WTB 106mm Optic Case Mounting Screws

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AaronHorrocks
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WTB 106mm Optic Case Mounting Screws

Post by AaronHorrocks » Tue Oct 11, 2011 2:22 pm

WTB 106mm Optic Case Mounting Screws

I'm in need of the 6 screws that mount the Optics Case onto the M40 series 106mm Recoilless rifle.
Or at the vary least, to find out the size screws that go in there.

Here is the optics case set on the mounting bracket. You can see the 3 holes in the front.
Image

Here is the scope mounted, without the case. Screw holes are exposed.
Image
1952 M38A1C - 106mm Recoilless Rifle
1953 M38A1 - 1/4 Ton Army #20992444
1952 M100 - 1/4 Ton Army Trailer
1967 M52A2 - 5 Ton Tractor
1966 M172A1 - 25 Ton Lowboy
1983 M1061A1 - 5 Ton Trailer
1984 XM971E1 - 10 Ton E Data
1989 M116A2 - 3/4 Ton Trailer
M353


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Re: WTB 106mm Optic Case Mounting Screws

Post by TOWDOG » Mon Feb 06, 2012 4:01 pm

Did you ever figure out the size of this fastener?

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AaronHorrocks
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Re: WTB 106mm Optic Case Mounting Screws

Post by AaronHorrocks » Fri Feb 17, 2012 6:50 am

Negative. But I did find a lead on original screws. I'll spec them out when and if I get them.
1952 M38A1C - 106mm Recoilless Rifle
1953 M38A1 - 1/4 Ton Army #20992444
1952 M100 - 1/4 Ton Army Trailer
1967 M52A2 - 5 Ton Tractor
1966 M172A1 - 25 Ton Lowboy
1983 M1061A1 - 5 Ton Trailer
1984 XM971E1 - 10 Ton E Data
1989 M116A2 - 3/4 Ton Trailer
M353

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AaronHorrocks
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Re: WTB 106mm Optic Case Mounting Screws

Post by AaronHorrocks » Mon Jul 21, 2014 11:50 pm

I still need these screws if anyone has a lead on them, NSN, thread, etc???
1952 M38A1C - 106mm Recoilless Rifle
1953 M38A1 - 1/4 Ton Army #20992444
1952 M100 - 1/4 Ton Army Trailer
1967 M52A2 - 5 Ton Tractor
1966 M172A1 - 25 Ton Lowboy
1983 M1061A1 - 5 Ton Trailer
1984 XM971E1 - 10 Ton E Data
1989 M116A2 - 3/4 Ton Trailer
M353

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Re: WTB 106mm Optic Case Mounting Screws

Post by Guest 1 » Sun Jul 27, 2014 1:10 pm

Sir,
See below all components for the optic case. Disclaimer: while researching parts for this old system there are errors in the TM's, so don't hold my hand to a bible.
I also don't know why they reference nuts except for the latch assy I don't know where they would go due to plugged screw holes. The system I'm working on has 1/4" Allen socket heads holding the telescope on. Also note the 32ths safety wire, that would mean some of the Fillister head screws have holes for safety wire.
Cover, Telescope Mount, Assembly NSN 1290-00-300-8034
Consisting of;
Grommet, P/N 7595129
Seal, P/N 8299757
Rubber Strip, P/N 8299762
Washer, MS35333-73
Wire Lock, P/N MS20995C32
Screw, P/N MS35276-62, NSN 5305-00-058-7089 is non-std. Standard is 5305-00-912-4839
Pin, P/N 589776
Stud, P/N 8299754
Washer, P/N MS35333-73
Nut, P/N MS35650-304
Latch, P/N 9299685
Spring, P/N 8299740
Screw, P/N 8299751, NSN 5305-00-207-4954
Washer, P/N MS35333-74
Nut, P/N MS35690-430
Flap, P/N 8299760
Clip, P/N 8299755
Screw, P/N MS51958-42, NSN 5305-00-701-5058
Washer, P/N MS35333-72
Nut, P/N MS35650-384
Rivet, P/N 136005
Base, P/N 8299752
Cap, P/N 8299753

The M42 instrument light bracket calls for 4 each MS35276-244 screws.

