S-91755A145 0.375" ID x 0.734" OD Self-Retaining Washers

Self-Retaining Washers

1288FA00024 Self-Retaining Washers
1288FA00024 Self-Retaining Washers

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

Part No.
Part No. 1288FA00024
Equivalent to mcmaster :
91755A145

Basic Information

System of Measurement Inch and Metric
Washer Type Self-Retaining

Dimension Parameters

ID 0.375"
OD 0.734"
Thickness 0.052-0.072"

Material & Strength Parameters

Material Nylon Plastic
Hardness Rockwell R120

Temperature & Environment Parameters

Temperature Range, °F Min. -40°
Temperature Range, °F Maximum 180°

Installation & Application Parameters

For Screw Size 1/4", M6

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Secure locking performance with self-retaining design that prevents loosening under vibration and movement
  • Excellent chemical and corrosion resistance due to high-quality nylon plastic construction
  • Wide temperature tolerance maintains integrity from -40°F to 180°F for demanding environments
  • Durable wear resistance with Rockwell R120 hardness for extended service life
  • Dual-standard compatibility fits both 1/4" and M6 screw sizes for versatile applications
  • Environmental compliance meets RoHS 3 standards for safe, regulated use
  • Precision dimensional control with 0.375" ID and 0.734" OD ensuring proper fit and function

Professional Applications & Engineering Value

This nylon self-retaining washer delivers critical vibration resistance in mechanical assemblies where traditional washers fail. The engineered plastic construction provides inherent electrical insulation and corrosion resistance, eliminating galvanic corrosion risks in mixed-material applications. With its self-retaining feature, installation efficiency improves significantly in automated or high-volume production environments. The broad temperature range from -40°F to 180°F ensures reliable performance in automotive, electronics, and outdoor equipment exposed to thermal cycling. Compatible with both 1/4" and M6 screw sizes, it simplifies inventory management for operations using multiple measurement systems while maintaining consistent locking performance across applications.

Specification Summary & Compliance

Precision manufactured to exacting dimensional standards with 0.375" internal diameter and 0.734" outer diameter. Designed for compatibility with 1/4" and M6 screw sizes in both inch and metric systems. Features Rockwell R120 hardness for consistent performance and meets RoHS 3 (2015/863/EU) compliance for environmental safety. Operating temperature range certified from -40°F to 180°F with thickness maintained between 0.052-0.072" for optimal compression and retention characteristics.

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