Overview & Key Details
Compatible Machines
- Ultra 395 PC (Lo-Boy & Hi-Boy)
- Ultra Max II 490 / 495 / 595 (selected series)
- Ultra Max II 695 / 795 / 1095 / 1595
- GMAX II 3900 / 5900
- Max II (Hi-Boy) 1095
- Hydra-Clean 1535
Fitment can vary by production year/series. Always verify with your sprayer’s parts manual or contact us with your model & serial for confirmation.
Product Description
The Graco 111040 Nylock lock nut is an OEM nylon-insert lock nut used in multiple Graco airless sprayers and cleaning systems. The nylon collar provides vibration-resistant retention, helping critical fasteners stay secure under job-site conditions.
Quick Specs
| Part Number | 111040 |
| Item | Nylock lock nut (nylon-insert locking nut) |
| Compatibility | Used across various Ultra / Ultra Max II, GMAX II, and selected Hydra-Clean assemblies |
| Function | Resists loosening from vibration and repeated duty cycles |
| Origin | Genuine Graco replacement part |
Where It’s Commonly Used
- Frame/handle and carriage hardware (Hi-Boy/Lo-Boy carts)
- Pump/siphon bracketry and accessory mounts
- Guard, shroud, or hose-management fixtures
Installation Tips
- Start threads by hand to avoid cross-threading; tighten to equipment-specified torque.
- Do not apply threadlocker unless explicitly called out in the Graco manual.
- Replace if nylon ring is worn, glazed, or nut no longer holds tension.
Frequently Asked Questions
It is used across many Ultra and Ultra Max II models (e.g., 395, 490/495/595, 695/795/1095/1595) but usage can differ by series and year. Check your parts diagram for an exact callout of 111040 on your unit.
Nylock nuts can be reused a limited number of times, but the nylon insert loses holding power with wear/heat. If the nut spins freely or won’t hold torque, replace with a new Graco 111040.
Torque varies by the assembly and bolt size. Refer to your sprayer’s service manual for the exact specification on the joint where 111040 is used.
For safety and reliability, use genuine Graco hardware or an exact-match grade and thread. Mixing hardware may affect durability or warranty.
Match the part number from your parts diagram (111040) and verify location in the exploded view. If unsure, share your model & serial with us and we’ll confirm fitment before you buy.
