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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Well I used Military Fasteners for this order because they are close to me in florida.

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Quality products, outstanding service, good prices!

5.0

military fasteners Team, I am very pleased with the way my orders have been taken care of these past few years. Your CSRs are so helpful and attentive to my project details. The military fasteners team really go out of their way to accommodate special requests. Always a pleasant experience, Thank you military fasteners Team

5.0

Order was placed with ease, confirmation received in minutes, delivery by UPS ground in one day. Reasonable price, easy installation. Great service as always.

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