Home  /   18-8 Stainless Steel Fastener Department  /  18-8 Stainless Steel Socket Head Screws  /  18-8 Stainless Steel Flat Socket Head Cap Screws  /  5/16-18 Diameter

 

5/16-18 Flat Head Socket Cap Screws 18-8 / 304 Stainless Steel

  • Flat Head Socket Screws are Sometimes Called Flat Socket Head Cap Screw, Socket Screws, Allen Flat Socket Bolts or Flat Socket Machine Screw.
  • A Flat Socket Head Cap Screw is a Fastener Driven by a Socket Hex Allen Wrench.
  • The Hexagonal Drive or Hex Key L Wrench Allows For Stronger Tightening Compared to Screws that use a Phillips or Flat Head Screw Driver That Sometimes Tend To Strip The Head Of The Screw.
  • Flat Head Cap Screws are Made to Fit Flush When Installed.
  • We Carry Flat Socket Screw Bolts in 18-8 / 304 Stainless Steel Which Is More Corrosion Resistant.
  • These are the Most Popular Flat Head Socket Cap Allen Wrench Screws for Many Production Applications.
  • 5/16"-18 Right Hand Thread, UNC
  • Please View Matching Nuts & Washers Below.


Item # Image Description Price
FHSHCS5/16X.75BAG25
5/16-18 x 3/4
5/16-18 x 3/4" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screws
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$10.25

FHSHCS5/16X10BAG25
5/16-18 x 1
5/16-18 x 1" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$10.75

FHSHCS5/16X125BAG25
5/16-18 x 1-1/4
5/16-18 x 1-1/4" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$11.25

FHSHCS5/16X15BAG25
5/16-18 x 1-1/2
5/16-18 x 1-1/2" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$11.75

FHSHCS5/16X200BAG10
5/16-18 x 2
5/16-18 x 2" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 10.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$6.25

FHSHCS5/16X225BAG10
5/16-18 x 2-1/4
5/16-18 x 2-1/4" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 10.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$6.75

FHSHCS5/16X250BAG10
5/16-18 x 2-1/2
5/16-18 x 2-1/2" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 10.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$7.25

FHSHCS5/16X300BAG10
5/16-18 x 3
5/16-18 x 3" Flat Socket Cap Screws 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 10.
  • 18-8 / 304 Stainless Steel.
  • Flat Head Socket Cap Screw.
  • Hex Key Size = 3/16"
  • Contact Our Sales Department For Bulk Pricing.
$8.25

FHSHCSASSTSS
FLAT HEAD SOCKET CAP SCREW Assortment Kit 18-8 / 304 Stainless Steel
FLAT HEAD SOCKET CAP SCREW Assortment Kit 18-8 / 304 Stainless Steel
  • Allen Flat Head Hex Drive Socket Cap Screws
  • 1750 Pieces In Large Drawer Bin Case.
  • 18-8 / 304 Stainless Steel
  • Includes Sizes 6-32, 8-32, 10-24, 1/4-20, 5/16-18, 3/8-16
  • View Extended Info For Lengths and Quantity.
$215.00

HEXKEY3/16
3/16 Allen Hex Key - Short Arm
3/16 Allen Hex Key - Short Arm
  • FOR 1/4" Diameter SOCKET CAP SCREWS
  • FOR 3/8" Diameter SOCKET SET SCREWS 
  • SOLD BY THE PIECE
$1.00

NHS5/16-18BAG25
5/16-18 Finish Hex Nuts 18-8 / 304 Stainless Steel
5/16-18 Finish Hex Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 5/16"-18 Coarse Thread Hex Nut,
  • 1/2" Flats-Wrench Size, 17/64" Thickness.
  • Made From 18-8 / 304 Stainless Steel.
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$2.50

NILS5/16-18BAG25
5/16-18 Nylon Insert Hex Lock Nuts 18-8 Stainless Steel
5/16-18 Nylon Insert Hex Lock Nuts 18-8 Stainless Steel
  • SOLD BY BAG OF 25.
  • 5/16"-18 Thread Nyloc Lock Nut
  • 1/2" Wrench Size.
  • Made From 18-8 / 304 Stainless Steel.
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$4.25

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

NILST5/16-18BAG25
5/16-18 THIN Nylon Insert Hex Jam Lock Nuts 18-8 / 304 Stainless Steel
5/16-18 THIN Nylon Insert Hex Jam Lock Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • Flats 0.502" Height 0.265"
  • 18-8 / 304 Grade Stainless Steel.
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$6.25

WFS5/16BAG
5/16
5/16" Flat Washers 18-8 / 304 Stainless Steel
  • SOLD IN BOXES OF 100.
  • 5/16" Standard Commercial Pattern Round Flat Washers.
  • Made From 18-8 / 304 Stainless Steel.
  • ID 0.343" OD 3/4" Thickness 0.050"
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
Special Pricing Available
$4.75

WAN5/16-516BAG
5/16
5/16" AN Flat Washers 900 Series 18-8 / 304 Stainless Steel
  • SOLD BY THE BOX OF 100
  • 18-8 / 304 Stainless Steel
  • ID: .328
  • OD: .562
  • Thickness: 1/16"
  • AN960C516
Special Pricing Available
$4.50

WSAE5/16-812BAG
5/16
5/16" SAE Flat Washers 18-8 / 304 Stainless Steel
  • SOLD BY THE BOX OF 100 
  • 18-8 / 304 Stainless Steel
  • ID: .343
  • OD:  .687
  • Thickness: .051 - .080
  • SAE 15795-812
Special Pricing Available
$4.75

