Graco 111040 Nylock lock nut

The Graco 111040 Nylock Lock Nut is a genuine OEM fastener designed to prevent loosening from vibration and ensure secure assembly on Graco sprayers.

Durable nylon-insert lock design
Used in Ultra, Ultra Max II, and GMAX II sprayers
Ensures stable and vibration-resistant fastening
Genuine Graco replacement part

$9.79

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Description

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.