Skateboard Screws 2026: Sizes, Torque and Tightening Guide

When your skateboard screws back off, you find out the first time your truck wobbles on a flat street. A loose kingpin, a spinning axle bolt, or hanger bolts that have worked themselves loose under weeks of impact change how the whole board responds: turning gets soft, the pop loses its crispness, and the setup starts to creak and rattle under your feet. Most riders fix it by tightening everything with whatever tool is in their pocket. That solves the symptom, but it does not solve the cause, and by the next session the hardware is loose again.

This guide covers skateboard screws end to end: what each piece of hardware holds, the sizes you will actually find in a truck hardware bag, how tight is tight enough when no manufacturer publishes an official torque spec, and the step-by-step routine that keeps a setup stable from session to session. From building and rebuilding trucks for street, park, and transition skating, I can tell you that hardware maintenance is the cheapest reliability upgrade in the sport. A ten-minute check with a T-tool prevents the vast majority of “my trucks feel dead” complaints I hear from skaters.

Published: September 10, 2026

What Skateboard Screws Actually Hold Together

A skateboard has two groups of screws that matter for how the board behaves: the deck screws that clamp each truck to the deck, and the truck hardware that holds the truck itself together. Most hardware confusion happens because riders treat all of them as the same thing. They are not. Each group has its own thread size, its own length, and its own failure mode.

The deck screws (usually four per truck, eight per board) carry the entire load of every landing you take. When they loosen, the truck shifts on the deck, the board feels loose and noisy, and in the worst case a screw can work itself free entirely. The truck hardware does three separate jobs: the kingpin bolt acts as the pivot that lets the hanger turn, the two hanger bolts clamp the hanger to the baseplate on either side of that pivot, and the two axle bolts with axle nuts hold the wheels in place while carrying lateral loads every time you turn or land.

One more detail worth knowing: virtually all of these fasteners use fine-thread sizes (20 or 24 threads per inch) rather than coarse thread. That is not an accident. Fine threads resist vibration loosening far better than coarse ones, which is exactly what you want in hardware that takes a direct hit every time you land an ollie. This is also why you cannot swap in a random bolt from a hardware store and expect it to stay tight.

Skateboard Screw Sizes: The Complete Hardware Reference

The table below is the reference I keep in my back pocket when I am rebuilding trucks. It lists the standard pattern for US street trucks from the major brands; metric variants (M10 hanger bolts, M12 kingpins) show up on some European and longboard trucks, so always match what you are replacing rather than guessing from memory.

Piece	Thread size	Typical length	Qty per truck	What it does
Kingpin bolt	1/2-20	about 1 7/8 in	1	Pivot between hanger and baseplate; controls turning stiffness
Kingpin castle nut	1/2-20	n/a	1 (+ cotter pin)	Locks the kingpin at the set length so it cannot back off
Hanger bolts	1/2-20	about 1 3/4 in	2	Clamp the hanger to the baseplate on either side of the pivot
Axle bolts	3/8-24	1 1/2 to 1 5/8 in	2	Pass through the hanger and hold the axle nut
Axle nuts	9/16-20 (common)	n/a	2	Clamp the wheel to the axle and set wheel clearance
Deck screws	M4 (4 mm) x 30-32 mm	30-32 mm	4 (8 per board)	Clamp the truck baseplate to the deck

Thread patterns are the industry-standard sizes across the major US street truck brands; verify against the hardware you remove, since longboard and European trucks can differ.

Two of these entries are worth pausing on. The kingpin uses a castle nut with slots on its underside: once it is tightened to the right feel, a split cotter pin is pushed through one of the slots and bent over the nut. That is a positive mechanical lock, which is why a properly pinned kingpin does not back off under vibration the way a plain nut can. The axle bolt is the smallest and thinnest piece in the whole setup, and it is the one that most often gets replaced with the wrong part, because it is easy to grab a similar-looking bolt from a shelf and wonder why the axle nut will not seat.

Why Skateboard Screws Loosen: The Three Real Causes

Loosening on a skateboard is almost never random, and it is rarely the screw itself being cheap. It is one of three mechanical effects, and knowing which one you are dealing with changes the fix.

1. Impact-driven loosening

Every landing sends a shock wave from the wheels through the axles, the hanger, the bushings, and the kingpin into the deck screws. Repeated high impacts slowly work threads apart, especially on hardware that was never fully tightened in the first place. This is the dominant cause for street and park skaters. The fix is a proper initial tighten to the feel described below, plus a recheck after heavy sessions.

