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Part Numbers

Item Number Item Description
NAS674V19H Bolt, Close Tolerance

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.
AAUR The length of a straight line which passes through the center of the grip, and terminates at the circumference.
ANEE A measurement of the longest dimension of the grip, in distinction from width.
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.
CRHC The style designation that most nearly corresponds to the appearance of the hole configuration.
AAUB The length of a straight line which passes through the center of a hole, and terminates at the circumference.
ASXK The number of holes provided.
BQDM Indicates the type of hole(s) provided in the item.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
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.
ZZZK The document designator of the specification or standard which established the item of supply.
CSYM Designates the specific surface roughness rating, representing the arithmetic average deviation of the surface from the meanline in profile.
CSYM Designates the specific surface roughness rating, representing the arithmetic average deviation of the surface from the meanline in profile.
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.

NAS674V19H Close Tolerance Bolt

Cage 80205

Technical Definition

Bolt, Close Tolerance, also referenced with federal logistics item name code 27851 - An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. the head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. for items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. for items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

Technical Characteristics

Fastener Length (AASB):
1.598 inches minimum and 1.628 inches maximum
Grip Diameter (AAUR):
0.2490 inches minimum and 0.2495 inches maximum
Grip Length (ANEE):
1.178 inches minimum and 1.198 inches maximum
Head Height (AASU):
0.125 inches minimum and 0.140 inches maximum
Head Style (AASK):
Hexagon
Hole Configuration Style (CRHC):
Hexagon corners
Hole Diameter (AAUB):
0.046 inches nominal
Hole Quantity (ASXK):
3
Hole Type (BQDM):
Drilled
Material (MATT):
Titanium alloy uns r56400 overall
Nominal Thread Diameter (AHYM):
0.250 inches
Material Document And Classification (MDCL):
Ams4967 assn std single material response overall
Specification/standard Data (ZZZK):
80205-nas674 professional/industrial association standard
Width Between Flats (AATB):
0.430 inches minimum and 0.439 inches maximum
Surface Finish (CSYM):
16.0 microinches threads
Surface Finish (CSYM):
63.0 microinches grip
Thread Class (AAJD):
3a
Thread Direction (AAJF):
Right-hand
Thread Length (AASA):
0.400 inches minimum and 0.450 inches maximum
Thread Quantity Per Inch (CMLP):
28
Thread Series Designator (THSD):
Unjf

National Stock Number (NSN)

5306-00-001-4883