Top 10 Shoulder Screw Brands in 2026
Need shoulder screws for a build and not sure which brand to trust with the order? With so many shoulder screw brands selling similar-looking parts, the differences that actually matter are easy to miss.
The right shoulder screw brand depends on the job. A pivot in a machine guard, a stripper plate in a die, a standoff on a circuit board, each one leans on different strengths, from material and tolerance to plain availability. Picking on price alone tends to bite you later.
Below we rank ten shoulder screw brands for 2026, weighing build quality, material choice, standards, and how easily you can get parts in hand. The list mixes makers, distributors, and online-first sellers, so there is a fit for most ways of buying.
Quick Comparison of Top Shoulder Screw Brands in 2026
| Brand | Best For | Strengths |
| UPS Lakshmi | Made-to-order shoulder screws on a low minimum | Custom-to-drawing, h9 shoulder, ISO 7379 and ANSI B18.3 |
| Fabory | European plants wanting one fastener source | 400,000+ items, online ordering, stocked-at-bench programs |
| Lyn-Tron | Electronics, PCB, and connector hardware | US-made precision, RoHS, CNC and EDM machining |
| Holo-Krome | Safety-critical, high-strength socket parts | Cold-formed, Grade 12.9, HOLO-CODE traceability |
| Aspen Fasteners | Fast self-service online orders | North American centers, bulk pricing, custom-to-print |
| Unbrako | Premium high-tensile socket fasteners | Heritage since 1911, tested strength, accredited lab |
| Fastenal | Multi-site availability and replenishment | Largest North American distributor, branches and vending, VMI |
| AMPG | Custom and hard-to-find US-made parts | Same-day stock, Swiss-machined specials, titanium options |
| JW Winco | One-source standard machine components | Inch and metric, CAD models, ISO 9001:2015 |
| Camcar | A heritage name bought through distribution | Drive-system pedigree, alloy-steel parts, long track record |
10 Top Shoulder Screw Brands to Know in 2026
1. UPS Lakshmi
UPS Lakshmi builds shoulder screws to order from its plant. The draw here is custom work. You send a drawing, and the team turns out the shoulder length, diameter, material, and finish you asked for, checked batch by batch before it leaves.
The standard line meets ISO 7379 and ANSI B18.3, with the shoulder held to h9. For corrosive jobs you can pick SS-304 or SS-316 with a passivated finish, and for heavy loads, heat-treated alloy steel. That spread covers most mechanical needs without forcing a compromise.
UPS Lakshmi parts show up in aerospace, automotive, industrial machinery, and wind hardware. They also ship to the USA. If your project calls for a non-catalog shoulder screw and you would rather not pay a steep minimum, it is a sensible place to begin.
Founded: 2006
What Shoulder Screws Does UPS Lakshmi Make?: Stainless (SS-304, SS-316) and heat-treated alloy steel shoulder bolts to ISO 7379 and ANSI B18.3, with custom shoulder lengths and finishes built to drawing.
Which Industries Does UPS Lakshmi Serve?: Aerospace, automotive, general industrial, and wind energy.
What Should Buyers Know About UPS Lakshmi Shoulder Screws?: Parts hold h9 shoulder tolerance, ship with batch inspection, and can be made to print when a standard size will not fit. Stainless versions carry a passivated finish for corrosion resistance.
2. Fabory
Fabory has sold fasteners since 1947, when the Borstlap family started trading in the Netherlands. Today it runs from Tilburg as one of Europe’s larger fastener houses, with a catalog north of 400,000 items that includes shoulder screws.
What buyers get is depth plus logistics. Order online, or lean on the KeepStock program that keeps parts topped up at your bench. An accredited lab handles testing and certificates when a job needs paperwork.
For a plant inside Europe that wants a single fastener source and help keeping shelves stocked, Fabory works well. Most orders ship from its Tilburg and Brno warehouses on short lead times.
Founded: 1947
What Does Fabory Offer?: A large catalog of fasteners, including shoulder screws, with e-commerce ordering and vendor-managed stock.
What Should Buyers Know About Fabory Shoulder Screws?: Fabory serves Europe best, ships from central warehouses within tight lead times, and can supply certificates through its accredited laboratory.
3. Lyn-Tron
Lyn-Tron has built electronic hardware in the United States since 1956, starting in Los Angeles and now running from Spokane, Washington. Precision shoulder screws sit beside its standoffs, spacers, and connector parts.
The focus is electronics, so tolerances stay tight. CNC, multi-spindle, and EDM machining let the company hold the fits that circuit boards and chassis demand. Most parts are made in the USA and meet RoHS limits on hazardous materials.
If your shoulder screws end up in a PCB stack, a connector, or a piece of computer hardware, Lyn-Tron is a good match. Keeping production domestic also steadies lead times when supply gets tight.
Founded: 1956
What Does Lyn-Tron Offer?: US-made precision shoulder screws, standoffs, spacers, and connector hardware for electronics.
