Common questions

What size are rifle scope mount screws?

What size are rifle scope mount screws?

Screw Lengths: ¼”: ¼” (6.36mm), 3/8″ (9.5mm), ½” (12.7mm), 9/16″ (14.28mm). Screw Sizes: 6-40, 6-48, 8-40 tpi.

What size is a 8 40 screw?

160 Diameter
160 Diameter x . 470 length)

What size Screws for Savage Scope Mount?

8-40 screws
Savage centerfire rifles use #6-48 or #8-40 screws and there are a few ways to determine the screw hole size on your rifle in order to find the right base.

What is a number 8 screw in MM?

American Screw Sizes

Size Nearest Fraction Millimeter
#8 5/32 4.2
#10 3/16 4.8
#12 7/32 5.5

How big is a number 8 screw?

The #8 gauge screw has a major diameter of 0.17″ and 8 TPI. The screw is 1-1/4″ long, a measurement taken from the bottom of the head to the point.

What size is an 8 screw?

UK Screw Sizes – Imperial vs. Metric

METRIC – 4mm Diameter IMPERIAL – Gauge Size 8
12mm in length ½ an inch in length
16mm in length 5/8 of an inch in length
20mm in length ¾ of an inch in length
25mm in length 1 inch in length

What size screws do you use for scope base?

Our scope base was designed for the original 6-48 screws so the screw clearance holes need to be opened up for the larger 8-40 screws and the counterbores for the screw heads will need to be enlarged. Clamping the scope base in the mill vise, I located the first hole with a .146-inch gauge pin and zeroed the readout.

What size screws do I need for my savage scope mounts?

Most Savage Ultra Lights and Timberlines are being produced with the 8-40 screws. Click here for the smaller 6-48 screw Savage Scope Mounts. What is the proper mount and screws for my Savage Centerfire Rifle? Not sure what Savage Rifle or screws size you have?

What is the best scope mount for a Remington 700?

Simply said, Talley Scope Mounts are the best. Designed to fit Remington 700 series rifles, to include the 721-722-725 and 40X rifles with the larger 8-40 mounting screws (also fits these other Remington 700 footprint actions with 8-40 screws ). This mount comes with 8-40 screws, most Remington 700 rifles use 6-48.

What size drill bit do you use to drill scope base holes?

The chuck was centered on the scope base holes with a .146 gauge pin. The scope base holes were drilled with a No. 19 drill to fit the 8-40 screws and the pilot on the Weaver counterbore. The counterbores in the scope base must be opened up to fit the new 8-40 screw heads.