AN Bolt Markings

S

SantosDumont

Well Known Member

• Jan 17, 2020

• #1

I'm inventorying the hardware in my RV14 empennage kit. I'm confused by the multiple markings on these AN3-6A bolts.

Are these actually all the same bolt?

 

T

terrye

Well Known Member

• Jan 17, 2020

• #2

Yes. The 'X' designates an AN bolt. The rest are manufacturer's markings.

 

bjdecker

Well Known Member

Ambassador

• Jan 17, 2020

• #3

AN Bolts

http://www.zenithair.com/kit-data/ra/hardware.html

The "X" is what you're looking for -- the other three letters are the mfg of the bolt.

Cheers!

B

 

R

Ralph Inkster

Well Known Member

• Jan 17, 2020

• #4

If you don't already have one, suggest you pick up a copy of AC 43.13-1B / 2A,
provides answers to everything... than some.

 

wirejock

Well Known Member

• Jan 17, 2020

• #5

Mil-Spec

If that's not annoying, try and figure out Mil-Spec part numbers. What are they smoking?

 

S

SantosDumont

Well Known Member

• Jan 17, 2020

• #6

Thanks.

I couldn't find a reference in AC 43.13-1B that said what the X meant.


7-36. IDENTIFICATION.
Aircraft bolts may be identified by code markings on the bolt heads. These markings generally denote the material of which the bolt is made, whether the bolt is a standard AN-type or a special-purpose bolt, and sometimes include the manufacturer.

a. AN standard steel bolts are marked with either a raised dash or asterisk, corrosion resistant steel is marked by a single dash, and AN aluminum-alloy bolts are marked with two
raised dashes.

 

R

Red Mtn flyer

Well Known Member

• Jan 18, 2020

• #7

teaching trick

I've stolen from others:
Get an Aircraft Spruce print catalogue to keep on the shelf with your AC43.13 -- has pics of many/ most typical hardware. Easiest method to parse the leftover bags of randomness....

 

snopercod

Well Known Member

• Jan 18, 2020

• #8

Skybolt has an excellent catalog. I used to have a hard copy but I don't know if they offer them any more.

 

JonJay

Well Known Member

• Jan 18, 2020

• #9

General Aircraft Hardware use to send out a reference book. It is a great resource as well.