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Head plain or knurled is acceptable; see sheet 2 of nasm51975
MRC:
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.AAJD
Thread Class:
3a
MRC:
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.AAJF
Thread Direction:
Right-hand
MRC:
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.AASA
Thread Length:
Between 0.413 inches and 0.438 inches
MRC:
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.AASB
Fastener Length:
1.063 inches
MRC:
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.AASK
Head Style:
Knurled no. 1
MRC:
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.AASL
Head Diameter:
Between 0.419 inches and 0.438 inches
MRC:
A measurement from the bottom to the top of the head,in distinction from depth.AASU
Head Height:
Between 0.209 inches and 0.219 inches
MRC:
The length of a straight line which passes through the center of the shoulder and terminates at the circumference.AATN
Shoulder Diameter:
0.308 inches all shoulders and 0.310 inches all shoulders
MRC:
The length of the enlarged portion of the shank on the item,in distinction from width or diameter.AATX
Shoulder Length:
0.625 inches all shoulders
MRC:
The shortest distance from one flatted surface of the shoulder to the opposite flatted surface.AAVJ
Shoulder Width Across Flats:
0.093 inches all shoulders
MRC:
The minimum load,applied perpendicularly to the longitudinal axis of an item,at which point the item will fracture when subjected to the standard single shear test method.AAWU
Single Shear Strength:
840000 pounds per square inch
MRC:
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.ABQZ
Internal Drive Style:
Hexagon
MRC:
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.AHYM
Thread Diameter:
0.312 inches
MRC:
The shortest straight line between flats,perpendicular to the height.ASDB
Width Across Flats:
0.156 inches
MRC:
The number of threads on the item per linear inch measured on a line parallel to the thread axis.CMLP
Thready Qty Per Inch (tpi):
20
MRC:
The maximum rated load in tension applied in a longitudinal direction,per unit of cross-sectional area,that the material can withstand without rupture.CQBC
Min. Tensile Strength (psi):
140000 pounds per square inch
MRC:
The physical configuration of the unthreaded portion of a body adjacent to the head which is larger than the diameter of the shank.CWYB
Shoulder Shape:
Round all shoulders
MRC:
A characteristic of light that can be specified in terms of luminance,dominant wavelength,and purity.HUES
Color:
Bronze or olive drab
MRC:
The chemical compound or mechanical mixture properties of which the item is fabricated.MATT
Material:
Steel
MRC:
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.SFTT
Surface Treatment:
Cadmium
MRC:
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.STDC
Surface Treatment Specification:
Qq-p-416, typeii, class2 federal specification 1st treatment response
MRC:
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.THSD
Thread Series Designator:
Unc
