MS9557-21

Military Standard Machine Bolt

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Description:

Fastener Length: 1-7/16", Thread: 1/4-28, Thread Length: 13/16",

* Manufacturer certifications are shipped with your order FREE of charge
MS9557-21
MS9557-21
MS9557-21
MS9557-21
Add to Cart Up to qty 30 ships same day if ordered before 4pm EST
MS9557-21 Price:
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$19.33 Each
Quantity:
Pre-packaged bag qty: 5 ea
* Sold in increments of 5
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MS9557-21 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.740 inches minimum and 0.820 inches maximum
Fastener Length:
1.428 inches minimum and 1.448 inches maximum
Head Style:
Double hexagon w/hole
Head Height:
0.290 inches minimum and 0.310 inches maximum
Width Between Flats:
0.313 inches nominal
Extended Washer Diameter:
0.428 inches minimum and 0.448 inches maximum
Extended Washer Thickness:
0.060 inches minimum
Thread Diameter:
0.250 inches
Grip Length:
0.628 inches minimum and 0.688 inches maximum
Features Provided:
Finished head
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
130000 pounds per square inch
Hardness Rating:
24.0 rockwell c minimum overall and 35.0 rockwell c maximum overall
Minimum Yield Strength:
85000 pounds per square inch
Surface Finish:
32.0 microinches bearing surface of head
Surface Finish:
32.0 microinches grip
Surface Finish:
32.0 microinches threads
Material:
Iron alloy 660 overall
Material Specification:
Ams 5731 assn std single material response overall
Thread Series Designator:
Unjf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Iron
Length 1-7/16

Additional Information

SKU / Model: MS955721
NSN: 5306-01-288-9338
FSC: Bolts / 5306
Product Series: MS9557
Pack Weight (Approx.) 0.131 lb
Minimum Qty (MOQ): 5
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
MS9557-21_Military-Fasteners-com.pdf
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Product code MS9557-21
MS9557-21
MS9557-21
MS9557-21
MS9557-21

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Great Website helped to identify the needed parts. The wide array of shipping options and costs helped minimize unnecessary expense. Parts arrived promptly. Thankyou

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

I have never gotten anything but the greatest, most prompt service from Military Fasteners.

4.0

You just cant find a place that does better than Military Fasteners, folks. Have done quite well here for many years. Many thanks guys

4.0