What Should Buyers Know About Lyn-Tron Shoulder Screws?: Parts are made in the USA, mostly RoHS compliant, and machined to the tight tolerances that PCB and chassis assemblies need.
4. Holo-Krome
Holo-Krome has turned out US-made socket-screw products since 1929, and shoulder bolts are part of the family. The brand made its reputation on cold forming, which aligns the grain in the part for better fatigue life than cut threads alone.
It now sits inside Fastenal’s manufacturing group and runs a large plant in Wallingford, Connecticut. Parts carry HOLO-CODE head markings for traceability, and socket screws reach Grade 12.9 for high-load work.
Holo-Krome does not sell direct, so you order through a distributor. For safety-critical jobs that want documented, US-made strength, it is a strong choice.
Founded: 1929
What Does Holo-Krome Offer?: US-made socket-screw products, including shoulder bolts, set screws, and high-strength cap screws.
What Should Buyers Know About Holo-Krome Shoulder Screws?: Parts are cold-formed for strength, carry HOLO-CODE traceability, and sell through authorized distributors rather than direct.
5. Aspen Fasteners
Aspen Fasteners put its catalog online so buyers can spec and order without a sales call. Shoulder screws live among its inch and metric bolts, nuts, and washers, ready to add to a cart in bulk.
Distribution centers across the United States, Mexico, and Canada feed quick shipping on stock parts. Need something special? Aspen can build to your print through its production partners.
This one suits self-starters. If you already know your spec and want shoulder screws shipped fast with minimal back-and-forth, Aspen keeps it simple.
Founded: 1961 (offline store) and 2009 (online platform)
What Does Aspen Fasteners Offer?: Inch and metric industrial fasteners, including shoulder screws, sold online with bulk pricing and custom-to-print options.
What Should Buyers Know About Aspen Fasteners Shoulder Screws?: Stock parts ship from North American distribution centers, often same day, and you handle the whole order online without waiting on a sales rep.
6. Unbrako USA
Unbrako USA goes back to 1911 and the Standard Pressed Steel Company in Pennsylvania. The name nods to the word unbreakable, and the brand has long served as a reference point for high-tensile socket fasteners, shoulder screws among them.
Strength and repeatability sit at the center of the pitch, backed by an ISO/IEC 17025 lab. The stainless range covers the usual A2 and A4 classes, while the high-tensile parts aim at heavy mechanical duty.
You buy Unbrako through distribution, and US orders run through unbrakousa.com. For buyers who want a premium socket-screw name with tested numbers behind it, it belongs on the list.
Founded: 1911
What Does Unbrako Offer?: High-tensile socket fasteners, including shoulder screws, set screws, and socket head cap screws, plus a stainless range.
What Should Buyers Know About Unbrako Shoulder Screws?: The brand focuses on tested high-tensile strength, backs parts with an accredited lab, and sells through distribution rather than direct.
7. Fastenal
Fastenal grew from a single Winona, Minnesota store in 1967 into the biggest fastener distributor in North America. It does not make most of what it sells. Instead it stocks shoulder screws from many makers and gets them close to you.
Reach is the selling point. Thousands of branches, on-site locations, and vending machines mean a replacement part is rarely far away, which matters when a line stops for want of one screw.
For operations spread across many sites that value availability and managed inventory, Fastenal fits. Its manufacturing arm, including Holo-Krome, also gives you a path to higher-strength socket parts.
Founded: 1967
What Does Fastenal Offer?: Distribution of shoulder screws and a broad fastener catalog, plus vending and managed-inventory programs.
What Should Buyers Know About Fastenal Shoulder Screws?: You buy through branches or on-site service rather than a single factory, which makes Fastenal strong on availability and replenishment across multiple locations.
8. AMPG
AMPG, or Accurate Manufactured Products Group, has made fasteners in Indianapolis since 1987, and shoulder screws are a headline product. The family-run shop leans into hard-to-find, custom, and architectural parts, all made in the USA.
Stock items ship the same business day from a catalog of more than 90,000, and specials run on CNC Swiss lathes straight from your drawing. Material options include 316 stainless, aluminum, titanium, and a few lightweight alloys you will not find everywhere.
When a standard screw will not do and you need it quickly, AMPG is built for that job.
Founded: 1987
What Does AMPG Offer?: US-made shoulder screws and shoulder bolts, sex bolts, washers, and shims, with strong custom and made-to-print capability.
What Should Buyers Know About AMPG Shoulder Screws?: Stock parts ship same day, custom parts run on Swiss lathes from your print, and material choices reach beyond steel into titanium and aluminum.
9. JW Winco
JW Winco supplies standard machine components in inch and metric, and shoulder screws are part of a catalog that also holds knobs, levers, pins, and clamps. The North American operation dates to 1978 and works as both maker and distributor under ISO 9001:2015.
The appeal is one-source convenience plus solid data. Winco publishes dimensions and 3D models, so you can check fit in CAD before you commit to a part.
If your build already uses Winco hardware, pulling shoulder screws from the same catalog trims your vendor list and keeps purchasing tidy.
