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18-8 Stainless Steel Coupling Nuts

  • A Coupling Nut is Used Where you Want to Fasten 2 Male Threads Together, Either to Increase Length or Fine Adjustments of the Fastener.
  • Our Extention Nuts are Made From 18-8 Grade Stainless Steel.
  • Hex Coupling Nuts Can be Driven With a Wrench, and are the Choice for Most Marine, Industrial, Construction and OEM Applications Where Corrosion Resistance is a Primary Factor.
  • 18-8 Stainless Steel Includes 303 & 304 Grades.
  • Standard IFI-128.


Item # Image Description Price
NHCOUP8-32
8-32 Coupling Extention Nuts 18-8 / 304 Stainless Steel
8-32 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 5/16" Wrench Size
  • Length: 5/8"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$0.85

NHCOUP10-24
10-24 Coupling Extention Nuts 18-8 / 304 Stainless Steel
10-24 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 3/8" Wrench Size
  • Length: 3/4"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$0.95

NHCOUP1/4-20
1/4-20 Coupling Extention Nuts 18-8 / 304 Stainless Steel
1/4-20 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 3/8" Wrench Size
  • Length: 7/8"
  • Contact Our Sales Department For Bulk Pricing.
$1.00

NHCOUP5/16-18
5/16-18 Coupling Extention Nuts 18-8 / 304 Stainless Steel
5/16-18 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 7/16" Wrench Size
  • Length: 1"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$1.25

NHCOUP3/8-16
3/8-16 Coupling Extention Nuts 18-8 / 304 Stainless Steel
3/8-16 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 1/2" Wrench Size
  • Length: 1-1/8"
  • Contact Our Sales Department For Bulk Pricing.
$1.50

NHCOUP1/2-13
1/2-13 Coupling Extention Nuts 18-8 / 304 Stainless Steel
1/2-13 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 5/8" Wrench Size
  • Length: 1-1/4"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$2.25

NHCOUP5/8-11
5/8-11 Coupling Extention Nuts 18-8 / 304 Stainless Steel
5/8-11 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 7/8" Wrench Size
  • Length: 1-3/4"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$4.50

NHCOUP3/4-10
3/4-10 Coupling Extention Nuts 18-8 / 304 Stainless Steel
3/4-10 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 1" Wrench Size
  • Length: 2"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$5.50

NHCOUP1-8
1-8 Coupling Extention Nuts 18-8 / 304 Stainless Steel
1-8 Coupling Extention Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Made From 18-8 / 304 Stainless Steel.
  • 1-3/8" Wrench Size
  • Length: 2-1/2"
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$12.25