Spend $150 or more and get free ground shipping in the U.S.
Call 1 (904) 543-6395 or Email Us
email this page 

MS20004-20 Military Standard Internal Wrenching Bolt

Length: 1-3/4", grip: 1-1/4", thread: 1/4-28, internal wrenching, cadmium plated alloy steel

Manufacturer certifications are shipped with your order FREE of charge


Add to Cart Available Quantity: 75

MS20004-20 Price: $4.75 /Each
* Sold in increments of 5

MS20004-20 Spec.

Fastener Length:
Between 1.735 inches and 1.765 inches
Hardness Rating:
34.0 rockwell c and 40.0 rockwell c
Head Diameter:
Between 0.428 inches and 0.438 inches
Head Height:
0.250 inches
Head Style:
Steel comp 4140 or steel comp e4340 or steel comp 6150 or steel comp 8735 or steel comp 8740
Min. Tensile Strength (psi):
160000 pounds per square inch
Thread Diameter:
0.250 inches
Internal Drive Style:
Material Specification:
Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-8503 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6049 military specification 5th material response
Width Across Flats:
Between 0.188 inches and 0.190 inches
Surface Treatment Specification:
Qq-p-416 type 2 class 3 federal specification all treatment responses
Surface Treatment:
Cadmium and chromate
Thread Class:
Thread Direction:
Thread Length:
Between 0.475 inches and 0.525 inches
Thready Qty Per Inch (tpi):
Thread Series Designator:
Unf (fine thread)

Additional Information MS20004 20

Found In: MS Series Bolts
Gov. Issued Name: Bolt, Internal Wrenching
NSN: 5306-00-638-7737
FSC: Bolts / 5306
Schedule B: 7318.15.2000, Bolts and bolts and their nuts or washers exported in the same shipment
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
PDF: MS20004-20 Spec.pdf