NAS517-4-21

Machine Screw

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Description:

Fastener Length: 1-51/64", Thread: 1/4-28, Thread Length: 1/2

* Manufacturer certifications are shipped with your order FREE of charge
NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21
Add to Cart Up to qty 2000 ships same day if ordered before 4pm EST
NAS517-4-21 Price:
buy now
$1.85 Each
Quantity:
Pre-packaged bag qty: 25 ea
* Sold in increments of 25
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NAS517-4-21 Datasheet Features and Specification

Thread Qty Per Inch (tpi):
28
Thread Direction:
Right-hand
Thread Length:
Between 0.368 inches and 0.514 inches
Thread Class:
3a
Thread Diameter:
0.250 inches
Screw Surface Treatment:
Cadmium
Min. Tensile Strength (psi):
160000 pounds per square inch
Screw Material:
Steel comp 8630
Screw Material Specification:
Mil-s-6050 military specification single material response or an-s-9 military standard single material response
Head Style:
Flat countersunk
Internal Drive Style:
Cross recess type 1
Head Diameter:
Between 0.452 inches and 0.510 inches
Hardness Rating:
Between 36.0 rockwell c and 40.0 rockwell c
Fastener Length:
Between 1.766 inches and 1.811 inches
Countersink Angle:
Between 99.0 degrees and 101.0 degrees
Thread Series Designator:
Unf (fine thread)
Quick Specs
Thread Size 1/4
Thread Qty 28
Thread Series UNF
Thread Class 3A
Material Steel

Additional Information

SKU / Model: NAS517421
NSN: 5305-00-637-7908
FSC: Screws / 5305
Product Series: NAS517
Pack Weight (Approx.) 0.626 lb
Minimum Qty (MOQ): 25
Schedule B: 7318.15.6080
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
NAS517-4-21_Military-Fasteners-com.pdf
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More NAS517 machine screws

NAS517-8-6

Fastener Length: 1-9/64", Thread: 1/2-20, Thread Length: 25/32"

NAS517-6-9

$2.10 EA, Fastener Length: 1-13/64in., Thread: 3/8-24, Thread Length: 21/32in.

NAS517-6-6

$3.90 EA, Fastener Length: 63/64in., Thread: 3/8-24, Thread Length: 21/32in.

NAS517-6-5

$1.50 EA, Fastener Length: 61/64in., Thread: 3/8-24, Thread Length: 21/32in.

NAS517-6-28

$44.70 Ea

NAS517-6-27

Fastener Length: 2-21/64", Thread: 3/8-24, Thread Length: 21/32"

Product Image Gallery

Product code NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21
NAS517-4-21

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Customer Reviews

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Great product at a good price, fast delivery. Easy install, fired up perfectly right out of the box.

4.0

Great service, Shipping was only 2 days!

5.0

(Translated by Google) Excellent service, fast and courteous (Original) Excellent service , rapide et courtois

5.0

I am a retired AME/Pilot. I have been restoring a 1946 Globe Swift and have relied on the support and expertise provided by your sales staff. My experience has been very positive. In return, I buy everything I can from Military Fasteners. You are my preferred supplier. Thank you.

5.0