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Hex Bolts & Set Screws

Hex Bolts & Set Screws
Not sure what size or thread you have or need?
Two ways to confirm before you order - whichever you already know about your fastener.
1If you know the fastener diameter

Compare your fastener to our visual size guide to confirm size, pitch and length.

Open the identification guide ›

2If you have the spanner or socket

Match your spanner / socket AF (across-flats) to the size it fits - our reference chart covers every metric and imperial size we stock.

Open the spanner size chart ›

Hex bolts and set screws are the workhorses of the bolting world — the default fastener whenever you need to clamp two parts together with a spanner or socket. We stock over 2,900 variants spanning Metric M3 to M30, UNC/UNF 1/4" to 1-1/2", BSW and BSF imperial fine threads, in fully threaded set screws and part-threaded bolts.

The technical distinction between a hex bolt and a hex set screw is the threading — a set screw is threaded all the way to the head, while a bolt has a plain shank under the head with thread only on the lower portion. Both share the same hex head and spanner sizes.

MATERIALS AND FINISHES

Stainless Steel — A2-70 G304 for general external use, A4-70 G316 for marine and coastal environments. A4-80 G316 for high-tensile stainless applications. Brass and nylon for specialist work.

Zinc Silver Plated — Economical electroplated zinc, the most common finish on internal-use carbon steel hex bolts.

Galvanised — Hot-dip galvanised for outdoor and treated-timber work where a heavier coating is required.

Plain Black Uncoated — High-tensile bare-steel finish, typically Class 8.8 and 10.9 where the customer applies their own coating.

GRADES STOCKED

Metric: Class 4.6 (low tensile), Class 8.8 (workhorse high tensile), Class 10.9 (higher yield) and A2-70 / A4-70 / A4-80 stainless. Imperial: Grade 5, Grade 8 (high tensile), with stainless and zinc options across UNC and UNF.

Sizes: M3 through M30 metric (M10, M12 and M8 are the busiest); 1/4" through 1-1/2" imperial.

Thread systems: Metric Coarse (the majority), Metric Fine, UNC, UNF, BSW Coarse and BSF Fine.

Standards: AS1110.1, AS1110.2, AS1111, AS1112, AS2465-1999, DIN931, DIN933, ANSI B18.2.1, ISO 4014, ISO 4017.

All hex bolts pair naturally with our hex nuts, structural washers, flat washers and spring washers. Pre-drilled to clearance hole sizing; refer to our Technical PDF's Library for tightening torques and clearance hole charts.

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 bolt.

