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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I always receive my shipments from Military Fasteners quickly without having to follow up and track down shipments. West Coast shipments arrive usually the next day via UPS ground, making it an effective choice. Thank you for excellent service.

4.0

I recently requested a quote and placed an order with Kristen Belmont. Kristen was incredibly helpful, prompt, and informative, addressing all of my inquiries and requests efficiently. I am extremely grateful to have had Kristen's assistance.

5.0

Alternator was in stock, shipped same day, arrived quickly (even though I chose standard shipping during the height of the Christmas rush), packed well and at a good price. Well done, Military Fasteners, well done!

4.0

Easy catalogue to find things. Battery fit perfect. Legal again for another two years. Delivered sooner than promised!

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