Open by APPOINTMENT ONLY - Masks Required

We will have strict policies on the number of people in the store and hope you will respect us enough to touch only what you are buying.

Thank you, Stay Healthy and Safe

1/4-20 x 4.5" machine bolt (partial thread)

In stock
1/4" Square head machine Bolts
Item #
182C-macbolt
$1.25
1/4-20 x 4.5" machine bolt (partial thread) is available to buy in increments of 10
1/4" Square head machine Bolts
1/4" Square head machine Bolts
1/4" Square head machine Bolts

Great Old-Fashioned Square head Machine Bolts for a much more traditional look.  Some of the machine bolts we sell are old stock and finish can vary from flat to glossy


500 piece discount = 20% off

1000 piece discount = 30% off

  • Black Oxide, followed by an appropriate post-treatment, provides limited added corrosion protection to the surface of the metal, prolonging service and increasing the shelf-life of stored parts. 

Standard Thread Length - If you have a specific thread length you need please call to verify.  The minimum thread length shall be equal to one-half the nominal screw length plus 1/2" or 6”, whichever is less. However some of our stock is truly custom and therefore please call if you need a specific thread length.

More Information
shank diameter 1/4
thread 1/4-20
length below head 4.5"
finish coating Black Oxide
package quantity 10/pk.
Write Your Own Review
You're reviewing:1/4-20 x 4.5" machine bolt (partial thread)
Your Rating