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Nyloc Insert Nut

Nyloc Insert Nut
Not sure what nut you have?
Two ways to identify it - whichever is easier with what is in front of you.
1If you have the nut

Find the spanner that fits it snugly, then measure the hole. Our nut identification chart lists every metric and imperial nut we stock side by side, sorted by spanner size.

Open the nut identification chart ›

2If you have its bolt

The fastest check is the male thread: the right nut spins onto its bolt by hand with no force. Identify the bolt size and pitch first with our bolt and screw guide, and the nut follows.

Open the bolt and screw guide ›

MATERIALS AND FINISHES

Available finishes: Stainless Steel, Zinc Silver Plated, Galvanised, Zinc Yellow Plated.

GRADES, SIZES AND THREADS

Grades stocked: A2-70 G304, High Tensile Class 8, A4-70 G316, High Tensile Grade 5, High Tensile Class 6.

Sizes: M10 (10mm), M12 (12mm), 1/2", M8 (8mm), M16 (16mm), M20 (20mm), M14 (14mm), M24 (24mm).

Thread systems: Metric - Coarse, UNC / BSW - Coarse, UNF - Fine, Metric - Fine, BSF - Fine, BSW - Coarse.

STANDARDS

DIN 985, IFI-100NE, NM Series, NE Series, BS 1083:1965.

These nyloc insert nuts pair with our bolts, washers and threaded rod. See our Technical Resources page for tightening torques and spec PDFs.

WHY AUSTRALIA TRUSTS BOLT & NUT

With 15+ years selling fasteners online from Brisbane, we hold over 25,000 stock lines and 200 million pieces — 98.75% of online orders placed before 1pm leave same day. Save more as you buy more — we offer up to 13 price breaks plus 3 spend-tier discounts. Read our customer reviews or get in touch if you need help picking the right product.

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Hex Nyloc insert nuts have a hexagonal carbon-steel or stainless body and a nylon ring locked into the top of the nut. As the thread engages the nylon, friction stops the nut backing off under vibration — the standard locking nut for automotive, plant, equipment and assemblies that move. We stock 216+ variants across the nyloc insert nut range.

TECHNICAL RESOURCES

Need help identifying your nut? See our guide to identifying the size of your nut.

Key charts and specification sheets: Specs - Neptune 8.8 Nyloc Nut Metric Coarse Stainless G316 DIN985 · Specs - Nyloc Nut BSF Fine Zinc Silver BS 1083 1965

For full sizing data and standards, see our Technical PDFs library.

