Loctite® and Gun Screws.
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Hello. The purpose of this thread is to shead some light on the use of LOCTITE® and Gun Screws.
I believe we'll all agree that the common gun screw is well under 1/4" in Diameter. So let's take a look at what LOCTITE® has to offer for screws up to 1/4" in diameter.
First, theres Blue No. 220, but, it's a wicking grade thread locker for pre-assembled fasteners up to 1/4" Dia., so, it's pretty much out for gun use.
Second, theres Purple No. 222 for fasteners up to 1/4" Dia., but, it doesn't meet certain agency approvals such as MIL-S, ASTM D, Ect..
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Third & Thankfully, there's PURPLE*** No. 222MS, it's an easy removal thread locker designed for fasteners up to 1/4" Dia., and, 222MS meets the approvals of many different agencies including MIL-S.
So, going by the LOCTITE® Catalog, it sure looks like PURPLE*** No. 222MS was specifically designed for fasteners up to 1/4" Dia. and is the best suited thread locker that they offer for small gun screws.
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What makes the Purple No. 222MS so much better for small gun screws? Well, it's viscosity was designed for small screws & threads (it stays in the threads during assembly), it's easily removalable (so it's helps save your screw driver tips, screw heads & threads), not to mention it was specifically designed for small screws that's under 1/4" in Diameter.
Clean & Dry your parts well, and always Use a primer when "both" surfaces are considered inactive, ie. Plated Parts, Anodized Aluminum, Titanium, Stainless Steel, Galvanized Steel, Zinc, Pure Aluminum, Cadmium, Magnesium, Natural or Chemical Black Oxide, Magnetite Steel, Iconel, Silver, Gold & Plastics.
Active Metals are considered to be, Iron, Plain Steel, Copper, Brass, Commerical Aluminum, ie. T 6061, Bronze, Nickel, Maganese, Monel & Kovar.
LOCTITE® 7471 Primer T has a 7 day on-part-life, and LOCTITE® 7649 Primer N has a 30 day on-part-life and is Ideal for cure conditions below room temperature. So, if it's room temp or above and your gonna install your screws in 7 days or less, use 7471 Primer T, and if your in colder areas use 7649 Primer N.
__________________
*** TRIED 3 X'S TO CHANGE FONT COLOR...NO LUCK! :O(
--------------------------------------------------------------------------------
Hello. The purpose of this thread is to shead some light on the use of LOCTITE® and Gun Screws.
I believe we'll all agree that the common gun screw is well under 1/4" in Diameter. So let's take a look at what LOCTITE® has to offer for screws up to 1/4" in diameter.
First, theres Blue No. 220, but, it's a wicking grade thread locker for pre-assembled fasteners up to 1/4" Dia., so, it's pretty much out for gun use.
Second, theres Purple No. 222 for fasteners up to 1/4" Dia., but, it doesn't meet certain agency approvals such as MIL-S, ASTM D, Ect..
---------------------------------------
Third & Thankfully, there's PURPLE*** No. 222MS, it's an easy removal thread locker designed for fasteners up to 1/4" Dia., and, 222MS meets the approvals of many different agencies including MIL-S.
So, going by the LOCTITE® Catalog, it sure looks like PURPLE*** No. 222MS was specifically designed for fasteners up to 1/4" Dia. and is the best suited thread locker that they offer for small gun screws.
--------------------------------------
What makes the Purple No. 222MS so much better for small gun screws? Well, it's viscosity was designed for small screws & threads (it stays in the threads during assembly), it's easily removalable (so it's helps save your screw driver tips, screw heads & threads), not to mention it was specifically designed for small screws that's under 1/4" in Diameter.
Clean & Dry your parts well, and always Use a primer when "both" surfaces are considered inactive, ie. Plated Parts, Anodized Aluminum, Titanium, Stainless Steel, Galvanized Steel, Zinc, Pure Aluminum, Cadmium, Magnesium, Natural or Chemical Black Oxide, Magnetite Steel, Iconel, Silver, Gold & Plastics.
Active Metals are considered to be, Iron, Plain Steel, Copper, Brass, Commerical Aluminum, ie. T 6061, Bronze, Nickel, Maganese, Monel & Kovar.
LOCTITE® 7471 Primer T has a 7 day on-part-life, and LOCTITE® 7649 Primer N has a 30 day on-part-life and is Ideal for cure conditions below room temperature. So, if it's room temp or above and your gonna install your screws in 7 days or less, use 7471 Primer T, and if your in colder areas use 7649 Primer N.
__________________
*** TRIED 3 X'S TO CHANGE FONT COLOR...NO LUCK! :O(
