Jam Nuts

As of: Tuesday, July 28, 2026

Standard Features

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

WARNING: Cancer and Reproductive Harm California Proposition 65

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

Mild Steel, Fine Thread

Part #	Description	List Price
14639	Steel Zinc Plated Width Across Flats=7/16 Thickness=5/32	List Price: $1.00
14651	Steel Zinc Plated Width Across Flats=9/16 Thickness=7/32	List Price: $1.00
14664	Steel Zinc Plated Width Across Flats=3/4 Thickness=5/16	List Price: $1.60
14687	Steel Zinc Plated Width Across Flats=1-1/8 Thickness=27/64	List Price: $1.60
14702	Width Across Flats=1-1/2 Thickness=35/64 Clear Zinc Plated	List Price: $5.99
14703	Zinc Plated Width Across Flats=1-1/2 Thickness=35/64	List Price: $4.90
14708	Steel Zinc Plated Width Across Flats=1-7/8 Thickness=23/32	List Price: $3.60
14711	Steel Zinc Plated Width Across Flats=2-1/4 Thickness=27/32	List Price: $4.90

Mild Steel, Coarse Thread

Part #	Description	List Price
14636	Steel Zinc Plated Width Across Flats=7/16 Thickness=5/32	List Price: $1.00
14649	Steel Zinc Plated Width Across Flats=9/16 Thickness=7/32	List Price: $2.25
14661	Width Across Flats = 3/4, Thickness = 5/16, Steel Grade A, Zinc Plated	List Price: $1.00
14676	Steel Clear Zinc Plated Width Across Flats=15/16 Thickness=3/8	List Price: $4.00
14686	Steel Zinc Plated Width Across Flats=1-1/8 Thickness=27/64	List Price: $1.06
14701	Zinc Plated Width Across Flats=1-1/2 Thickness=35/64	List Price: $1.20
14707	Steel Zinc Plated Width Across Flats=1-7/8 Thickness=23/32	List Price: $3.30

Stainless Steel, Fine Thread

Part #	Description	List Price
14640	Width Across Flats=7/16 Thickness=5/32	List Price: $1.30
14665	SST Width Across Flats=3/4 Thickness=5/16	List Price: $1.95
14688	Width Across Flats=1-1/8 Thickness=27/64	List Price: $2.30

Stainless Steel, Coarse Thread

Part #	Description	List Price
14653	Width Across Flats=9/16 Thickness=7/32	List Price: $2.10
14662	18-8 Width Across Flats=3/4 Thickness=5/16	List Price: $1.85
14680	Width Across Flats=15/16 Thickness=3/8 18-8 SST	List Price: $2.10
14690	Width Across Flats=1-1/8 Thickness=27/64	List Price: $2.25

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