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NSN: 5306-00-001-4829
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Part Numbers

Item Number Item Description
324071-1 Bolt, Shoulder

Master Requirement Codes

Code Translation
AASB 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.
CQFM A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
AASU A measurement from the bottom to the top of the head, in distinction from depth.
AASK The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
CQBC The maximum rated load in tension applied in a longitudinal direction, per unit of cross-sectional area, that the material can withstand without rupture.
AHYM The nominal length of a straight line which passes through the center of the threaded portion, and terminates at the circumference.
MDCL The specification, standard, or manufacturers reference, and the classification designation, such as class, condition, temper, and the like, that identifies the material.
AATN The length of a straight line which passes through the center of the shoulder and terminates at the circumference.
AATX The length of the enlarged portion of the shank on the item, in distinction from width or diameter.
CWYB The physical configuration of the unthreaded portion of a body adjacent to the head which is larger than the diameter of the shank.
AAJD A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
AAJF 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.
AASA A measurement of the extent of threads, including incomplete threads, along a line parallel to the longitudinal axis.
CMLP The number of threads on the item per linear inch measured on a line parallel to the thread axis.
THSD A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

324071-1 Shoulder Bolt

Cage 80020

Technical Definition

Bolt, Shoulder, also referenced with federal logistics item name code 04905 - An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. it has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. the head is not designed to be held or driven with an inserted drivers. a locking feature may be incorporated in the design of the head or threads. for items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. for items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. excludes thumbscrew.

Technical Characteristics

Fastener Length (AASB):
0.969 inches nominal
Hardness Rating (CQFM):
26.0 rockwell c minimum overall and 32.0 rockwell c maximum overall
Head Height (AASU):
0.390 inches minimum and 0.422 inches maximum
Head Style (AASK):
Hexagon
Material (MATT):
Steel comp 431 overall
Minimum Tensile Strength (CQBC):
125000 pounds per square inch
Nominal Thread Diameter (AHYM):
0.500 inches
Material Document And Classification (MDCL):
Mil-s-18732 mil spec single material response overall
Shoulder Diameter (AATN):
0.625 inches nominal first shoulder
Shoulder Length (AATX):
0.484 inches nominal first shoulder
Shoulder Shape (CWYB):
Round first shoulder
Width Between Flats (AATB):
1.053 inches minimum and 1.066 inches maximum
Thread Class (AAJD):
2a
Thread Direction (AAJF):
Right-hand
Thread Length (AASA):
0.485 inches minimum
Thread Quantity Per Inch (CMLP):
13
Thread Series Designator (THSD):
Unc

National Stock Number (NSN)

5306-00-001-4829