while Gladiator rails use a 9° angle. These angles are not interchangeable. If you're building with both types, you'll need separate angle-specific accessory sets.

Are XTR1 and XTR3 crossbars angle-specific? +

XTR1 and XTR3 crossbars come in three angle variants — 9°, 13°, and 20° — to match each rack system. The 20° variant is the default and works with universal racks. The 13° variant is used when paired with Soft Topper setups. Order the angle that matches your primary rail system.

Why do overland racks use different angles? +

Different rack angles exist to accommodate varying vehicle roof geometries, rail profiles, and load requirements. The 9° angle works well with Gladiator-style tubular rails. The 13° angle provides a middle ground for Soft Topper mounting systems. The 20° angle is the industry standard for universal applications and offers maximum load clearance.

Description

High-strength socket head cap screws — sold in bags of 16. Choose your length/size from the dropdown above. These Grade 8 / 10.9 black zinc SHCS bolts are the same hardware we ship with our XTR bed racks and MOLLE accessories, so you can replace a lost fastener or expand your build with confidence.

Quantity: 16 screws per bag
Type: Socket Head Cap Screw (SHCS), hex / Allen drive
Thread: 1/4"-20 or 5/16"-18 (coarse)
Length: select from the dropdown (e.g. 5/8", 3/4", 1", and more)
Grade: Grade 8 / 10.9 (high tensile strength)
Finish: Black or Yellow zinc — corrosion-resistant and matte black to match your rack

The cylindrical socket head delivers maximum torque and a clean, industrial look on T-slot extrusion, brackets, and accessory hardware. Pairs with our 5/16-18 drop-in T-nuts for fast, no-weld mounting anywhere along the rack.

Common uses: bed rack assembly, MOLLE panel mounting, accessory and bracket installs, and any 5/16-18 T-slot or threaded application that needs a strong, reliable fastener. Not sure which length you need? Email [email protected] and we'll help you spec it.

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