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Old 06-08-2018, 04:36 PM
fc60 fc60 is offline
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Default Rear Sight Hole Spacing

Greetings,

I have what appears to be a K-frame rear sight assembly.

The odd part is the distance from the elevation screw hole to the mounting hole is about 1.760". Much shorter than the sights on my M-67 and M-14.

It certainly does not match up with any of my N-frame pistols.

Is there a chart showing the various hole patterns and models used on?

Cheers,

Dave
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Old 06-09-2018, 06:19 PM
Tired Gunsmith Tired Gunsmith is offline
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There were more than one configurations on the sight screw location.
Never remembered when the reference to which guns had the change instituted.
Must have been a change order issued, but no longer have my old books.
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Old 06-09-2018, 06:58 PM
2152hq 2152hq is offline
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It's for a pre-14, pre-17,,ect.

The hole spacing changed when they went to the Model w/number system I believe (1957..?).

Similar change in the N frame revolvers,,a different hole spacing from the 'pre-model' guns to the Model# guns.
But the K and the N spacings are different from each other of course.
(IIRC the N frame guns attachment screw are approx .010 farther 'out' than the K frame)

A pre-14 in my hand (1954 mfg) measures right about 1.750 betw the centers of the adj screw and the attachment screw when checked with my MickyD Pro-Gunsmith Dial Caliper and Can Opener Survival Tool.
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Old 06-09-2018, 10:31 PM
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Alk8944 Alk8944 is offline
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Quote:
Originally Posted by 2152hq View Post
It's for a pre-14, pre-17,,ect.

The hole spacing changed when they went to the Model w/number system I believe (1957..?).

Similar change in the N frame revolvers,,a different hole spacing from the 'pre-model' guns to the Model# guns.
But the K and the N spacings are different from each other of course.
(IIRC the N frame guns attachment screw are approx .010 farther 'out' than the K frame)

A pre-14 in my hand (1954 mfg) measures right about 1.750 betw the centers of the adj screw and the attachment screw when checked with my MickyD Pro-Gunsmith Dial Caliper and Can Opener Survival Tool.

Unfortunately this information is incorrect.

Per SCSW4, Model 14, page211; "Engineering and production changes; 14-3 1967, Relocation of the rear sight leaf screw" This follows through all K-T Frame -3 changes for all models.

I had to look it up because I didn't recall the dash change. I did know it was after my 14-1 however.
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Old 06-10-2018, 12:24 AM
Hondo44 Hondo44 is offline
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From what I've read the change was to move the attachment hole off of, forward of the barrel/cyl gap.
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Old 06-10-2018, 08:46 AM
2152hq 2152hq is offline
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Sorry, looks like I goofed up on when it came to be.
Thought they were changed at the model name/model # switch.

Open the cylinder and look under the top strap. If you can plainly see the attachment screw hole, it's the short hole spacing.
If not , it's forward up under the bbl shank,,it's the longer hole spacing.
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Old 06-27-2018, 06:06 AM
Bushytale Bushytale is offline
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The shorter/early spacing was changed with the -3 on all the K-frame adjustable sight models. So models 14,15,16,17,18,and 19 -2 and earlier will use the shorter spacing.
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