Filter by :
Filter By
Category
System of Measurement
  1. Metric 153 items
  2. Imperial 101 items
Size
  1. M2 (2mm) 2 items
  2. M2.5 (2.5mm) 3 items
  3. M3 (3mm) 4 items
  4. M4 (4mm) 5 items
  5. M5 (5mm) 6 items
  6. M6 (6mm) 9 items
  7. M8 (8mm) 12 items
  8. M10 (10mm) 15 items
  9. M12 (12mm) 16 items
  10. M14 (14mm) 9 items
  11. M16 (16mm) 13 items
  12. M18 (18mm) 7 items
  13. M20 (20mm) 12 items
  14. M22 (22mm) 4 items
  15. M24 (24mm) 11 items
  16. M27 (27mm) 3 items
  17. M30 (30mm) 8 items
  18. M33 (33mm) 2 items
  19. M36 (36mm) 5 items
  20. M42 (42mm) 2 items
  21. M48 (48mm) 2 items
  22. M56 (56mm) 1 item
  23. M64 (64mm) 2 items
  24. #2-56 1 item
  25. #3-48 1 item
  26. #4-40 1 item
  27. #5-40 1 item
  28. #6-32 1 item
  29. #8-32 1 item
  30. 3/16" (#10-24) 2 items
  31. #10-24 (3/16") 2 items
  32. #10-32 (3/16") 2 items
  33. 1/4" 10 items
  34. 5/16" 9 items
  35. 3/8" 11 items
  36. 7/16" 8 items
  37. 1/2" 14 items
  38. 9/16" 2 items
  39. 5/8" 6 items
  40. 3/4" 6 items
  41. 7/8" 5 items
  42. 1" 6 items
  43. 1-1/8" 3 items
  44. 1-1/4" 3 items
  45. 1-3/8" 1 item
  46. 1-1/2" 2 items
  47. 1-3/4" 1 item
  48. 2" 2 items
Size & Thread Pitch
  1. M2 x 0.40p Coarse 2 items
  2. M2.5 x 0.45p Coarse 3 items
  3. M3 x 0.50p Coarse 4 items
  4. M4 x 0.70p Coarse 5 items
  5. M5 x 0.80p Coarse 6 items
  6. M6 x 1.00p Coarse 9 items
  7. M8 x 1.00p Fine 3 items
  8. M8 x 1.25p Coarse 9 items
  9. M10 x 1.00p Extra Fine 3 items
  10. M10 x 1.25p Fine 2 items
  11. M10 x 1.50p Coarse 10 items
  12. M12 x 1.25p Extra Fine 2 items
  13. M12 x 1.50p Fine 3 items
  14. M12 x 1.75p Coarse 11 items
  15. M14 x 1.50p Fine 2 items
  16. M14 x 2.00p Coarse 7 items
  17. M16 x 1.50p Fine 3 items
  18. M16 x 2.00p Coarse 10 items
  19. M18 x 1.50p Fine 2 items
  20. M18 x 2.50p Coarse 5 items
  21. M20 x 1.50p Fine 3 items
  22. M20 x 2.50p Coarse 9 items
  23. M22 x 1.50p Fine 2 items
  24. M22 x 2.50p Coarse 2 items
  25. M24 x 2.00p Fine 3 items
  26. M24 x 3.00p Coarse 8 items
  27. M27 x 3.00p Coarse 3 items
  28. M30 x 1.50p Extra Fine 1 item
  29. M30 x 2.00p Fine 1 item
  30. M30 x 3.50p Coarse 6 items
  31. M33 x 3.50p Coarse 2 items
  32. M36 x 3.00p Fine 1 item
  33. M36 x 4.00p Coarse 4 items
  34. M42 x 4.50p Coarse 2 items
  35. M48 x 5.00p Coarse 2 items
  36. M56 x 5.50p Coarse 1 item
  37. M64 x 6.00p Coarse 2 items
  38. #2-56 TPI UNC 1 item
  39. #3-48 TPI UNC 1 item
  40. #4-40 TPI UNC 1 item
  41. #5-40 TPI UNC 1 item
  42. #6-32 TPI UNC 1 item
  43. #8-32 TPI UNC 1 item
  44. 3/16" (#10-24) x 24 TPI BSW 1 item
  45. #10-24 (3/16") x 24 TPI UNC 2 items
  46. 3/16" (#10-24) x 24 TPI UNC 1 item
  47. #10-32 (3/16") x 32 TPI UNF 2 items
  48. 1/4" x 20 TPI UNC 5 items
  49. 1/4" x 26 TPI BSF 1 item
  50. 1/4" x 28 TPI UNF 4 items
  51. 5/16" x 18 TPI UNC 5 items
  52. 5/16" x 22 TPI BSF 1 item
  53. 5/16" x 24 TPI UNF 3 items
  54. 3/8" x 16 TPI UNC 5 items
  55. 3/8" x 20 TPI BSF 1 item
  56. 3/8" x 24 TPI UNF 5 items
  57. 7/16" x 14 TPI UNC 4 items
  58. 7/16" x 18 TPI BSF 1 item
  59. 7/16" x 20 TPI UNF 3 items
  60. 1/2" x 12 TPI BSW 3 items
  61. 1/2" x 13 TPI UNC 5 items