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Items 1-40 of 187

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    In stock

    M2.5 x 0.45p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
    M2.5 x 0.45p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
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    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
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    M3 x 0.50p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
    M3 x 0.50p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
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    M3 x 0.50p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
    M3 x 0.50p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
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    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
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    M4 x 0.70p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
    M4 x 0.70p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
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    M4 x 0.70p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
    M4 x 0.70p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
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    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
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    M5 x 0.80p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
    M5 x 0.80p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
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    M5 x 0.80p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.1
    M5 x 0.80p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.1
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    M5 x 0.80p Metric Coarse Brass Hex Set Screw / Hex Bolts DIN 933
    M5 x 0.80p Metric Coarse Brass Hex Set Screw / Hex Bolts DIN 933
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    M5 x 0.80p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
    M5 x 0.80p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
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    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Hex Bolts DIN 931
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Hex Bolts DIN 931
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    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
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    M6 x 1.00p Metric Coarse Stainless A4-70 G316 Hex Bolts DIN 931
    M6 x 1.00p Metric Coarse Stainless A4-70 G316 Hex Bolts DIN 931
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    M6 x 1.00p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
    M6 x 1.00p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
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    M6 x 1.00p Metric Coarse Bumax 88 Stainless A4-80 G316 Hex Bolts High Tensile ISO 4017
    M6 x 1.00p Metric Coarse Bumax 88 Stainless A4-80 G316 Hex Bolts High Tensile ISO 4017
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    M6 x 1.00p Metric Coarse Bumax 88 Stainless A4-80 G316 Hex Set Screw / Hex Bolts High Tensile ISO 4017
    M6 x 1.00p Metric Coarse Bumax 88 Stainless A4-80 G316 Hex Set Screw / Hex Bolts High Tensile ISO 4017
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    M6 x 1.00p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.1
    M6 x 1.00p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.1
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    M6 x 1.00p Metric Coarse Zinc Hex Bolts Class 8.8 High Tensile AS 1110.1
    M6 x 1.00p Metric Coarse Zinc Hex Bolts Class 8.8 High Tensile AS 1110.1
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    M6 x 1.00p Metric Coarse Zinc Hex Bolts Class 10.9 High Tensile AS 1110.1
    M6 x 1.00p Metric Coarse Zinc Hex Bolts Class 10.9 High Tensile AS 1110.1
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    M6 x 1.00p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 10.9 High Tensile AS 1110.1
    M6 x 1.00p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 10.9 High Tensile AS 1110.1
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    M6 x 1.00p Metric Coarse Galvanised Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.2
    M6 x 1.00p Metric Coarse Galvanised Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.2
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    M6 x 1.00p Metric Coarse Brass Hex Set Screw / Hex Bolts DIN 933
    M6 x 1.00p Metric Coarse Brass Hex Set Screw / Hex Bolts DIN 933
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    M6 x 1.00p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
    M6 x 1.00p Metric Coarse Nylon Hex Set Screw / Hex Bolts DIN 933
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    M6 x 1.00p Metric Coarse Galvanised Hex Bolts & Nuts Class 4.6 Low Tensile AS 1112
    M6 x 1.00p Metric Coarse Galvanised Hex Bolts & Nuts Class 4.6 Low Tensile AS 1112
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    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Hex Bolts DIN 931
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Hex Bolts DIN 931
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    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Hex Set Screw / Hex Bolts DIN 933
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    M8 x 1.25p Metric Coarse Stainless A4-70 G316 Hex Bolts DIN 931
    M8 x 1.25p Metric Coarse Stainless A4-70 G316 Hex Bolts DIN 931
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    M8 x 1.25p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
    M8 x 1.25p Metric Coarse Stainless A4-70 G316 Hex Set Screw / Hex Bolts DIN 933
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    M8 x 1.25p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.1
    M8 x 1.25p Metric Coarse Zinc Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.1
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    M8 x 1.25p Metric Coarse Zinc Hex Bolts Class 8.8 High Tensile AS 1110.1
    M8 x 1.25p Metric Coarse Zinc Hex Bolts Class 8.8 High Tensile AS 1110.1
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    M8 x 1.25p Metric Coarse Zinc Hex Bolts Class 10.9 High Tensile AS 1110.1
    M8 x 1.25p Metric Coarse Zinc Hex Bolts Class 10.9 High Tensile AS 1110.1
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    M8 x 1.25p Metric Coarse Zinc Hex Set Screws / Hex Bolts Class 10.9 High Tensile AS 1110.1
    M8 x 1.25p Metric Coarse Zinc Hex Set Screws / Hex Bolts Class 10.9 High Tensile AS 1110.1
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    M8 x 1.25p Metric Coarse Galvanised Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.2
    M8 x 1.25p Metric Coarse Galvanised Hex Set Screw / Hex Bolts Class 8.8 High Tensile AS 1110.2
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    M8 x 1.25p Metric Coarse Brass Hex Set Screw / Hex Bolts DIN 933
    M8 x 1.25p Metric Coarse Brass Hex Set Screw / Hex Bolts DIN 933
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Over 2,900 hex bolt and set screw variants - the workhorse fastener for clamping two parts together with a spanner on the head and a nut on the other side. Metric M3 to M30 plus UNC, UNF, BSW and BSF imperial threads, in Class 4.6, 8.8 and 10.9 carbon steel and A2-70 / A4-70 stainless.

TECHNICAL RESOURCES

Key charts and specification sheets: Imperial vs Metric Strength Chart · Bolts Markings · Hex Bolt Properties

For the full library, see our Technical PDF's Library.