Founded: 1978 (North American operations)
What Does JW Winco Offer?: Inch and metric standard machine components, including shoulder screws, plus operating and clamping hardware.
What Should Buyers Know About JW Winco Shoulder Screws?: Parts come with full dimensional data and CAD models, ship from North American stock, and fit naturally into a build that already uses Winco components.
10. Camcar Innovations
Camcar Innovations carries one of the older pedigrees in American fasteners, dating to 1943 in Rockford, Illinois. It passed through Textron Fastening Systems and Acument over the years and still stands behind well-known drive and recess designs.
These days Camcar Innovations handles research and design, then routes production to an authorized network of makers. Camcar-branded shoulder screws, mostly alloy steel, reach buyers through distributors and online sellers.
If a long engineering record matters to you and you buy through distribution anyway, keep Camcar in view. Check stock and lead time with your distributor, since the brand runs on a partner network.
Founded: 1943
What Does Camcar Offer?: Engineered fasteners and drive systems, with alloy-steel shoulder screws available through distribution.
What Should Buyers Know About Camcar Shoulder Screws?: Camcar designs and licenses through an authorized manufacturer network, so buy through a distributor and verify stock, finish, and lead time for the exact size you need.
Where Shoulder Screws Get Used
Shoulder screws do one thing well. They give a smooth, sized surface for parts to turn, slide, or seat against. Here is where that shows up most, and why the brand you pick should match the use.
Rotating and Pivoting Parts
The smooth shoulder makes a clean axle for things that spin or swing. Pulleys, gears, rollers, and linkage arms ride on it with low friction, while the threaded end anchors the screw without clamping the moving part.
Where you see it:
- Pulleys and idler wheels.
- Gear and cam assemblies.
- Hinged guards and access panels.
- Linkage and lever arms.
Linear Motion and Guides
When a part needs to slide rather than spin, the shoulder works as a guide post or bearing surface. The fit between shoulder and bore sets how smoothly the part travels, which is why tolerance counts here.
Where you see it:
- Slide plates and rails.
- Cam followers.
- Guided springs and plungers.
- Sliding panels on enclosures.
Tooling, Jigs, and Fixtures
In tool-and-die work the part is often called a stripper bolt. It guides a stripper plate and takes repeated impact, so strength and a precise shoulder length both matter.
Where you see it:
- Stripper plates in stamping dies.
- Jigs and fixtures.
- Mold components.
- Press tooling.
Electronics and PCB Assemblies
On circuit boards and chassis, small shoulder screws position boards, set spacing, and give panels a pivot. Cleanliness, light weight, and tight tolerance lead the spec sheet here.
Where you see it:
- Board mounting and spacing.
- Connector and panel hardware.
- Hinged access on enclosures.
- Standoff-style supports.
Adjustable and Load-Bearing Joints
Some joints need a fixed bearing surface that still lets parts move or adjust. The shoulder holds the spacing while the part flexes, rotates, or shifts under load.
Where you see it:
- Spring-loaded mechanisms.
- Adjustable stops and guides.
- Suspension and damping links.
- Load-bearing pivots in machinery.
Choosing the Right Shoulder Screw Brand
Pick the brand that fits how you buy and what you build. The list splits roughly three ways.
Makers like UPS Lakshmi, AMPG, Holo-Krome, and Lyn-Tron suit custom specs, high strength, or niche materials. Distributors like Fastenal and Fabory suit broad stock and steady replenishment across sites. Online-first sellers like Aspen suit quick, self-service orders. Heritage names like Unbrako and Camcar give you a familiar, established option through distribution.
Whichever route you take, hold the brand to a standard. Inch shoulder screws follow ASME B18.3, and metric ones follow ISO 7379. A brand that can quote to the standard and back it with material certificates is one you can plan around.
And if the part you need does not exist on the shelf, UPS Lakshmi builds shoulder screws to your drawing in stainless or alloy steel, with batch-by-batch inspection.
Frequently Asked Questions
How are shoulder screws sized?
By shoulder diameter and shoulder length first, then thread size. The thread is usually smaller than the shoulder, so a part might read as a quarter-inch shoulder with a 10-24 thread. Match the shoulder diameter to your hole and the shoulder length to your stack-up.
Are shoulder screws and stripper bolts the same thing?
They are the same part with two names. The term stripper bolt comes from tool-and-die work, where the screw guides a stripper plate. Shoulder screw and shoulder bolt describe the same design, with a smooth shoulder between the head and the threads.
Can I get shoulder screws in both inch and metric?
Yes. Most brands on this list carry both. Inch parts usually follow ASME B18.3, and metric parts follow ISO 7379. Pick the system your drawing uses, then confirm the brand stocks that range.
Do I need stainless, or will alloy steel do?
Alloy steel gives you the most strength for the price and suits dry, indoor loads. Stainless 303 or 316 earns its cost when moisture, chemicals, or salt are in play. For weight-sensitive or electronic work, aluminum or titanium may be the better call.