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NSN: 5310-00-001-1843
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Cross Reference

These part numbers have the same form, fit, and function of 123hm10019-511
Item Number Cage
123HM10019-511 26512

Characteristic Codes

123HM10019-511 spec. code meanings
Code Translation
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.
ACTA The style designation indicating the configuration that most nearly corresponds to the appearance of the nut.
AGGP The length of a straight line which passes through the center of a drilled hole, and terminates at the circumference.
ALET Indicates the type and number of holes provided.
ASDB The shortest straight line between flats, perpendicular to the height.
BZRR A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.
CMLP The number of threads on the item per linear inch measured on a line parallel to the thread axis.
CQJX A designation that is used for the purpose of general identification of the thread.
CRHC The style designation that most nearly corresponds to the appearance of the hole configuration.
CRSQ The included angle of the countersink.
CRTM Indicates the type of bearing surface.
CSXL Designates the specific roughness rating of the bearing surface, representing the arithmetic average deviation of the surface from the meanline in profile.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
MDCL The specification, standard, or manufacturers reference, and the classification designation, such as class, condition, temper, and the like, that identifies the 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.
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.


Description: Hexagon Plain Nut
Mfr. Cage 26512


Nut Height: 21/64", Width across flats: 2-15/64", Thread Size: 1-3/4", steel comp 410 overall

AAJD Thread Class
AAJF Thread Direction
ACTA Nut Style
ADEA Nut Height
From 0.328" and 0.358"
AGGP Drilled Hole Diameter
0.068 inches
ALET Hole Type And Quantity
3 drilled
ASDB Width Across Flats
From 2.222" and 2.252"
BZRR Thread Series
CMLP Thready Qty Per Inch (tpi)
CQJX Nominal Thread Size
1.750 inches
CRHC Hole Configuration Style
Configuration b
CRSQ Countersink Angle
120.0 degrees nut
CRTM Bearing Surface Type
CSXL Bearing Surface Finish
125.0 microinches
MATT Material
Steel comp 410
MDCL Material Spec
Ams 5612 assn std single material response
SFTT Surface Treatment
STDC Surface Treatment Spec
Qq-p-35 fed spec single treatment response

Technical Definition

Nut, Plain, Hexagon, also referenced with federal logistics item name code 01857 - A nut, flat on top and bottom having 6 flat sides. for items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. see also locknut, tube fitting. for items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
National Stock Number (NSN): 5310-00-001-1843

Last Modified: 02/14/2017