S-94238A141 1/4"-20 Flange Nuts

Flange Nuts

1224FA00009 Flange Nuts
1224FA00009 Flange Nuts

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

Part No.
Part No. 1224FA00009
Equivalent to mcmaster :
94238A141

Basic Information

System of Measurement Inch
Nut Type Flange, Locknut, Hex

Dimension Parameters

Width 7/16"
Height 21/64"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
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 0.54"
Flange Thickness 0.08"

Material & Strength Parameters

Material Black-Oxide 18-8 Stainless Steel

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 nylon insert locking technology, preventing loosening in high-motion applications
  • Enhanced corrosion protection with black-oxide coated 18-8 stainless steel construction for extended service life
  • Integrated flange design with 0.54" diameter distributes load evenly, eliminating need for separate washers
  • High-temperature capability withstands up to 250°F while maintaining locking performance
  • Reliable coarse threading with UNC 1/4"-20 pattern and Class 2B fit ensures smooth installation and secure fastening
  • External hex drive provides standard tool compatibility for efficient installation and removal
  • Regulatory compliance meets RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

This nylon insert lock flange nut combines multiple engineering solutions for demanding industrial environments. The black-oxide 18-8 stainless steel construction provides excellent corrosion resistance while the integrated 0.54" flange eliminates washer requirements and distributes clamping force over a wider surface area. The UNC coarse threading with Class 2B fit ensures reliable engagement even in applications where vibration or thermal cycling would compromise standard fasteners. The nylon insert locking mechanism maintains consistent tension up to 250°F, making these flange nuts ideal for automotive assemblies, machinery frames, electrical enclosures, and structural applications where vibration resistance and environmental durability are critical.

Specification Summary & Compliance

This heavy-duty fastener features 1/4"-20 UNC coarse threading with Class 2B thread fit for precision engagement. The external hex drive (7/16" width) ensures standard tool compatibility, while the 0.54" flange diameter and 0.08" thickness provide optimal load distribution. Manufactured from 18-8 stainless steel with black-oxide surface treatment, the nut delivers both corrosion resistance and reduced galling. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.

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