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You guys want to hear a joke?

May 31 2017 at 4:38 PM
James V  (Login kimo57)
Group #188948

Called Williams peep sights today inquiring about their Twilight Peep apertures. Well the receptionist me connects to their expert. I asked the expert what is the thread size for their twilight peep & he tells me he does not know!!!
Anyone knows the thread size for their peeps?
Your stock should not be made of only walnut.

This message has been edited by kimo57 on May 31, 2017 10:54 PM

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(Login MDriskill)
Group #188948

Peep threads

June 1 2017, 6:26 AM 

Williams, Lyman, Redfield, and other classic US sights use a 7/32 X 40 thread.

German sights standardized on a 9.5 X 1.0 MM eyepiece thread by the 1950's. This facilitated an interesting aftermarket in accessories that will fit many different guns.

A really nifty thing to have is the inexpensive adapter bushing (sold by Champions Choice and others) which allows Euro disks to fit US sights. Here's one in action--an old HW 50 rifle, with a Williams sight sporting a Gehmann adjustable iris:

[linked image]

(As an aside...the fabled British Parker-Hale sights are also 7/32 X 40, though the steeper UK-standard thread angle makes the disk shaft slightly larger in diameter. Thus an odd situation where US disks fit P-H sights, but not the other way around. The exception is Lyman sights, which will usually take P-H disks.)

This message has been edited by MDriskill on Jun 25, 2017 8:50 AM

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DT Fletcher
(Login DTFletcher)
Group #188948

Crosman peep sight threading

June 1 2017, 10:05 AM 

The peep sights sometimes seen on the old 101 (1949 only)/107/108/109/110/113/114/118 rifles are also 7/32 X 40 thread.

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(Login r1lover)
Group #188948

Very informative Mike. Thanks for the extra effort/info. n/t

June 21 2017, 4:26 PM 

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(Login CrewSched)
Group #188948


June 21 2017, 7:09 PM 

Gehmann also makes a bushing (PH999) to adapt larger European discs to the Williams sight. They use a M.40x10 fine thread and it works okay but could be a little tighter. Personally I prefer the Champions Choice bushing as it is a tighter fit and doesn't break loose when twisting my adjustable iris.

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