  62. 1/2" x 16 TPI BSF 1 item
  63. 1/2" x 20 TPI UNF 5 items
  64. 9/16" x 12 TPI UNC 1 item
  65. 9/16" x 18 TPI UNF 1 item
  66. 5/8" x 11 TPI UNC 3 items
  67. 5/8" x 18 TPI UNF 3 items
  68. 3/4" x 10 TPI UNC 3 items
  69. 3/4" x 16 TPI UNF 3 items
  70. 7/8" x 9 TPI UNC 3 items
  71. 7/8" x 14 TPI UNF 2 items
  72. 1" x 8 TPI UNC 3 items
  73. 1" x 12 TPI UNF 3 items
  74. 1-1/8" x 7 TPI UNC 2 items
  75. 1-1/8" x 12 TPI UNF 1 item
  76. 1-1/4" x 7 TPI UNC 2 items
  77. 1-1/4" x 12 TPI UNF 1 item
  78. 1-3/8" x 12 TPI UNF 1 item
  79. 1-1/2" x 6 TPI UNC 1 item
  80. 1-1/2" x 12 TPI UNF 1 item
  81. 1-3/4" x 12 TPI UNF 1 item
  82. 2" x 4.5 TPI UNC 1 item
  83. 2" x 12 TPI UNF 1 item
Material / Finish
  1. Galvanised 17 items
  2. Stainless Steel 110 items
  3. Zinc Silver Plated 105 items
  4. Zinc Yellow Plated 22 items
Class / Grade
  1. A2-70 G304 63 items
  2. A4-70 G316 37 items
  3. High Tensile A4-80 G316 10 items
  4. Low Tensile Grade 2 4 items
  5. Low Tensile Class 4 7 items
  6. High Tensile Grade 5 35 items
  7. High Tensile Class 6 18 items
  8. High Tensile Class 8 50 items
  9. High Tensile Grade 8 9 items
  10. High Tensile Class 10 21 items
Corrosion Protection Level
  1. Ultimate 47 items
  2. Excellent 80 items
  3. Moderate 127 items
Serrations under Head
  1. No 20 items
Overall Nut Height Range Guide
  1. 2.40 - 2.90mm 1 item
  2. 2.90 - 3.20mm 1 item
  3. 3.30 - 4.00mm 10 items
  4. 4.30 - 4.70mm 1 item
  5. 4.70 - 5.50mm 11 items
  6. 5.60 - 7.15mm 21 items
  7. 7.55 - 9.10mm 29 items
  8. 9.50 - 10.30mm 14 items
  9. 10.30 - 11.10mm 4 items
  10. 11.10 - 12.00mm 25 items
  11. 12.00 - 12.99mm 2 items
  12. 13.30 - 14.00mm 13 items
  13. 14.10 - 14.70mm 1 item
  14. 14.70 - 16.00mm 21 items
  15. 16.00 - 16.70mm 4 items
  16. 16.70 - 17.50mm 1 item
  17. 17.66 - 18.50mm 8 items
  18. 18.66 - 20.00mm 18 items
  19. 20.70 - 22.60mm 11 items
  20. 23.15 - 25.40mm 15 items
  21. 25.70 - 27.40mm 9 items
  22. 28.70 - 30.60mm 12 items
  23. 31.40 - 36.00mm 9 items
  24. 38.00 - 40.00mm 1 item
  25. 40.00 - 44.00mm 4 items
  26. 46.00 - 49.00mm 2 items
  27. 54.00 - 56.00mm 1 item
  28. 57.00 - 59.00mm 1 item
  29. 60.00 - 65.00mm 4 items
Spanner Size
  1. 4mm 1 item
  2. 5mm 4 items
  3. 5.5mm 4 items
  4. 1/4" 4 items
  5. 7mm 5 items
  6. 5/16" 2 items
  7. 8mm 6 items
  8. 11/32" 1 item
  9. 3/8" 5 items
  10. 10mm 9 items
  11. 7/16" 10 items
  12. 1/2" 8 items
  13. 13mm 12 items
  14. 9/16" 11 items
  15. 15mm 2 items
  16. 5/8" 7 items
  17. 17mm 13 items
  18. 11/16" 2 items
  19. 18mm 3 items
  20. 19mm 13 items
  21. 3/4" 12 items
  22. 21mm 1 item
  23. 22mm 8 items
  24. 7/8" 4 items
  25. 15/16" 6 items
  26. 24mm 13 items
  27. 27mm 7 items
  28. 1-1/8" 6 items
  29. 30mm 12 items
  30. 32mm 4 items
  31. 1-5/16" 5 items
  32. 36mm 11 items
  33. 1-1/2" 6 items
  34. 41mm 3 items
  35. 1-5/8" 1 item
  36. 1-11/16" 2 items
  37. 46mm 8 items
  38. 1-7/8" 3 items
  39. 50mm 2 items
  40. 2-1/16" 1 item
  41. 55mm 5 items
  42. 2-1/4" 2 items
  43. 65mm 2 items
  44. 2-3/4" 1 item
  45. 75mm 2 items
  46. 3-1/8" 2 items
  47. 85mm 1 item
  48. 95mm 2 items
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