NHSCAP5/16-18BAG25
5/16-18 Hex Acorn Cap Nuts 18-8 / 304 Stainless Steel
5/16-18 Hex Acorn Cap Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 9/16" Wrench Size.
  • 17/32" Height Overall.
  • Made From 18-8 / 304 Stainless Steel.
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$9.50

NWING5/16-18BAG25
5/16-18 Wing Nuts 18-8 / 304 Stainless Steel
5/16-18 Wing Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel.
  • Wing Nut Span = 1.25 "
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$6.75

NKLOCK5/16-18BAG25
5/16-18 Hex Kep K-Lock Nuts 18-8 / 304 Stainless Steel Keps
5/16-18 Hex Kep K-Lock Nuts 18-8 / 304 Stainless Steel Keps
  • SOLD BY BAG OF 25.
  • 1/2" Wrench Size.
  • 18-8 / 304 Grade Stainless Steel
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$5.25

NHFLG5/16-18BAG25
5/16-18 Hex Serrated Flange Nuts 18-8 / 304 Stainless Steel
5/16-18 Hex Serrated Flange Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Grade Stainless Steel.
  • Max Width Across Flats = .500
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$7.00

NTEENUT5/16X3/8BAG10
5/16-18 x 3/8 T-Nuts 4 Prong 18-8 / 304 Stainless Steel Tee Nut
5/16-18 x 3/8 T-Nuts 4 Prong 18-8 / 304 Stainless Steel Tee Nut
  • SOLD BY BAG OF 10..
  • 3/8" Barrel Length
  • 4 Prongs
  • Made From 18-8 / 304 Grade Stainless Steel.
Special Pricing Available
$9.50

NJS5/16-18BAG25
5/16-18 Thin Hex Jam Nuts 18-8 / 304 Stainless Steel
5/16-18 Thin Hex Jam Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 1/2" Wrench Size
  • Thickness: 3/16"
  • Contact Our Sales Department For Bulk Pricing
Special Pricing Available
$4.50

NHHS5/16-18BAG25
5/16-18 Heavy Hex Finish Nuts 18-8 / 304 Stainless Steel
5/16-18 Heavy Hex Finish Nuts 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • Extra Thick Hex Finish Nuts
  • Flats 9/16" Height 19/64"
  • Made From 18-8 / 304 Stainless Steel.
  • Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$8.00

NILSDOM5/16-18BAG25
5/16-18 Lock Nuts Purple Insert - Waxed 18-8 / 304 Stainless Steel
5/16-18 Lock Nuts Purple Insert - Waxed 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Grade Stainlesss Steel
  • Waxed Lock Nut to Prevent Galling
  • 1/2" Wrench Size
  • Contact Our Sales Department for Bulk and Wholesale Pricing
Special Pricing Available
$8.25

WLS5/16BAG
5/16
5/16" Split Ring Lock Washers 18-8 / 304 Stainless Steel
  • SOLD IN BOXES OF 100.
  • 5/16" Medium Profile Split Ring Lock Washers.
  • Made From 18-8 / 304 Stainless Steel.
  • ID 0.314" OD 0.583" Thickness 0.078"
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
Special Pricing Available
$5.00

WFDS5/16X125BAG25
5/16
5/16" x 1-1/4" Fender Washers 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • Large OD Flat Fender Washers
  • Made From 18-8 / 304 Stainless Steel
  • Thickness: .050
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
Special Pricing Available
$4.25

WFDS5/16X150BAG25
5/16
5/16" x 1-1/2" Fender Washers 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • Large OD Flat Fender Washers
  • Made From 18-8 / 304 Stainless Steel
  • Thickness: .062
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
Special Pricing Available
$5.00

WFDS5/16X200BAG25
5/16
5/16" x 2" Fender Washers 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • Large OD Flat Fender Washers
  • Made From 18-8 / 304 Stainless Steel
  • Thickness: .062
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
$10.00

WFSL5/16BAG25
5/16
5/16" x 7/8" Large OD Flat Washers 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • Made From 18-8 / 304 Stainless Steel.
  • 7/8" OD.
  •  CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
Special Pricing Available
$3.00

WFIS5/16BAG25
5/16 Cup Finishing Washers 18-8 / 304 Stainless Steel
5/16 Cup Finishing Washers 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel For Corrosion Resistance
  • ID: .344"
  • OD: .892"
  • Thickness: .161"
Special Pricing Available
$7.50

WINLW5/16BAG25
5/16
5/16" Internal Tooth Lock Washers 410 Stainless Steel
  • SOLD BY BAG OF 25.
  • 410 Grade Stainless Steel.
  • Serrated INTERNAL Tooth Star Washers. 
  • Please Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$7.25

WEXLW5/16BAG25
5/16
5/16" External Tooth Lock Washers 410 Stainless Steel
  • SOLD BY BAG OF 25.
  • 410 Grade Stainless Steel.
  • Serrated EXTERNAL Tooth Star Washers. 
  • Please Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$5.50

WNPW5/16BAG25
5/16
5/16" Neoprene Bonded Sealing Washers 18-8 / 304 Stainless Steel
  • SOLD BY BAG OF 25.
  • 18-8 / 304 Stainless Steel.
  • Neoprene Backed EPDM Rubber Seal Washer
  • OD: .750"
  • Please Contact Our Sales Department For Bulk Pricing.
Special Pricing Available
$7.25