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Part Numbers

Item Number Item Description
123CM13229-511 Nut, Plain, Round

Master Requirement Codes

Code Translation
CQFM A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
CQJX A designation that is used for the purpose of general identification of the thread.
MDCL The specification, standard, or manufacturers reference, and the classification designation, such as class, condition, temper, and the like, that identifies the material.
STDC The specification, standard, or manufacturers reference, and the classification designation, such as type, class, grade, and the like, that identifies the surface treatment material.
SFTT 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.
TEST The specification, standard, drawing, or similar instrument that specifies environmental and performance requirements or test conditions under which an item is tested and establishes acceptable limits within which the item must conform identified by an alphabetic and/or numeric reference number. includes the commercial and government entity (cage) code of the entity controlling the instrument.
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.
CMLP The number of threads on the item per linear inch measured on a line parallel to the thread axis.
BZRR A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.

123CM13229-511 Round Plain Nut

Cage 26512

Technical Definition

Nut, Plain, Round, also referenced with federal logistics item name code 15887 - A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. for items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. see also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Technical Characteristics

Hardness Rating (CQFM):
39.0 rockwell c minimum and 45.0 rockwell c maximum
Material (MATT):
Steel comp 310 overall
Nominal Thread Size (CQJX):
0.750 inches
Material Document And Classification (MDCL):
Ams5612 assn std single material response overall
Surface Treatment Document And Classification (STDC):
Qq-p-35 fed spec single treatment response overall
Surface Treatment (SFTT):
Passivate overall
Test Data Document (TEST):
81349-mil-i-6868 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.).
Thread Class (AAJD):
Thread Direction (AAJF):
Thread Quantity Per Inch (CMLP):
Thread Series (BZRR):

National Stock Number (NSN)