AN178-40

Aeronautical Standard Close Tolerance Bolt

email this to someone  
Description:

Fastener Length: 4-3/32", Thread: 1/2-20, Thread Length: 25/32",

* Manufacturer certifications are shipped with your order FREE of charge
no image available
Notice: AN178-40 is currently unavailable for immediate purchase. Click the button below to add this item to the request a quote form and receive an official pricing and availability quote by email.

Add to Quote

AN178-40 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.782 inches minimum
Fastener Length:
4.094 inches nominal
Head Style:
Hexagon
Head Height:
0.265 inches minimum and 0.297 inches maximum
Width Between Flats:
0.740 inches minimum and 0.752 inches maximum
Grip Diameter:
0.4986 inches minimum and 0.4991 inches maximum
Shank Unthreaded Hole Diameter:
0.106 inches nominal first hole
Thread Diameter:
0.500 inches
Grip Length:
3.312 inches nominal
Thready Qty Per Inch (tpi):
20
Min. Tensile Strength (psi):
125000 pounds per square inch
Hardness Rating:
26.0 rockwell c minimum overall and 32.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center:
0.609 inches nominal first hole
Surface Finish:
63.0 microinches bearing surface of head
Surface Finish:
63.0 microinches grip
Material:
Steel comp 4140 overall or steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4130 overall or steel comp 4037 overall
Material Specification:
Mil-s-5626 mil spec 1st material response overall or mil-s-6049 mil spec 2nd material response overall or mil-s-6050 mil spec 3rd material response overall or mil-s-6098 mil spec 4th material response overall or mil-s-6758 mil spec 5th material response overall or ams 6300 assn std 6th material response overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416 type 2 class 3 fed spec all treatment responses overall
Thread Series Designator:
Unf
Quick Specs
Thread Size 1/2
Thread Qty 20
Material Steel
Length 4-3/32

Additional Information

SKU / Model: AN17840
NSN: 5306-00-180-0337
FSC: Bolts / 5306
Product Series: AN178
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 5
Schedule B: 7318.15.8085
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
AN178-40_Military-Fasteners-com.pdf
Worldwide Shipping

* report an issue on this page

More AN178 close tolerance bolts

AN178H27

Fastener Length: 2-63/64in., Hole Diameter: 1/16in., Thread: 1/2-20, Thread Length: 53/64in.

AN178H24

Fastener Length: 2-19/32", Hole Diameter: 1/16", Thread: 1/2-20, Thread Length: 25/32"

AN178-55

Fastener Length: 5-3/4", Thread: 1/2-20, Thread Length: 53/64"

AN178-26

$49.14 Each, Length: 2-27/32in., grip: 2-1/16in., thread: 1/2-20, cadmium plated steel drilled shank

AN178-22A

$16.20 Each, Length: 2-11/32in., grip: 1-9/16in., thread: 1/2-20, cadmium plated steel undrilled shank

AN178-11

Fastener Length: 1-1/4", Thread: 1/2-20, Thread Length: 53/64"

Have a question

If you require a quote on this or any product please visit our quote request page »

Browse our frequently asked questions page.

You may contact us by phone at +1 (904) 543-6395 or email us using our contact form.

Our hours of operation are 8:00am - 6:00pm EST

Customer Reviews

Google View our Google profile

My new David Clark headset arrived earlier than expected and everything was perfect. Whole order/delivery experience was excellent.

4.0

10/10 service! My go to for all things mil spec hardware. Their customer service team is superb! Trisha had a quote back to us in a matter on minutes. Love working with Military Fasteners

5.0

No improvements necessary. A flawless on-line ordering system with an on-time delivery.

5.0

Best source for mil spec hardware. Website is user friendly, inventory is expansive, overnight shipment is a huge plus, and customer support is responsive and very helpful.

5.0