< 5/16" Stainless Steel Solar Hex Head Cap Screws - Marsh Fasteners
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5/16" Stainless Steel Solar Hex Head Cap Screws.

  • 5/16-18 Solar Panel Rack Stainless Steel Hex Bolts Have a Hexagonal Head Used With a Wrench or a Socket.
  • Hex Head Cap Bolts are a Primary Fastener Type For Many Solar Panel Racking, Clamps, and Bracket Thru-Bolting Applications.
  • As a General Hex Cap Screw Rule: Thread Length is: 2X The Diameter Plus 1/2".
  • For Fully Threaded Hex Bolts Please View Our FULL THREAD Tap Bolt Category.
  • Made of 18-8 / 304 Grade Stainless Steel Which is an Austenitic Grade of Stainless Steel.
  • 5/16"-18 Right Hand Thread, UNC
  • CHECK OUT OUR OTHER CATAGORIES FOR MORE SIZES. 


Item # Image Description Price
BS5/16-18X.75
5/16-18 x 3/4
5/16-18 x 3/4" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.15

BS5/16-18X100
5/16-18 x 1
5/16-18 x 1" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.35

BS5/16-18X125
5/16-18 x 1-1/4
5/16-18 x 1-1/4" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.25

BS5/16-18X150
5/16-18 x 1-1/2
5/16-18 x 1-1/2" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.27

BS5/16-18X200
5/16-18 x 2
5/16-18 x 2" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.34

BS5/16-18X250
5/16-18 x 2-1/2
5/16-18 x 2-1/2" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.40

BS5/16-18X300
5/16-18 x 3
5/16-18 x 3" Hex Head Cap Bolts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Hex Head Cap Screws.
  • 18-8 / 304 Grade Stainless Steel.
  • 1/2" Wrench Size, 13/64" Head Height.
  • Contact Our Sales Department For Bulk Pricing.
$0.45

NHS5/16-18
5/16-18 Finish Hex Nuts 18-8 / 304 Stainless Steel
5/16-18 Finish Hex Nuts 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • 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.
$0.06

WNPW5/16
5/16
5/16" Neoprene Bonded Sealing Washers 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • 18-8 / 304 Stainless Steel.
  • Neoprene Backed EPDM Rubber Seal Washer
  • OD: .750"
  • Please Contact Our Sales Department For Bulk Pricing.
$0.15

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.
$4.75

WLS5/16
5/16
5/16" Split Ring Lock Washers 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • 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.
$0.06

NILS5/16-18
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 THE PIECE.
  • 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.
$0.13

NKLOCK5/16-18
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 THE PIECE.
  • 1/2" Wrench Size.
  • 18-8 / 304 Grade Stainless Steel
  • Contact Our Sales Department For Bulk Pricing.
$0.20

NHFLG5/16-18
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 THE PIECE.
  • 18-8 / 304 Grade Stainless Steel.
  • Max Width Across Flats = .500
  • Contact Our Sales Department For Bulk Pricing.
$0.17

NHHS5/16-18
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 THE PIECE.
  • 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.
$0.20

WFDS5/16X125
5/16
5/16" x 1-1/4" Fender Washers 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Large OD Flat Fender Washers
  • Made From 18-8 / 304 Stainless Steel
  • Thickness: .050
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
$0.15

WFDS5/16X150
5/16
5/16" x 1-1/2" Fender Washers 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Large OD Flat Fender Washers
  • Made From 18-8 / 304 Stainless Steel
  • Thickness: .062
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
$0.16

WFDS5/16X200
5/16
5/16" x 2" Fender Washers 18-8 / 304 Stainless Steel
  • SOLD BY THE PIECE.
  • Large OD Flat Fender Washers
  • Made From 18-8 / 304 Stainless Steel
  • Thickness: .062
  • CONTACT OUR SALES DEPARTMENT FOR BULK PRICING.
$0.50

WINLW5/16
5/16
5/16" Internal Tooth Lock Washers 410 Stainless Steel
  • SOLD BY THE PIECE.
  • 410 Grade Stainless Steel.
  • Serrated INTERNAL Tooth Star Washers. 
  • Please Contact Our Sales Department For Bulk Pricing.
$0.05

WEXLW5/16
5/16
5/16" External Tooth Lock Washers 410 Stainless Steel
  • SOLD BY THE PIECE.
  • 410 Grade Stainless Steel.
  • Serrated EXTERNAL Tooth Star Washers. 
  • Please Contact Our Sales Department For Bulk Pricing.
$0.08

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
$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
$4.75