S-94645A320 M27 DIN 985, ISO 10511 Locknuts

Locknuts

1139FA00020 Locknuts
1139FA00020 Locknuts

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

Part No.
Part No. 1139FA00020
Equivalent to mcmaster :
94645A320

Basic Information

System of Measurement Metric
Nut Type Locknut, Hex
Specifications Met DIN 985, ISO 10511

Dimension Parameters

Width 41 mm
Height 27 mm

Thread Parameters

Thread Type Metric
Thread Size M27
Thread Direction Right Hand
Thread Pitch 3 mm
Thread Spacing Coarse
Thread Fit Class 6H

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Material & Strength Parameters

Material Zinc-Plated Steel
Strength Class Class 10

Temperature & Environment Parameters

Insert Maximum Temperature 220°F

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) 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

  • Exceptional vibration resistance through precision-molded nylon insert, preventing loosening under dynamic loads for reliable assembly integrity.
  • Heavy-duty Class 10 strength rating ensures high clamp load retention and mechanical stability in demanding industrial applications.
  • Zinc-plated steel construction provides durable corrosion protection, extending service life in harsh environments.
  • Temperature resilience up to 220°F allows consistent locking performance in elevated temperature operating conditions.
  • Standardized coarse metric thread (M27x3mm) with Class 6H fit enables quick installation and secure mating with compatible bolts.
  • External hex drive design facilitates easy wrenching and high torque application with standard tools.
  • Compliance with DIN 985 and ISO 10511 standards guarantees dimensional accuracy, interchangeability, and quality assurance.

Professional Applications & Engineering Value

This M27 nylon insert locknut delivers critical vibration-proof security for heavy machinery, automotive assemblies, and structural frameworks where dynamic loads and thermal cycling threaten joint integrity. The zinc-plated steel body resists environmental corrosion while the non-metallic nylon insert creates consistent elastic locking force, eliminating the need for secondary locking devices. Engineered with coarse metric threads and Class 6H tolerance, it maintains precise thread engagement even after repeated disassembly cycles. The external hex drive accommodates high torque values during installation, making it ideal for industrial maintenance and production lines requiring reliable fastening solutions.

Specification Summary & Compliance

Manufactured to DIN 985 and ISO 10511 specifications with Class 6H thread fit and Class 10 strength rating. Features M27x3mm coarse metric right-hand threads, 41mm width across flats, and 27mm height. Compliant with RoHS 3 (2015/863/EU) environmental standards.

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