5/16-18 UNC Imperial Hexagon Nylon Locking Nuts - Stainless Steel (A2)


Key Features

  • 3 Year Extended Warranty.
  • Free Technical Support From Our Engineers.
  • A2 Stainless Steel, also known as 18-8 or 304 Stainless Steel.
  • Thread Size: 5/16-18 UNC
  • Nut Width A/F (J) [Max]: 0.502 inch
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5/16-18 UNC Imperial Hexagon Nylon Locking Nuts - Stainless Steel (A2) Technical Specification

5/16-18 UNC Imperial Hexagon Nylon Locking Nuts - Stainless Steel (A2) Drawing
General Tolerance+/- 0.13mm
Hexagon Height (T) [Min]0.250 inch
Insert MaterialNylon
Manufacturing StandardDIN 985
MaterialStainless Steel (A2)
Material SpecificationStainless Steel (A2)
Metric or Imperial?Imperial
Nut Width A/F (J) [Max]0.502 inch
Screw Thread Pitch18 TPI
Thread Size5/16-18 UNC
Total Thickness (L) [Max]0.359 inch

Product Certifications

Certificate of Conformity Included
Certificate of Conformity Included
RoHS Certified
RoHS Certified
REACH Certified
REACH Certified
Quality Approved

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5/16-18 UNC Imperial Hexagon Nylon Locking Nuts - Stainless Steel (A2) Description

The 5/16-18 UNC Imperial Hexagon Nylon Locking Nuts - Stainless Steel (A2) has the following features:

  • DIN 985 Manufacturing Standard
  • Nylon Insert Material
  • Stainless Steel (A2) Material
  • Stainless Steel (A2) Material Specification
  • 18 TPI Screw Thread Pitch
  • Natural Finish
  • +/- 0.13mm General Tolerance
  • Imperial Metric or Imperial?
  • 5/16-18 UNC Thread Size
  • 0.359 inch Total Thickness (L) [Max]
  • 0.502 inch Nut Width A/F (J) [Max]
  • 0.250 inch Hexagon Height (T) [Min]

Discover more about the Imperial Hexagon Nylon Locking Nuts range.

Imperial Nyloc Nuts, also known commonly as Nylon Insert Nuts, are a type of prevailing torque nut. Nylon Locknuts feature a polymer insert, designed to fit tightly around the threads of the fastener to prevent self loosening.

Imperial Nylon Locking Nuts are a good low cost solution for applications where unwanted vibrations can cause fasteners to loosen over time. The tight grip of the nylon insert around the threaded fastener can also help to prevent spillage or leakage of fluids.

Accu also supplies Imperial Thin Nylon Locking Nuts for applications where installation space is more limited.


The metal element of this type of locking nut is manufactured from Stainless Steel, with grades A2 and A4 both available as standard.

Imperial Nylon Locking Nut Sizes

Imperial Nylon Insert Nuts from Accu are available in thread sizes No.2 to 1”.

For metric options, please see our Metric Nylon Locking Nuts.

Shipping Information

Shipping Destinations:Worldwide.
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Weight Band (100 items):Between 0.5kg and 1kg. Add to cart to calculate exact weights.

Component History

Product First Available:Sunday, June 28, 2015
Stock Last Updated:05:56 am
Monday, January 24, 2022
Specification Last Updated:Monday, January 24, 2022

APC / Barcodes

APC (Accu Product Code):HNN-5/16-18-A2
EAN13 (International Article No.):5054328187672
ASIN (Amazon Stock Identification No.):ASIN not defined.