MS9557-20

Military Standard Machine Bolt

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Description:

Fastener Length: 1-3/8", Thread: 1/4-28, Thread Length: 47/64", MS9557 series bolt

* Manufacturer certifications are shipped with your order FREE of charge
MS9557-20
MS9557-20
MS9557-20
MS9557-20
Add to Cart Up to qty 420 ships same day if ordered before 4pm EST
MS9557-20 Price:
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$6.24 Each
Quantity:
Pre-packaged bag qty: 10 ea
* Sold in increments of 10
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MS9557-20 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.720 inches minimum and 0.740 inches maximum
Fastener Length:
1.365 inches minimum and 1.385 inches maximum
Head Style:
Double hexagon w/hole
Head Height:
0.290 inches minimum and 0.310 inches maximum
Width Between Flats:
0.311 inches minimum and 0.313 inches maximum
Extended Washer Diameter:
0.428 inches minimum and 0.448 inches maximum
Extended Washer Thickness:
0.050 inches minimum and 0.070 inches maximum
Thread Diameter:
0.250 inches
Grip Length:
0.565 inches minimum and 0.625 inches maximum
Features Provided:
Finished head
Thready Qty Per Inch (tpi):
28
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
Thread Series Designator:
Unjf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Iron
Length 1-3/8

Additional Information

SKU / Model: MS955720
NSN: 5306-01-056-3506
FSC: Bolts / 5306
Product Series: MS9557
Pack Weight (Approx.) 0.250 lb
Minimum Qty (MOQ): 10
Schedule B: 7318.15.8085
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
MS9557-20_Military-Fasteners-com.pdf
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Product code MS9557-20
MS9557-20
MS9557-20
MS9557-20
MS9557-20

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Customer Reviews

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Have to tell you that you have the best in Brittany Cornish. She is always the most help in getting our ordered placed as soon as we send it in and always on time delivery. She is very responsive with any and all issues if any which we never have any dealing with her. She always goes above and beyond to follow up even after we received our order. We only wish all of our Vendors that we deal with on a daily basis were as wonderful as she is. Her personality is bar none.

5.0

Hard to find bolts are never hard to find with Military Fasteners!

5.0

Another good experience with Military Fasteners, and our Sales Rep, Dan Hunter. We needed hardware for an older aircraft model, and Dan's expertise was exceptional. He quickly identified fasteners, even for parts with unclear descriptions, and provided invaluable technical assistance. The supporting data was spot-on, verified by our technicians. Despite finding slightly lower prices elsewhere, the unmatched service and expertise from Military Fasteners, particularly Dan, make them our preferred choice. Our order was delivered ahead of schedule. Highly recommend MilFast for top-notch service and technical support!

5.0

Great supplier, great products, great prices. Trisha Hawkins hooked us up with the bolts we needed in a very efficient and friendly manner.

5.0