2. Vibration cycling

Between hard hits, the continuous vibration of rolling over pavement ratchets nuts and bolts in the loosening direction by tiny increments. Fine-thread fasteners (which skate hardware uses) are specifically chosen because they resist this, but they do not eliminate it. This is why a deck screw that felt perfectly tight on Saturday can be a half-turn loose by Wednesday. It is also why lock washers and lock nuts are common on some hardware bags.

3. Overtightening backlash

This one surprises people: over-tightened hardware loosens too. When a kingpin is cranked down hard, the bushings compress past their working range and the metal surfaces of the hanger and baseplate are forced into constant contact. Every turn then scrapes and flexes the joint, and that flexing works the threads out over time. A board that was “tightened really hard” and then starts feeling loose within two sessions is almost always this. The cure is backing the nut off until the bushings have room to work, and re-pinning the kingpin at the correct position.

How Tight Is Tight Enough: Working Without a Torque Wrench

No major truck manufacturer publishes an official torque specification for skateboard hardware, and that is not an oversight. Skate hardware is tuned by feel and by the mechanical lock of the cotter pin, not by a torque number, because the correct tightness depends on your bushing hardness, your weight, and your skating style. What the industry does standardize is the procedure: how much a bolt should resist, and how the kingpin is locked. Here is the reference table I use, based on how the major brands’ service notes describe correct setup.

Fastener	Target feel	Check method	Wrong sign
Kingpin	Snug plus one partial turn; bushings compress with visible deflection	Foot-tilt test: hanger moves a few degrees, then stops	No play (too tight) or hanger rattles free (too loose)
Hanger bolts	Firm hand-tight with tool; no hanger wobble side to side	Grip hanger and try to twist it against the baseplate	Hanger rocks or the joint squeaks under load
Axle bolts	Snug; axle does not rotate in the hanger	Try to spin the axle by hand at the nut	Axle spins freely; wheel wobbles on the hanger
Axle nuts	Snug with 1-3 mm wheel clearance to hanger	Spin the wheel: no rub, no wobble, slight gap visible	Wheel rubs the hanger or spins with visible wobble
Deck screws	Firm; baseplate sits flat with no lift at corners	Press on truck baseplate corners; no rattle or movement	Screws spin in stripped holes or truck shifts under pressure

Procedures follow the feel-based setup method used across major US truck brands; individual brands do not publish numeric torque values for street trucks.

If you do want numbers for reference, the fastener grades involved are standard: skateboard hardware is typically made to Grade 8 or 8.8/10.9 strength, and general engineering guidance puts a fully tightened 1/2-20 Grade 8 bolt somewhere in the 30-40 ft-lb range. But treat that as an upper bound, not a target. Skate setup lives well below that, because the cotter pin and the bushing compression are the real locking mechanisms. A torque wrench is a useful sanity check for spotting a cross-threaded or stripped bolt, not a daily tool.

Skateboard Screw Tools: What You Actually Need

The entire hardware job can be done with two tools: a T-tool (a three-arm hex key) and, for deck screws, a Phillips or Torx driver. Everything else is convenience. Here is what fits where.

T-tool sizes

Standard T-tools carry three arms sized for the three most common truck fasteners: 8 mm for the kingpin castle nut, 7 mm (or 5/16 in on older hardware) for the hanger bolts, and 5 mm for axle nuts on some brands. The trick to a good T-tool is that all three arms work independently, so you can hold one fastener while turning another, which is essential for the kingpin because it needs the castle nut held square. If a tool is described only as a “skate tool” with a single hex size, it is not a T-tool; it is a wrench, and it will not let you adjust a kingpin properly.

Deck screws: Phillips vs Torx

Most pre-assembled boards ship with Phillips-head M4 deck screws, but a growing number of pro models and a lot of replacement hardware use Torx (usually T10) because the star profile resists cam-out under high torque and is far harder to strip in the deck wood. If you are replacing deck screws, match the head type of the nuts already in the bag, and use a driver that matches exactly. A Phillips driver on a Torx screw, or a slightly wrong size of either, is the single most common cause of a stripped screw head. When a head does strip, a slightly undersized driver driven in with downward pressure usually recovers it; the last resort is drilling out the screw and tapping a new thread, which is where most riders give up and replace the truck mounting area’s hardware entirely.

