SteelThermal Black Oxide
307108-1000
5/16"-18 x 7/8" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$368.34 – $1,096.25
Bulk Box (1,000 pcs)
$1,096.25
5/16"-18 Socket Head Cap Screws
248 products
5/16-18 Socket Head Cap Screws in all available lengths, grades, materials, and finishes. This collection covers every 5/16-18 option in stock — use the filters to narrow by length, grade, material, and finish.
5/16-18 Thread Specifications
- Nominal diameter: 0.3125"
- Threads per inch: 18
- Tap drill (75% thread): F (0.257")
- Clearance hole (close fit): 21/64" (0.328")
- Clearance hole (free fit): 11/32" (0.344")
To thread a 5/16-18 hole, drill with a F (0.257") tap drill for a standard 75% thread. For a clearance hole that the 5/16-18 screw passes through, use 21/64" (0.328") for a close fit or 11/32" (0.344") for a free fit. Pair with a matching 5/16-18 nut or tapped hole.
Orders before 12 PM ET ship same day.
Read more ↓Show less ↑
SteelThermal Black Oxide307116-5005/16"-18 x 2" Socket Head Cap Screws (1936 Series), Partial Thread / Alloy Steel / Thermal Black Oxide
$463.73 – $690.07Bulk Box (500 pcs) $690.07
SteelThermal Black Oxide307107-1005/16"-18 x 4 3/4" Socket Head Cap Screws / Alloy Steel / Black Oxide / Partial Thread
$4,606.06Package (100 pcs) $4,606.06
SteelThermal Black Oxide307115-5005/16"-18 x 1 3/4" Socket Head Cap Screws (1936 Series), Partial Thread / Alloy Steel / Thermal Black Oxide
$407.65 – $606.62Bulk Box (500 pcs) $606.62
SteelThermal Black Oxide307100-12505/16"-18 x 3/8" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$343.85 – $1,279.22Bulk Box (1,250 pcs) $1,279.22
SteelThermal Black Oxide307102-12505/16"-18 x 1/2" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$331.30 – $1,232.53Bulk Box (1,250 pcs) $1,232.53
SteelThermal Black Oxide307104-12505/16"-18 x 5/8" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$319.20 – $1,187.50Bulk Box (1,250 pcs) $1,187.50
SteelThermal Black Oxide271223-1505/16"-18 x 3 1/2" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$1,395.86Bulk Box (150 pcs) $1,395.86
SteelThermal Black Oxide271221-1505/16"-18 x 3 1/4" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$1,334.48Bulk Box (150 pcs) $1,334.48
SteelThermal Black Oxide271217-2005/16"-18 x 2 3/4" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$1,214.36Bulk Box (200 pcs) $1,214.36
SteelThermal Black Oxide271215-2005/16"-18 x 2 1/2" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$803.19Bulk Box (200 pcs) $803.19
SteelThermal Black Oxide271219-2005/16"-18 x 3" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$713.30Bulk Box (200 pcs) $713.30
SteelThermal Black Oxide271213-2005/16"-18 x 2 1/4" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$1,413.25Bulk Box (200 pcs) $1,413.25
SteelThermal Black Oxide271205-2005/16"-18 x 1 1/4" Socket Head Cap Screws with Nylon Pellet, Full Thread / Alloy Steel / Thermal Black Oxide
$586.80 – $657.22Bulk Box (200 pcs) $586.80
SteelThermal Black Oxide271211-2005/16"-18 x 2" Socket Head Cap Screws with Nylon Pellet, Partial Thread / Alloy Steel / Thermal Black Oxide
$72.07 – $121.08Bulk Box (200 pcs) $72.07
SteelThermal Black Oxide271207-2005/16"-18 x 1 1/2" Socket Head Cap Screws with Nylon Pellet, Full Thread / Alloy Steel / Thermal Black Oxide
$1,325.16Bulk Box (200 pcs) $1,325.16
SteelThermal Black Oxide271203-3005/16"-18 x 1" Socket Head Cap Screws with Nylon Pellet, Full Thread / Alloy Steel / Thermal Black Oxide
$1,211.91 – $1,623.09Bulk Box (300 pcs) $1,623.09
SteelThermal Black Oxide271195-5005/16"-18 x 1/2" Socket Head Cap Screws with Nylon Pellet, Full Thread / Alloy Steel / Thermal Black Oxide
$734.88 – $1,640.36Bulk Box (500 pcs) $1,640.36
SteelThermal Black Oxide271197-5005/16"-18 x 5/8" Socket Head Cap Screws with Nylon Pellet, Full Thread / Alloy Steel / Thermal Black Oxide
$556.09 – $1,241.28Bulk Box (500 pcs) $1,241.28
SteelPlain018205-505/16"-18 x 1 1/4" Socket Head Cap Screws, Full Thread / Alloy Steel / Plain
$1,138.70 – $5,083.48Package (50 pcs) $1,138.70
BronzePlain017205-10005/16"-18 x 1 1/4" Socket Head Cap Screws, Full Thread / Silicon Bronze / Plain
$1,086.79 – $4,851.75Bulk Box (1,000 pcs) $4,851.75
SteelPlain018199-505/16"-18 x 3/4" Socket Head Cap Screws, Full Thread / Alloy Steel / Plain
$1,545.38 – $6,899.00Package (50 pcs) $1,545.38
SteelPlain018197-505/16"-18 x 5/8" Socket Head Cap Screws, Full Thread / Alloy Steel / Plain
$1,414.22 – $6,313.50Package (50 pcs) $1,414.22
BronzePlain017201-10005/16"-18 x 7/8" Socket Head Cap Screws, Full Thread / Silicon Bronze / Plain
$864.47 – $3,859.25Bulk Box (1,000 pcs) $3,859.25
Item added to cart