Jam Nuts

As of: Friday, July 11, 2025
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Jam Nut

Standard Features

  • Coarse or fine thread
  • Zinc-plated mild steel or stainless steel

Jam nuts are thin nuts that are assembled with regular nuts to lock both nuts in place. The jam nut helps prevent loosening by providing extra resistance.

Jam Nut Thread Size

 

Thread Size Part#
Mild Steel, Fine Thread
1/4-28 UNF 14639
3/8-24 UNF 14651
1/2-20 UNF 14664
3/4-16 UNF 14687
1-12 UNF 14702
1-14 UNF 14703
1 1/4-12 UNF 14708
1 1/2-12 UNF 14711
   
Thread Size Part#
Mild Steel, Coarse Thread
1/4-20 UNC 14636
3/8-16 UNC 14649
1/2-13 UNC 14661
5/8-11 UNC 14676
3/4-10 UNC 14686
1-8 UNC 14701
1-1/4-7 UNC 14707
   
Thread Size Part#
Stainless Steel, Fine Thread
1/4-28 UNF 14640
1/2-20 UNF 14665
3/4-16 UNF 14688
   
Thread Size Part#
Stainless Steel, Coarse Thread
3/8-16 UNC 14653
1/2-13 UNC 14662
5/8-11 UNC 14680
3/4-10 UNC 14690

 

 

Parts

Part # Description
Mild Steel, Fine Thread
14639 Nut,Jam 1/4-28NF HEX Steel Zinc Plated Width Across Flats=7/16 Thickness=5/32
14651 Nut,Jam 3/8-24NF HEX Steel Zinc Plated Width Across Flats=9/16 Thickness=7/32
14664 Nut,Jam 1/2-20NF HEX Steel Zinc Plated Width Across Flats=3/4 Thickness=5/16
14687 Nut,Jam 3/4-16NF HEX Steel Zinc Plated Width Across Flats=1-1/8 Thickness=27/64
14702 Nut,Jam 1-12NF HEX Steel Width Across Flats=1-1/2 Thickness=35/64 Clear Zinc Plated
14703 Nut,Jam 1-14UNS HEX Steel Zinc Plated Width Across Flats=1-1/2 Thickness=35/64
14708 Nut,Jam 1-1/4-12NF HEX Steel Zinc Plated Width Across Flats=1-7/8 Thickness=23/32
14711 Nut,Jam 1-1/2-12NF HEX Steel Zinc Plated Width Across Flats=2-1/4 Thickness=27/32
Mild Steel, Coarse Thread
14636 Nut,Jam 1/4-20NC HEX Steel Zinc Plated Width Across Flats=7/16 Thickness=5/32
14649 Nut,Jam 3/8-16NC HEX Steel Zinc Plated Width Across Flats=9/16 Thickness=7/32
14661 Nut, Jam, 1/2-13NC, Hex, Width Across Flats = 3/4, Thickness = 5/16, Steel Grade A, Zinc Plated
14676 Nut,Jam 5/8-11NC HEX Steel Clear Zinc Plated Width Across Flats=15/16 Thickness=3/8
14686 Nut,Jam 3/4-10NC HEX Steel Zinc Plated Width Across Flats=1-1/8 Thickness=27/64
14701 Nut,Jam 1-8NC HEX Steel Zinc Plated Width Across Flats=1-1/2 Thickness=35/64
14707 Nut,Jam 1-1/4-7NC HEX Steel Zinc Plated Width Across Flats=1-7/8 Thickness=23/32
Stainless Steel, Fine Thread
14640 Nut,Jam 1/4-28NF HEX SST Width Across Flats=7/16 Thickness=5/32
14665 Nut,Jam 1/2-20NF HEX 18-8 SST Width Across Flats=3/4 Thickness=5/16
14688 Nut,Jam 3/4-16NF HEX SST Width Across Flats=1-1/8 Thickness=27/64
Stainless Steel, Coarse Thread
14653 Nut,Jam 3/8-16NC HEX SST Width Across Flats=9/16 Thickness=7/32
14662 Nut,Jam 1/2-13NC HEX SST 18-8 Width Across Flats=3/4 Thickness=5/16
14680 Nut,Jam 5/8-11NC HEX Width Across Flats=15/16 Thickness=3/8 18-8 SST
14690 Nut,Jam 3/4-10NC HEX SST Width Across Flats=1-1/8 Thickness=27/64

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