V/R
Walt

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Re: WTB 106mm Optic Case Mounting Screws

Post by AaronHorrocks » Sun Jul 27, 2014 2:47 pm

5305-00-058-7089
This one appears to be #10-32 thread, and 7/16" long
It looks like this may be a good replacement: http://www.mcmaster.com/#90350a305/=t0vx54
I placed an order, so we'll see if it's right.

THSD THREAD SERIES DESIGNATOR UNF
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
CMLP THREAD QUANTITY PER INCH 32
AAJD THREAD CLASS 2A
AAJF THREAD DIRECTION RIGHT-HAND
AASA THREAD LENGTH 0.438 INCHES MAXIMUM
AASB FASTENER LENGTH 0.438 INCHES NOMINAL
CYAU SCREW MATERIAL STEEL CORROSION RESISTING
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE
CYBA SCREW SURFACE TREATMENT PASSIVATE
AASK HEAD STYLE A33 FILLISTER
AASL HEAD DIAMETER 0.292 INCHES MINIMUM AND 0.313 INCHES MAXIMUM
AASU HEAD HEIGHT 0.123 INCHES MINIMUM AND 0.130 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE B10 SLOT
CYBG HEAD HOLE CONFIGURATION STYLE C8 ROUND
ASXK HOLE QUANTITY 1
AAUB HOLE DIAMETER 0.046 INCHES NOMINAL
ZZZT NONDEFINITIVE SPEC/STD DATA I TYPE AND 5S STYLE
SR-1 MANUFACTURERS CODE 96906
SR-1 DEFINITIVE GOVERNMENT SPEC/STD REFERENCE MS35276-62


NSN 5305-00-207-4954
This one appears to be 1/4" with 28 thread.

THSD THREAD SERIES DESIGNATOR UNF
AHYM NOMINAL THREAD DIAMETER 0.250 INCHES
CMLP THREAD QUANTITY PER INCH 28
AAJD THREAD CLASS 2A
AAJF THREAD DIRECTION RIGHT-HAND
AASA THREAD LENGTH 0.490 INCHES MAXIMUM
AASB FASTENER LENGTH 1.125 INCHES NOMINAL
MATT MATERIAL STEEL COMP 303 OVERALL
AASK HEAD STYLE C44 FILLISTER
AASL HEAD DIAMETER 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM
AASU HEAD HEIGHT 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE D14 SLOT
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
AATN SHOULDER DIAMETER 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM FIRST SHOULDER
AATX SHOULDER LENGTH 0.630 INCHES MINIMUM AND 0.640 INCHES MAXIMUM FIRST SHOULDER
SR-5 MANUFACTURERS CODE 19200
SR-5 DESIGN CONTROL REFERENCE 8299751


NSN 5305-00-701-5058
Appears to be a #8-36?
This is a pan head, so it can't be right.

THSD THREAD SERIES DESIGNATOR UNF
AHYM NOMINAL THREAD DIAMETER 0.164 INCHES
CMLP THREAD QUANTITY PER INCH 36
AAJD THREAD CLASS 2A
AAJF THREAD DIRECTION RIGHT-HAND
AASA THREAD LENGTH 0.256 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
AASB FASTENER LENGTH 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
CYAU SCREW MATERIAL STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION 66 FED STD ALL MATERIAL RESPONSES
CYBA SCREW SURFACE TREATMENT PASSIVATE
CYBE SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
CQBC MINIMUM TENSILE STRENGTH 80000 POUNDS PER SQUARE INCH
AASK HEAD STYLE A23 PAN
AASL HEAD DIAMETER 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
AASU HEAD HEIGHT 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE B1 CROSS RECESS TYPE 1
1952 M38A1C - 106mm Recoilless Rifle
1953 M38A1 - 1/4 Ton Army #20992444
1952 M100 - 1/4 Ton Army Trailer
1967 M52A2 - 5 Ton Tractor
1966 M172A1 - 25 Ton Lowboy
1983 M1061A1 - 5 Ton Trailer
1984 XM971E1 - 10 Ton E Data
1989 M116A2 - 3/4 Ton Trailer
M353


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