Before you request an attachment or a mounting plate, identify the mechanical coupler your machine and the attachment actually use. Most full-size skid steers and compact track loaders built since the early 2000s share a mutually compatible universal skid steer quick attach (SSQA) interface, and Bobcat's Bob-Tach belongs to the same family with wedge-type lower locks. Mini and stand-on loaders use a narrower mini universal plate or a proprietary plate that a full-size attachment will not fit. Photograph both couplers square-on, record the latch type, and measure the hook spacing and plate width. A physical match narrows candidates; it is not confirmation of hydraulic, electrical or capacity fitment, and this guide supplies no torque, clearance or operating approval.
- Family
- Universal SSQA / Bob-Tach, mini universal, or proprietary
- Evidence
- Photograph and measure both couplers; record the latch type
- Boundary
- A physical match is not hydraulic, electrical or capacity fitment
By SkidSteerZone editorial team · Published October 5, 2026 · Updated October 5, 2026
Know which interface families you are choosing between
Skid steer and compact track loader attachments connect through a mounting interface, usually called a quick attach or quick tach. There are a few distinct families, and an attachment built for one will not reliably latch and hold on another.
Full-size machines built since roughly the early 2000s typically use a mutually compatible universal skid steer quick attach (SSQA): a top hook bar that the machine's upper hooks catch, plus a lower latch. Bobcat's Bob-Tach is the same family, using wedges rather than round pins for the lower lock. Industry references list the SSQA upper hook points at roughly 18 inches apart with a pair of about one-inch-diameter lower locking pins, and note that full-size machines from Bobcat, Cat, John Deere, Kubota, Case, New Holland, Gehl and Takeuchi share compatible geometry.
Mini skid steers, stand-on loaders and compact tool carriers do not use the full-size plate. Most use a narrower mini universal plate, sometimes called the Common Industry Interface (CII) or Toro-style plate. Bobcat mini track loaders use a proprietary Bobcat MT plate, and ASV or Terex minis use their own footprint.
Older and smaller machines can also use bolt-on or pin-on interfaces, where the attachment fastens directly to the loader arms rather than to a quick-attach plate. If your machine predates the universal era, confirm the interface from the machine documentation rather than assuming a quick-attach plate is present.
Identify the machine-side coupler
Start at the loader arms. Park on level ground, lower the coupler, shut down and follow the machine's Operation and Maintenance Manual and safety instructions before working near the interface. Use qualified help where the manual calls for it. This guide does not tell you how to support the machine or move a raised assembly.
Photograph the carrier plate square-on and close up. Record whether the lower lock is a manual lever, a cab-operated switch, or a through-pin. On a Bob-Tach coupler, upper hooks catch the top edge of the attachment plate while lower wedges extend downward through holes in the attachment mounting frame to lock the connection; a manual Bob-Tach has two latch handles at the rear of the carrier plate, while a Power Bob-Tach latches from the cab. Spring-loaded wedges must contact the lower edge of the mounting-frame holes; follow the machine manual when checking wear.
Measure the upper hook spacing and the overall plate width with a tape, and note the general condition: play in a latched attachment, cracks, a bent or scored pin, or wedges that will not seat. Worn levers, wedges, springs and pins are replaceable service items; a coupler that will not lock is a safety stop, not a fitment question.
If the lock hardware is the problem, the quick-attach components category covers levers, wedges and springs for loader attachment interfaces. Identify the exact machine before matching any part.
Identify the attachment-side plate
The attachment or the mounting plate carries the matching half of the interface: a top bar or lip the machine hooks engage, and holes or slots for the lower lock. Measure the plate's overall width, record the top-bar style, and note whether the lower engagement is a pair of holes for round pins or open slots for wedges.
A weld-on mounting plate is the most common way to put a non-quick-attach implement onto a skid steer. It is a flat steel plate, typically in the 1/4 to 1/2 inch thickness range, cut to the SSQA profile and welded to the implement frame. Buying the right blank plate still depends on identifying the machine-side interface first.
