What is a 8 40 screw?

160 Diameter x . 470 length)

What size screws for warne scope rings?

M912/873M HS Precision (8-40 screws), Matte.

What is a 6 48 screw?

6-48 screws. These screws are USA made, T15 Torx head drive, spec hardened for mounting applications, these screws are designed with a 45 degree taper under the head to seat into a 45 degree counterbore that we use on our 6-48 screw hole mounts.

What is Fillister head screw?

Fillister machine screws have a rounded top surface, cylindrical sides, and a flat bearing surface. The greater side height is what distinguishes a fillister head from a pan head. A fillister machine screw is the preferred style for use in counterbored holes.

What is the proper torque for scope rings?

Incrementally tighten your scope ring screws to our recommend torque-poundage – about 15-18in. lbs, without the use of any thread-locker. If you’re mounting horizontally split rings, be mindful of the gaps on either side of the rings, trying to keep them evenly spaced.

What is a fillister head?

Definition of fillister head : a slotted cylindrical screwhead with a convex or flat top.

What size drill bit do I need for a 6 48 tap?

To Tap This Size Screw Or Bolt:	Use This Drill Bit:	Decimal Inches
6-36 NS	#34	.1110
6-40 NF	#33	.1130
6-48 NS	#31	.1200
4mm-0.70mm	3.4mm	.1338

Should Loctite be used on scope mounts?

Most of the companies that make rings and mounts recommend not using Loctite for a couple of reasons. If you use Loctite it may make it hard to take the screws out later if you have a reason or desire to remove them, it may even cause the screw to become hard to remove.

Why is it called a cheese head screw?

Cheese Head Machine Screws have a round cylindrical head with a flat top, usually have a slot drive. Slotted screw heads are perhaps the oldest and most common variety; a linear slot in the head accepts a standard screwdriver, which is also called a flat-head screwdriver.

What is the formula for tap drill size?

Tap-drill diameter equals nominal diameter minus thread pitch. For example, drill size for a 3/8-16 thread is 0.375 0.0625 (pitch) = 0.312 in. in diameter, and for a 10-32 thread, the drill diameter is 0.190 0.032 = 0.159 in. (a #21 drill).

What does fillister head mean?

What is a Torx screw?

These screws have a Torx or Torx-Plus drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess. These metric screws have a Torx drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

What are 18 8 screws made of?

Made from alloy steel, these screws are twice as strong as standard steel Torx flat head screws. These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic.

What is a tamper-resistant Torx screwdriver?

A tamper -resistant Torx driver is required for installation and removal. Also known as pin-in- Torx, these screws allow you to apply extra force with less slippage or damage to the recess. A tamper -resistant Torx driver is required for installation and removal.

What kind of Screws do you use for button heads?

These 18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools. Made from 18-8 stainless steel, these metric button head screws have good chemical resistance and may be mildly magnetic.