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Jam Nut 3/4 - 16 Fine Thread - 7/16" High Automann JNF340 E - 1107 JNF340 - Automann - FLEETPRO PARTS & TIRES
Jam Nut 3/4 - 16 Fine Thread - 7/16" High Automann JNF340 E - 1107 JNF340 - Automann - FLEETPRO PARTS & TIRES
Automann

Jam Nut 3/4-16 Fine Thread - 7/16" High Automann JNF340 E-1107

In stock
SKU: JNF340
$0.54
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Fitment

Fits these trucks

Universal - Dana/Spicer, Reyco Granning, Standard Forge, Watson and Chalin, Hendrickson, and Mack Steering Linkage, Suspension Torque Rods, Axle Spindles
Always confirm your year, make & model before ordering.
Part numbers

OEM & interchange numbers

12 cross-refs
Euclid E-1107 Dana/Spicer 12052 Dana 12052DANA Mack 21AX220 Mack 21AX56 Mack 25089237 Hendrickson/Turner SA13008 Peterbilt 2309254008 Link 14752400 Reyco 8219758 Std. Forge 402101 Watson & Chalin 10025
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview

Ensure your suspension and axle adjustments stay exactly where you set them with this high-strength Jam Nut 3/4-16 Fine Thread distributed by FleetPro Parts & Tires. In the high-vibration world of heavy-duty trucking, a standard nut can back off, leading to alignment shift, loose steering components, and catastrophic hardware failure. Manufactured by Automann to strict Fleet Standard specifications, this low-profile jam nut is designed to "lock" primary nuts in place. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.

Vibration Resistance: The Jam Nut 3/4-16 Fine Thread Advantage

This Jam Nut 3/4-16 Fine Thread is engineered for precision applications where space is tight but security is non-negotiable. Featuring a 7/16-inch height, it provides a low-profile footprint perfect for tie rod ends, torque rods, and axle spindles. The 3/4"-16 fine threading allows for micro-adjustments and superior clamping force compared to coarse threads, ensuring your suspension geometry remains stable even under the heaviest payloads and roughest highway conditions.

At FleetPro Parts & Tires, we know that even the smallest piece of hardware can be the difference between a successful trip and a roadside breakdown. This versatile jam nut is a universal staple in heavy-duty maintenance, acting as a direct replacement for highly searched industry numbers like Euclid E-1107, Dana 12052, and Mack 21AX220. Don't trust your safety to hardware store bolts—stick with the fleet-grade reliability of Automann.

Vehicle Fitment & Compatibility

This heavy-duty aftermarket jam nut features a universal design intended for the following commercial applications:

  • Make/Systems: Dana/Spicer, Reyco Granning, Standard Forge, Watson and Chalin, Hendrickson, and Mack
  • Component Group: Steering Linkage, Suspension Torque Rods, Axle Spindles
  • Thread Specification: 3/4"-16 UNF (Fine Thread)

Direct Replacement & Cross-Reference Numbers:

This Automann hardware serves as a direct exact-fit replacement for the following part numbers:

  • Euclid Interchange: E-1107, E1107
  • Dana/Spicer OEM: 12052
  • Mack OEM: 21AX220, 21AX56, 25089237
  • Hendrickson/Turner OEM: SA13008
  • Peterbilt OEM: 2309254008
  • Automann Distributor #: JNF340

Technical Specifications

  • Component Type: Low-Profile Jam Nut
  • Thread Size: 3/4 Inch
  • Thread Pitch: 16 (Fine Thread / UNF)
  • Nut Height: 7/16 Inch
  • Product Level: Fleet Standard Aftermarket
  • Brand: Automann (Distributed by FleetPro Parts & Tires)
Key features
  • Precision Locking Security: Specifically designed as a secondary "jam" nut to prevent primary fasteners from backing off under the intense vibrations of long-haul trucking.
  • Low-Profile 7/16" Design: The slim 7/16-inch height allows for secure installation in tight clearance areas, such as steering linkages and suspension rod ends.
  • Fine Thread Performance: Features 3/4"-16 fine threading for increased surface area contact and higher clamping force, ensuring your alignment stays locked in.
  • Heavy-Duty Zinc/Steel Finish: Manufactured from high-tensile steel to resist stripping and coated for corrosion resistance against road salt and moisture.
  • Universal Component Match: Acts as a seamless, high-quality replacement for a massive range of OEM hardware, including Mack, Peterbilt, Dana, and Hendrickson.
Specifications
Component Type
Low-Profile Jam Nut
Thread Size
3/4 in
Thread Pitch
16 (Fine Thread / UNF)
Nut Height
7/16 in
Weight
0.24 lbs
Package Dims
1 x 1 x 1 in
Product Level
Fleet Standard Aftermarket
Questions
Will this fit my truck?
This part fits Universal - Dana/Spicer, Reyco Granning, Standard Forge, Watson and Chalin, Hendrickson, and Mack Steering Linkage, Suspension Torque Rods, Axle Spindles. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Euclid E-1107, Dana/Spicer 12052, Dana 12052DANA, Mack 21AX220, Mack 21AX56, Mack 25089237, Hendrickson/Turner SA13008, Peterbilt 2309254008, Link 14752400, Reyco 8219758, Std. Forge 402101, Watson & Chalin 10025.
How fast does it ship?
In-stock orders placed before 12 PM Central on business days ship the same day from our Hanover Park, IL warehouse, and typically arrive in 2 to 5 business days anywhere in the USA.
What's your return policy?
Unused items in original packaging can be returned within 30 days, backed by our 30-day money-back guarantee. If we ship the wrong part, we cover the return label and send the correct one.