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 1875 ships same day if ordered before 4pm EST
NAS517-4-21 Price:
buy now
$1.94 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

Fastener Length: 1-13/64in., Thread: 3/8-24, Thread Length: 21/32in., 5305-00-207-1791

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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I was very pleased with the processing of my order from Military Fasteners. Placed my order very late on Thursday. Confirmation was immediate and received a tracking number the next day. It was delivered on the Monday. Excellent service from Military Fasteners

5.0

Enjoyed the order experience. Easy to find. Easy to order.

5.0

I recently had the pleasure of working with Military Fasteners and I couldn't be more satisfied with the experience. Trisha Hawkins provided exceptional customer service and went above and beyond to ensure I found exactly what I needed. The quality of the fasteners is top-notch and the delivery was prompt. I highly recommend Military Fasteners for their outstanding products and excellent service. Thank you, Trisha, for making the process so smooth and efficient!

5.0

I have only ordered from Military Fasteners once so far, but I can't even express how happy I was with our order. As a purchasing manager who deals with government contracts (and the strict requirements that come with them), I was beyond thrilled with the flawless paperwork that was provided (free of charge) with the products we ordered. Lindsey was a peach to interact with, and we received our order next day; one of the perks of having a warehouse close by. I am very much so looking forward to to ordering from them again! Response from the owner3 years ago Thank you so much Holly for the kind words. We constantly try and think of new ways to improve the experience for our customers. We strive to make the package presentation upon arrival how we would want as a customer. It truly is an honor to service our customers that support our government and military branches.

5.0