Description
07534800 Clamping Knob .312-18 Nyloc (Genuine OEM Part)
The 07534800 Knob-Clamping (.312-18 Nyloc) is a genuine OEM fastening component used across a wide range of commercial and residential zero-turn mowers, bagger systems, and deck assemblies. Designed for secure hand-tightened clamping, this knob provides reliable retention while allowing quick removal for service and adjustments.
Featuring a .312-18 thread size with integrated nyloc locking feature, this knob resists vibration loosening and ensures consistent holding power in high-vibration mowing environments. It is commonly used on hood assemblies, belt covers, chute assemblies, bagger mounts, and seat supports.
Built to OEM specifications, Part 07534800 ensures precise fitment, proper thread engagement, and long-term durability compared to generic hardware substitutes.
Key Details:
Manufacturer: Ariens / Gravely (Genuine OEM)
Part Number: 07534800
Part Type: Clamping Knob with Nyloc Insert
Thread Size: .312-18
Function: Secures covers, hoods, seats, and mounting assemblies
Feature: Integrated nylon locking insert to prevent loosening
Installation: Direct OEM replacement
Compatibility
The 07534800 clamping knob is used on numerous Ariens and Gravely models and attachments, including:
Zero-Turn & Commercial Mowers
- Gravely Pro-Turn Series
- Gravely ZT HD Series
- Gravely Compact-Pro 34
- Gravely Pro-Master Series
- Gravely Rapid XZ Series
- Gravely ZT XL Series
Bagger & Collection Systems
- 2-Bag and 3-Bag Bagger Assemblies
- Grass Collection Systems (200 Series)
- Pro-Turn Rear Bagger Systems
- HD Three-Bag Bagger
Deck & Belt Cover Applications
- 44", 48", 52", 60", 66", and 72" deck belt covers
- Discharge chute storage assemblies
- Anti-scalp wheel and roller brackets
- Blower mounting assemblies
Walk-Behind & Push Mowers
- Pro21XD Series
- DSP21 / DESP21 Series
Because this knob is used across multiple serial number ranges and deck configurations, always verify model and serial number for exact fitment.
Who Is This For?
- Professional landscapers maintaining commercial Gravely equipment
- Property owners servicing zero-turn mower deck covers
- Technicians replacing worn or missing clamping hardware
- Operators repairing bagger or chute assemblies
Property Size (Recommended Equipment Use)
Commonly found on equipment servicing:
- Residential properties (1–3 acres)
- Large estates (3–10 acres)
- Commercial landscaping operations
Pros / Cons
Pros:
- OEM precision threading
- Nyloc insert prevents vibration loosening
- Tool-free removal and installation
- Heavy-duty molded construction
Cons:
- Must confirm correct thread size (.312-18) before ordering
- Plastic knob can wear over extended heavy use
OEM vs Aftermarket Comparison
OEM 07534800 Knob:
Exact thread engagement, proper material strength, reliable locking insert, long service life.
Aftermarket Knobs:
Thread tolerance may vary, lower-grade nylon inserts, potential premature loosening.
Using genuine OEM hardware ensures correct fit and dependable performance across deck, chute, and seat assemblies.