Step-by-Step: Checking and Tightening All Skateboard Screws

This is the exact routine I run on a board before a session, and the order matters. You go from the truck internals outward, because tightening the deck screws before the truck hardware is correct just locks a sloppy truck in place. Work with the board face-down on a hard surface.

1. Flip the board and inspect visually. Look at every screw head: is anything cross-threaded (head sitting crooked), corroded, or missing its washer? A missing washer between the hanger bolt head and the hanger is the most common silent mistake after a rebuild.
2. Check the axle nuts and axle bolts first. Spin each wheel and watch for rub and wobble. If the axle bolt spins in the hanger, snug the bolt, then set the axle nut so the wheel has 1-3 mm of clearance to the hanger and no wobble. The axle bolt carries lateral load; a loose one is how wheels work themselves off at speed.
3. Tighten the hanger bolts. With the truck under the board, grip the hanger and try to twist it against the baseplate. If you feel any rock, snug both hanger bolts evenly, alternating a half-turn on each so the hanger does not bind. The hanger should be fixed to the baseplate but still pivot on the kingpin.
4. Set the kingpin and re-pin it. This is the only fastener with a lock. Back the castle nut off until you can tilt the hanger freely by foot, then tighten until you get the target feel: the hanger moves a few degrees under foot pressure, then the bushings stop it. There should be a small amount of deflection, not zero, and not a wide free rock. When it is right, align a slot in the castle nut with the hole in the kingpin, push a new cotter pin through, and bend both ends flat. Always use a fresh pin; a bent-back old pin can pull free.
5. Check the deck screws. Press down on each corner of each truck baseplate. If the truck shifts, rattles, or a corner lifts, snug that screw a quarter to half turn. Go around the truck twice, like a lug nut pattern, so the baseplate seats evenly. Do not crank these down; the clamping force needed to hold a baseplate is modest, and over-torquing M4 screws is how the threads pull out of the 7-ply wood.
6. Final ride check. Stand on the board and rock each truck side to side. You should feel bushing compression with a defined stop, not a dead joint and not a loose rattle. Spin the wheels one more time for rub. If anything changed, recheck the fastener that moved, because a truck that rocks under body weight has a loose hanger bolt or kingpin, not a loose deck screw.

The whole routine takes about ten minutes if you are organized, and the cotter pin is the only consumable. If you follow the order above, a board that was loose at the start will be stable for weeks, because you have addressed the pivot first and the clamp second, which is the order the loads actually travel in.

Kingpin Adjustment: Where Screws Meet Setup

The kingpin is the only screw on a skateboard that is also a setup dial. Its position under the castle nut changes how much the hanger can tilt before the bushings bind, which is the difference between a truck that carves and a truck that feels locked. Most “my board does not turn” and “my board turns too much” problems are kingpin position problems, not screw problems, and the two are linked because the kingpin is the part that loosens the most.

The working relationship: more kingpin exposure (nut backed off, more of the bolt sticking out) gives more pivot travel and a looser, more carvy feel. Less exposure gives a stiffer, more stable feel with less travel. The correct position for you is the one where the hanger deflects under foot pressure and then stops with a firm, defined limit. That stop is the bushing at its working limit, and it is what makes the board feel planted. If you match the kingpin position to your bushing hardness (softer bushings need slightly less kingpin, harder bushings can run with more), the setup stays stable and the kingpin stays tight, because the joint is not being overloaded in either direction. The full bushing-to-kingpin interaction is covered in depth in our guide to skateboard bushings: sizing, hardness, and setup, which pairs directly with this one.

When to Replace: Signs Skateboard Hardware Is Worn Out

Screws are the cheapest parts of the board and the most replaceable, but they do wear. Tightening is the maintenance; replacement is for when the fastener itself can no longer hold. These are the signs I look for during the check routine:

• Stripped or rounded threads on a bolt or nut, where the tool spins and the fastener does not advance. Once a thread is rounded, the fastener is done; replace the pair, not just the piece that stripped.
• Stretched or deformed cotter pins and castle nuts. A castle nut with worn slots, or a pin hole that has spread, will not lock. Replace the castle nut with any hardware upgrade; pins are single-use by design.
• Corrosion that jams the fastener in place. A kingpin that will not back off is a sign of corrosion at the threads, and forcing it risks shearing the bolt. Soak the joint in a penetrating oil for a day, then work it free; if it is seized solid, the hardware is cheaper to replace than to destroy the hanger.
• Bent axle bolts or axle nuts from impact. A bent axle bolt is a structural fastener that has taken a hit it was not meant to; replace both axles and nuts as a set.
• Deck screws that will not seat in the mounting holes. Stripped deck holes are a deck problem, not a screw problem: the wood threads have pulled out. The fix is a longer screw, a wood-filler re-tap, or in severe cases a new deck, which is why the deck screw check is part of every routine.