Filter by :
Filter By
System of Measurement
  1. Metric 129 items
  2. Imperial 58 items
Size
  1. M2.5 (2.5mm) 1 item
  2. M3 (3mm) 3 items
  3. M4 (4mm) 4 items
  4. M5 (5mm) 6 items
  5. M6 (6mm) 15 items
  6. M7 (7mm) 1 item
  7. M8 (8mm) 15 items
  8. M10 (10mm) 15 items
  9. M12 (12mm) 18 items
  10. M14 (14mm) 9 items
  11. M16 (16mm) 14 items
  12. M18 (18mm) 7 items
  13. M20 (20mm) 11 items
  14. M24 (24mm) 10 items
  15. 3/16" (#10-24) 2 items
  16. #10-32 (3/16") 1 item
  17. 1/4" 9 items
  18. 5/16" 9 items
  19. 3/8" 9 items
  20. 7/16" 7 items
  21. 1/2" 11 items
  22. 9/16" 2 items
  23. 5/8" 2 items
  24. 3/4" 2 items
  25. 7/8" 1 item
  26. 1" 1 item
  27. 1-1/8" 1 item
  28. 1-1/4" 1 item
Size & Thread Pitch
  1. M2.5 x 0.45p Coarse 1 item
  2. M3 x 0.50p Coarse 3 items
  3. M4 x 0.70p Coarse 4 items
  4. M5 x 0.80p Coarse 6 items
  5. M6 x 1.00p Coarse 15 items
  6. M7 x 1.00p Coarse 1 item
  7. M8 x 1.00p Fine 2 items
  8. M8 x 1.25p Coarse 13 items
  9. M10 x 1.25p Fine 2 items
  10. M10 x 1.50p Coarse 13 items
  11. M12 x 1.25p Extra Fine 2 items
  12. M12 x 1.50p Fine 2 items
  13. M12 x 1.75p Coarse 14 items
  14. M14 x 1.50p Fine 2 items
  15. M14 x 2.00p Coarse 7 items
  16. M16 x 1.50p Fine 2 items
  17. M16 x 2.00p Coarse 12 items
  18. M18 x 1.50p Fine 2 items
  19. M18 x 2.50p Coarse 5 items
  20. M20 x 1.50p Fine 2 items
  21. M20 x 2.50p Coarse 9 items
  22. M24 x 1.50p Extra Fine 2 items
  23. M24 x 2.00p Fine 2 items
  24. M24 x 3.00p Coarse 6 items
  25. 3/16" (#10-24) x 24 TPI BSW 2 items
  26. #10-32 (3/16") x 32 TPI UNF 1 item
  27. 1/4" x 20 TPI UNC 5 items
  28. 1/4" x 26 TPI BSF 1 item
  29. 1/4" x 28 TPI UNF 3 items
  30. 5/16" x 18 TPI UNC 5 items
  31. 5/16" x 22 TPI BSF 1 item
  32. 5/16" x 24 TPI UNF 3 items
  33. 3/8" x 16 TPI UNC 5 items
  34. 3/8" x 20 TPI BSF 1 item
  35. 3/8" x 24 TPI UNF 3 items
  36. 7/16" x 14 TPI UNC 5 items
  37. 7/16" x 18 TPI BSF 1 item
  38. 7/16" x 20 TPI UNF 1 item
  39. 1/2" x 12 TPI BSW 2 items
  40. 1/2" x 13 TPI UNC 5 items
  41. 1/2" x 16 TPI BSF 1 item
  42. 1/2" x 20 TPI UNF 3 items
  43. 9/16" x 12 TPI UNC 1 item
  44. 9/16" x 18 TPI UNF 1 item
  45. 5/8" x 11 TPI UNC 1 item
  46. 5/8" x 18 TPI UNF 1 item
  47. 3/4" x 10 TPI UNC 1 item
  48. 3/4" x 16 TPI UNF 1 item
  49. 7/8" x 9 TPI UNC 1 item
  50. 1" x 8 TPI UNC 1 item
  51. 1-1/8" x 7 TPI UNC 1 item
  52. 1-1/4" x 7 TPI UNC 1 item
Thread Type
  1. Metric - Coarse 103 items
  2. Metric Coarse - Left Hand Thread 6 items
  3. Metric - Fine 20 items
  4. UNC / BSW - Coarse 34 items
  5. BSW - Coarse 2 items
  6. UNF - Fine 17 items
  7. BSF - Fine 5 items
Length
  1. 4mm 1 item
  2. 5mm 1 item
  3. 6mm 7 items
  4. 8mm 7 items
  5. 10mm 19 items
  6. 12mm 29 items
  7. 16mm 46 items
  8. 20mm 72 items
  9. 25mm 87 items
  10. 30mm 97 items
  11. 35mm 81 items
  12. 40mm 114 items
  13. 45mm 79 items
  14. 50mm 113 items
  15. 55mm 48 items
  16. 60mm 91 items
  17. 65mm 70 items
  18. 70mm 80 items
  19. 75mm 78 items
  20. 80mm 75 items
  21. 85mm 9 items