Compare the two halves before assuming they mate. Two plates in the same family can still differ in width, top-bar height or hole position, and SAE J2513's published scope leaves the locking-system design to the manufacturer.
| Evidence | It can help identify | It cannot confirm alone |
|---|---|---|
| Machine model and serial | The documentation branch and the interface the machine left the factory with | The current coupler if it has been changed or adapted |
| Upper hook spacing | Full-size SSQA versus a mini or proprietary family | That a same-family attachment will latch and hold |
| Latch type (wedge, pin, lever, switch) | Bob-Tach versus pinned SSQA, manual versus power | Wear condition or correct adjustment |
| Attachment plate width and holes | Whether the plate is cut to the same family | Load rating, hydraulic need or machine capacity |
| Adapter present | That two interfaces are being bridged | The offset, weight and capacity penalty without review |
Mini, stand-on and legacy machines: the model and serial decide
On mini machines, most brands (Toro Dingo, Ditch Witch, Vermeer, Boxer, Ramrod, Kanga and others) use the mini universal / CII plate. Industry references put that plate at roughly 22 to 23 inches wide with pin centres near 14 to 15 inches, against a full-size plate near 45 inches. Bobcat mini track loaders can use a proprietary MT interface. Skid Pro illustrates one MT pattern at about 35.5 inches wide with pin centres near 33 inches; its page distinguishes older MT50/MT55 variants. Those figures describe that illustrated pattern, not every MT coupler, and do not establish compatibility with a full-size SSQA attachment. Some newer Bobcat MT100 units offer a CII option from the factory. Details vary, so measuring the coupler and comparing it to the supplier's diagrams is the reliable check.
"It is a Bobcat" is not enough on the full-size side either. The smallest cab-style Bobcat skid steers, models such as the 310, 313, 450, 453, 463, 520, 530, 533 and 553F, and the S70, use a small plate that is not compatible with the universal SSQA plate. Machine model and serial number decide the interface.
For any machine that predates the universal era, or one you cannot identify from the coupler alone, treat the interface as unknown until the machine documentation or a reviewed supplier cross-reference confirms it. Unknown is a useful finding: it explains why ordering the most common plate would still be a guess.
What the interchange standard does and does not promise
A published standard defines the universal interface. SAE J2513 (June 2000) set dimensional limits for the loader attachment bracket and attachment interface on skid steer loaders of 4,500 kg operating mass or less, to allow interchangeability. It was withdrawn in May 2008 and the subject is now covered by ISO 24410.
Two limits matter for a buyer. SAE J2513's published scope sets dimensional limits for the interface and leaves the design of the locking system to the manufacturer. So "the plate meets the standard" is not the same as "this machine and this attachment latch and hold". A same-family match plus worn or mismatched lock hardware can still fail to seat.
This article owns the mechanical interface identification decision. Hydraulic flow and pressure, coupler and case-drain fittings, and electrical control needs are a separate review covered by the attachment fitment checklist. An attachment can bolt on physically and still be unsuitable for the machine or the job.
When an adapter plate is the answer, and what it costs
An adapter plate can bridge two interfaces, for example putting a mini universal attachment on a full-size machine, or a skid-steer attachment on a tractor loader. Reviewed coupler and mounting products are kept in the couplers and mounts category, separate from unconfirmed accessories.
An adapter is a deliberate trade-off, not a free fix. It moves the attachment forward, commonly by about 50 to 100 mm, and adds weight, roughly 60 to 100 kg for full-size units by industry-reference figures. Moving the load forward and adding mass reduces effective lift capacity and breakout force, and it changes how the machine handles. Factor that into the attachment choice, and share the adapter plan when you request a quote.
Send an interface evidence pack for quote review
A complete request reduces wrong-interface and wrong-plate risk.
- Machine manufacturer, exact model and full serial / PIN range.
- Square-on and close-up photos of the machine-side coupler.
- Measured upper hook spacing and overall plate width.
- Latch type: manual rear handles, cab switch (Power Bob-Tach), or through-pin.
- Attachment-side plate: width, top-bar style, and pin holes or wedge slots.
- Any adapter plate in use, and any known interface change from stock.
- The attachment or mounting plate you are considering, and the intended work.
