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Externally Relieved Body Screw

Model / MPN: E519078-5F11 | NSN: 5305-01-265-8952
ITAR Registered seal

An externally threaded fastener whose threaded portion is of one diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a diameter less than the pitch diameter of the thread (excludes undercut for thread relief). It is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also bolt, externally relieved body and bolt, internal wrenching.

Product Details
NATO Stock Number
Sold in multiples of
1 EA
Thread Class
Thread Direction
Thread Length
0.250 inches
Fastener Length
Between 0.735 inches and 0.765 inches
Head Style
Head Diameter
Between 0.155 inches and 0.167 inches
Head Height
Between 0.053 inches and 0.062 inches
First Diameter From Head
0.071 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
0.500 inches
Point Style
Internal Drive Style
Cross recess type 1
Thread Diameter
0.138 inches
Thready Qty Per Inch (tpi)
Min. Tensile Strength (psi)
80000 pounds per square inch
Externally Relieved Body Diameter Quantity
Black bearing surface of head
Steel comp 301 or steel comp 302 or steel comp 302b or steel comp 303 or steel comp 303se or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 308 or steel comp 309 or steel comp 309s or steel comp 310 or steel comp 310s or steel comp 314 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 347 or steel comp 348 or steel comp 384 or steel comp 385
Surface Treatment
Surface Treatment Specification
Mil-p-13924 class 4 military specification single treatment response
Thread Series Designator
E519078 Series Parts

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E519078-5F11 Cross Reference