Brake Drum Safety Wired Bolts.

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Guam0311
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Brake Drum Safety Wired Bolts.

Post by Guam0311 » Tue Jun 05, 2018 3:34 pm

Does anyone know the equivalent PN for the four bolts attaching the drive shaft to the brake drum companion flange? manual calls for PN 7966811-1, NSN 5306-00-832-6810. I been researching the fastener and cannot find it anywhere?

Chuck W.
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Re: Brake Drum Safety Wired Bolts.

Post by Chuck W. » Thu Jun 07, 2018 8:03 am

one of the members on here had them reproduced, forgot who it was. I purchased a dozen or so from him, and can provide you with 4 if you can't find them anywhere else.
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Lance-W
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Re: Brake Drum Safety Wired Bolts.

Post by Lance-W » Thu Jun 07, 2018 11:20 am

MS20073-05-14 ???

The head height is slightly larger at .266-.297 compared to .224-.244 but otherwise dimensionally they're identical
5306-00-832-6810 Features
MRC Parameter Characteristics
AAJD Thread Class 3A
AAJF Thread Direction Right-hand
AASA Thread Length 0.484 inches minimum and 0.546 inches maximum
AASB Fastener Length 0.985 inches minimum and 1.015 inches maximum
AASK Head Style Hexagon
AASU Head Height 0.224 inches minimum and 0.244 inches maximum
AATB Width Between Flats 0.489 inches minimum and 0.499 inches maximum
AAUB Hole Diameter 0.062 inches nominal
AHYM Nominal Thread Diameter 0.312 inches
ASXK Hole Quantity 2
BQDM Hole Type Drilled
CBBL Features Provided Finished head
CMLP Thread Quantity per Inch 24
CRHC Hole Configuration Style Hexagon flats
MATT Material Steel comp 1035 overall or steel comp 1040 overall or steel comp 1042 overall or steel comp 1045 overall or steel comp 1137 overall or steel comp 1139 overall or steel comp 1140 overall or steel comp 1141 overall
MDCL Material Document and Classification Astm A108 assn std 1ST material response overall or astm A108 assn std 2ND material response overall or astm A108 assn std 3RD material response overall or astm A108 assn std 4TH material response overall or QQ-S-637 fed spec 5TH material response overall or QQ-S-637 fed spec 8TH material response overall
THSD Thread Series Designator UNF

Guam0311
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Re: Brake Drum Safety Wired Bolts.

Post by Guam0311 » Thu Jun 07, 2018 3:21 pm

Chuck W. wrote:
Thu Jun 07, 2018 8:03 am
one of the members on here had them reproduced, forgot who it was. I purchased a dozen or so from him, and can provide you with 4 if you can't find them anywhere else.
Thanks Chuck, I am researching two of some what equivalent bolts, If they are more then adequate I will post them here. If not I will take you up on that offer.

Guam0311
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Re: Brake Drum Safety Wired Bolts.

Post by Guam0311 » Thu Jun 07, 2018 3:34 pm

Lance-W wrote:
Thu Jun 07, 2018 11:20 am
MS20073-05-14 ???

The head height is slightly larger at .266-.297 compared to .224-.244 but otherwise dimensionally they're identical
5306-00-832-6810 Features
MRC Parameter Characteristics
AAJD Thread Class 3A
AAJF Thread Direction Right-hand
AASA Thread Length 0.484 inches minimum and 0.546 inches maximum
AASB Fastener Length 0.985 inches minimum and 1.015 inches maximum
AASK Head Style Hexagon
AASU Head Height 0.224 inches minimum and 0.244 inches maximum
AATB Width Between Flats 0.489 inches minimum and 0.499 inches maximum
AAUB Hole Diameter 0.062 inches nominal
AHYM Nominal Thread Diameter 0.312 inches
ASXK Hole Quantity 2
BQDM Hole Type Drilled
CBBL Features Provided Finished head
CMLP Thread Quantity per Inch 24
CRHC Hole Configuration Style Hexagon flats
MATT Material Steel comp 1035 overall or steel comp 1040 overall or steel comp 1042 overall or steel comp 1045 overall or steel comp 1137 overall or steel comp 1139 overall or steel comp 1140 overall or steel comp 1141 overall
MDCL Material Document and Classification Astm A108 assn std 1ST material response overall or astm A108 assn std 2ND material response overall or astm A108 assn std 3RD material response overall or astm A108 assn std 4TH material response overall or QQ-S-637 fed spec 5TH material response overall or QQ-S-637 fed spec 8TH material response overall
THSD Thread Series Designator UNF



Thanks for the specs Lance. That MS bolt looks like its good to go. I ordered some from Airparts INC. Kansas City. I also ordered some AN5H-6A bolts from Aircraft Spruce company. Tensile strength is 125,000 minimum. 8740 alloy steel. Cad plated. When I get them I will post the results.

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