S-93298A120 5/16"-18 Flange Nuts

Flange Nuts

1220FA00006 Flange Nuts
1220FA00006 Flange Nuts

Image may differ from product. See technical specification for details.

Part No.
Part No. 1220FA00006
Equivalent to mcmaster :
93298A120

Basic Information

System of Measurement Inch
Nut Type Flange, Locknut, Hex

Dimension Parameters

Width 1/2"
Height 11/32"

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Flange Parameters

Flange Diameter 0.68"
Flange Thickness 0.05"

Material & Strength Parameters

Material Zinc-Plated Steel
Strength Class Grade F

Temperature & Environment Parameters

Insert Maximum Temperature 250°F

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
Locking Type Nylon Insert
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior vibration resistance through the nylon insert that maintains locking force under dynamic loads
  • Enhanced load distribution with the integrated 0.68" flange that prevents surface damage and loosening
  • High-temperature performance with nylon insert rated for continuous service up to 250°F (121°C)
  • Corrosion protection provided by zinc plating on steel construction for extended service life
  • Easy installation and removal with standard external hex drive compatible with common tools
  • Reliable thread engagement through Class 2B UNC coarse threads ensuring consistent fastening
  • Industrial-grade strength meeting Grade F specifications for demanding applications

Professional Applications & Engineering Value

This zinc-plated steel flange lock nut combines multiple engineering solutions for industrial fastening challenges. The nylon insert creates consistent friction against mating threads, effectively resisting vibration-induced loosening in machinery, automotive, and equipment applications. The integrated flange design eliminates the need for separate washers while distributing clamp load over a wider surface area, preventing damage to connected materials. With UNC coarse threads and Class 2B thread fit, this nut provides reliable engagement even in environments with minor contamination or debris. The external hex drive ensures compatibility with standard wrenches and sockets, streamlining assembly processes while the zinc plating offers corrosion resistance for extended service life in various operating conditions.

Specification Summary & Compliance

This flange lock nut features 5/16"-18 UNC coarse threads with Class 2B thread fit for consistent engagement. The nut meets Grade F strength requirements and incorporates a nylon insert rated for temperatures up to 250°F. The flange measures 0.68" in diameter with a 0.05" thickness for optimal load distribution. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring suitability for industrial applications with strict compliance requirements.

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