  22. 90mm 76 items
  23. 100mm 90 items
  24. 110mm 57 items
  25. 120mm 67 items
  26. 130mm 59 items
  27. 140mm 51 items
  28. 150mm 63 items
  29. 160mm 26 items
  30. 170mm 18 items
  31. 180mm 27 items
  32. 190mm 11 items
  33. 200mm 29 items
  34. 210mm 4 items
  35. 220mm 16 items
  36. 230mm 2 items
  37. 240mm 12 items
  38. 250mm 10 items
  39. 260mm 11 items
  40. 270mm 3 items
  41. 280mm 11 items
  42. 290mm 3 items
  43. 300mm 12 items
  44. 325mm 2 items
  45. 350mm 3 items
  46. 375mm 3 items
  47. 400mm 3 items
  48. 3/8" 2 items
  49. 1/2" 24 items
  50. 5/8" 17 items
  51. 3/4" 35 items
  52. 1" 50 items
  53. 1-1/4" 51 items
  54. 1-1/2" 51 items
  55. 1-3/4" 25 items
  56. 2" 49 items
  57. 2-1/4" 2 items
  58. 2-1/2" 44 items
  59. 3" 45 items
  60. 3-1/2" 32 items
  61. 4" 39 items
  62. 4-1/2" 27 items
  63. 5" 28 items
  64. 5-1/2" 17 items
  65. 6" 24 items
  66. 6-1/2" 1 item
  67. 7" 9 items
  68. 8" 10 items
  69. 9" 6 items
  70. 10" 6 items
  71. 11" 1 item
  72. 12" 1 item
Material / Finish
  1. Brass 5 items
  2. Galvanised 16 items
  3. Nylon 8 items
  4. Plain Black Uncoated 2 items
  5. Stainless Steel 81 items
  6. Zinc Silver Plated 75 items
Class / Grade
  1. A2-70 G304 45 items
  2. A4-70 G316 34 items
  3. High Tensile A4-80 G316 2 items
  4. Low Tensile Class 4.6 18 items
  5. High Tensile Grade 5 5 items
  6. High Tensile Grade 8 20 items
  7. High Tensile Class 8.8 50 items
  8. High Tensile Class 10.9 13 items
Corrosion Protection Level
  1. Ultimate 41 items
  2. Excellent 69 items
  3. Moderate 75 items
  4. Low 2 items
Part or Full Thread
  1. Full Thread (FT) 129 items
  2. Part Thread (PT) 91 items
Head Height Range Guide
  1. 1.55 - 1.85mm 1 item
  2. 1.85 - 2.15mm 3 items
  3. 2.40 - 3.10mm 7 items
  4. 3.35 - 3.65mm 6 items
  5. 3.65 - 4.20mm 23 items
  6. 4.20 - 4.60mm 1 item
  7. 4.60 - 4.90mm 1 item
  8. 4.90 - 5.70mm 24 items
  9. 5.70 - 6.90mm 24 items
  10. 6.90 - 8.25mm 32 items
  11. 7.80 - 8.30mm 1 item
  12. 8.70 - 9.45mm 14 items
  13. 9.45 - 10.80mm 15 items
  14. 10.00 - 10.80mm 1 item
  15. 11.25 - 12.80mm 19 items
  16. 12.80 - 13.80mm 1 item
  17. 13.40 - 14.30mm 1 item
  18. 14.70 - 15.25mm 9 items
  19. 15.00 - 16.00mm 2 items
  20. 16.70 - 18.30mm 1 item
  21. 19.00 - 20.70mm 1 item
Spanner Size
  1. 5mm 1 item
  2. 5.5mm 3 items
  3. 7mm 4 items
  4. 5/16" 3 items
  5. 8mm 6 items
  6. 10mm 15 items
  7. 11mm 1 item
  8. 7/16" 9 items
  9. 1/2" 8 items
  10. 13mm 15 items
  11. 17/32" 1 item
  12. 9/16" 8 items
  13. 19/32" 1 item
  14. 5/8" 6 items
  15. 16mm 8 items
  16. 17mm 7 items
  17. 45/64" 1 item
  18. 18mm 10 items
  19. 19mm 7 items
  20. 3/4" 8 items
  21. 13/16" 5 items
  22. 21mm 7 items
  23. 22mm 3 items
  24. 15/16" 2 items
  25. 24mm 13 items
  26. 27mm 8 items
  27. 1-1/8" 2 items
  28. 30mm 10 items
  29. 32mm 1 item
  30. 1-5/16" 1 item
  31. 36mm 9 items
  32. 1-1/2" 1 item
  33. 41mm 1 item
  34. 1-11/16" 1 item
  35. 1-7/8" 1 item
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