Maintenance Schedule: How Often to Check Skateboard Screws

There is no universal interval, because it depends on how hard you hit and how new the hardware is. But the pattern is consistent enough to give real numbers. When I set up a new board, the hardware is tight for the first few sessions, then the joints settle and everything loosens a step. After that it runs at a steady rate. Based on that settling curve and what I see from riders:

Skate style	Check frequency	Focus
Casual / cruising	Every 2-3 weeks	Deck screws and axle nuts; light impact means slow loosening
Street / park (daily)	Weekly, plus after any hard landing	Kingpin re-pin, hanger bolts, all deck screws; high impact cycling
Transition / bowl	Weekly; re-pin the kingpin every 2-3 sessions	Sustained speed loads the axles; watch axle nuts most of all
New board, first month	After the first 2-3 sessions, then settle into the above	The settling loosening happens early; expect to re-tighten once, then it stabilizes

Intervals are field experience estimates from daily street and park skating; adjust to your impact level and how loose the hardware feels, not the calendar alone.

Skateboard Screw FAQ

How tight should skateboard screws be?

Tight enough that nothing moves under load, loose enough that the joints still flex where they should. The kingpin should let the hanger tilt a few degrees before the bushings stop it, the hanger bolts should show zero hanger rock, the axle bolts should not spin in the hanger, and the deck screws should seat the baseplate flat with no corner lift. If a fastener is so tight that the board cannot turn at all, or so loose that anything rattles, it is wrong in one direction or the other.

How often do I need to tighten my skateboard?

For daily street or park skating, check the hardware about once a week and re-pin the kingpin every two to three sessions. Casual riders can stretch that to every two or three weeks. Every board needs a re-tighten after the first few sessions as the hardware settles, and any board that takes hard landings should get a quick axle and deck-screw check the same day.

What size is a skateboard kingpin bolt?

The standard US street truck kingpin is 1/2-20, meaning a 1/2 inch diameter with 20 threads per inch, at roughly 1 7/8 inch long. It is paired with a 1/2-20 castle nut and a cotter pin. The hanger bolts on the same trucks are the same 1/2-20 thread. The axle bolts are smaller at 3/8-24. If you are replacing one, match the piece you remove, and buy a full hardware set rather than a single bolt so you know the thread is right.

Do skateboard screws need threadlocker?

No, and you generally should not use it. Skate hardware is designed to be adjusted regularly, and threadlocker would lock the kingpin at one position, which defeats the whole setup dial. The correct anti-loosening measures are a proper initial tighten, fine-thread fasteners, and a cotter pin on the kingpin. If a screw is loosening despite all of that, the cause is usually overtightening, a cross-thread, or a worn fastener, all of which threadlocker would only hide while making the next adjustment harder.

Why do my skateboard screws keep loosening?

Three causes, in order of likelihood: the fastener was never fully tightened to begin with, the joint is overtightened and flexing the threads out, or vibration is ratcheting a fine-thread fastener that is at the edge of its clamp. The fix is to run the full check routine above once, get every fastener to its correct target feel, re-pin the kingpin with a fresh cotter pin, and then recheck on the schedule for your skating style. If a specific screw still works itself loose within a session, that fastener or its mating threads are worn and it is time to replace the pair.

Sources

• Indy Trucks — truck and hardware specifications from a major US street truck manufacturer.
• Rider Skateboards — deck and assembly reference from a US street board brand.
• Thread (reference) — thread sizing, pitch, and fine-thread vibration behavior used in the sizing section.

See Also

• Skateboard Bushings 2026: Complete Setup and Buyer Guide — the bushing-to-kingpin pairing this hardware setup depends on.
• Best Skateboard Trucks in 2026: Complete Buyer Guide — which trucks to put this hardware on.
• Clean Skateboard Bearings 2026: Full How-To Guide — the wheel-side maintenance that pairs with a tight axle setup.

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