Move from interface identification to a fitment-reviewed quote
Once the interface family is identified, use the attachment catalog to find the product family, and the attachment service parts section for coupler and mounting wear parts. Then send the evidence pack through the quote path. Skid Steer Zone is quote-only: coupler photos and measurements narrow candidates but do not independently confirm fitment, and nothing here is stock, price or an operating approval.
FAQs
- How do I know if my skid steer has a universal quick attach?
- Most full-size skid steers and compact track loaders built since the early 2000s do. Check the carrier plate for a top hook bar with a lower lever or pin lock, measure the upper hook spacing (roughly 18 inches on full-size SSQA), and confirm the interface against the machine model and serial. The smallest older machines and mini loaders are exceptions.
- Is Bob-Tach the same as universal quick attach?
- It is the same family. Bob-Tach is Bobcat's name for its quick-attach coupler; it uses upper hooks over the plate's top edge and lower wedges extending downward through the attachment mounting-frame holes, rather than round pins. Modern full-size Bob-Tach machines connect to universal attachments in most cases, but confirm the machine model, serial and plate fit before buying.
- Will a standard skid steer attachment fit my mini skid steer?
- No. Mini and stand-on loaders use a narrower mini universal plate or a proprietary plate (such as Bobcat MT). A full-size attachment plate is far too wide. You would need an attachment built for the mini interface, or an adapter, which carries an offset and capacity penalty.
- What measurements should I take of my quick-attach coupler?
- Upper hook spacing, overall plate width, and the lower-lock detail: pair of holes for round pins, or open slots for wedges. Photograph the coupler square-on and record the latch type. Send those with the machine make, model and serial.
- Does an adapter plate affect performance?
- Yes. An adapter moves the attachment forward, commonly about 50 to 100 mm, and adds weight, roughly 60 to 100 kg for full-size units. That reduces effective lift and breakout force and changes handling. Use one deliberately and tell the supplier it is in the setup.
- The attachment plate meets the SAE or ISO standard, so will it fit?
- Not necessarily. SAE J2513's published scope sets dimensional limits for the interface and leaves the locking-system design to the manufacturer. A same-family match still needs the actual coupler and attachment plate compared, and the lock hardware checked for wear, before fitment is confirmed.
Sources and limitations
The sources describe the Bob-Tach mounting mechanism, the interchange standard and its scope, and typical industry-reference dimensions for full-size and mini interfaces. No universal fitment, load rating, hydraulic, clearance or operating approval is claimed. Dimensions are typical figures, not tolerances; the exact machine and attachment documentation and a reviewed supplier cross-reference control the final decision, which remains quote-only.
- Bobcat Company — Bob-Tach and X-Change Mounting Systems: mounting-system parts identity. The S650 manual below supplies the model-specific locking and wear-check evidence.
- Bobcat Company — S650 Operation & Maintenance Manual, 6987167-EN (October 2011): model S650, serial A3NW11001 and above, pages 107 and 182–183: WEDGES DOWN locks the connection; wedges extend through the attachment mounting-frame holes. Hosted by Dumarent. Follow the manual for the exact machine.
- SAE International — J2513 Coupling of Attachments to Skid Steer Loaders (June 2000, withdrawn May 2008), and ISO 24410: SAE J2513's published scope sets dimensional limits for the interface on loaders of 4,500 kg operating mass or less and leaves locking-system design to the manufacturer; ISO 24410 covers current interchange requirements.
- SkidSteerAttachments.ca — Bob-Tach vs Universal Quick Attach, and skidsteers.com — Universal Quick Attach Adapter Buying Guide: full-size hook spacing near 18 inches, one-inch lower pins, cross-brand compatibility, and adapter offset and weight figures.
- Skid Pro — Different Mini Attach Plates: illustrated CII and MT patterns, including the 35.5-inch-wide MT pattern and older MT50/MT55 variants. Dimensions apply to the illustrated patterns, not all MT couplers.
- Skid Pro — Universal vs Brand-Specific Mini Skid Steer Attachments, and Skid Steer Solutions — Attachment Connection: mini universal / CII plate and proprietary Bobcat MT and ASV mini plates, with typical dimensions and the smallest non-universal Bobcat models.