Close Tolerance Screw

MS21125B413

MS21125B413
(NSN) National Stock Number
5305-00-092-6682
Federal Supply Classification
5305 Screws
Item Name Code
29294
Schedule B Code
7318152000
Summary

3a thread class, right-hand thread direction, 0.278 inches minimum and 0.329 inches maximum thread length, 1.231 inches minimum and 1.251 inches maximum fastener length, flat chamfer head style, 0.477 inches minimum and 0.492 inches maximum head diameter

DAC HCC DMIL RNCC
E - - 3
RNVC SADC MSDS RNAAC
2 - - ZZ
Identification

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

INC FIIG Concept Condition
29294 A003B0 - 1
Specifications
Thread Class
3a
Details A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
Thread Direction
right-hand
Details 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.
Thread Length
0.278 inches minimum and 0.329 inches maximum
Details A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
Fastener Length
1.231 inches minimum and 1.251 inches maximum
Details 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.
Head Style
flat chamfer
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
Head Diameter
0.477 inches minimum and 0.492 inches maximum
Details The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
Head Height
0.126 inches minimum and 0.141 inches maximum
Details A measurement from the bottom to the top of the head,in distinction from depth.
Locking Feature
detent ball fastener
Details An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.
Grip Diameter
0.2487 inches minimum and 0.2492 inches maximum
Details The length of a straight line which passes through the center of the grip,and terminates at the circumference.
Shank Unthreaded Hole Diameter
0.076 inches minimum and 0.086 inches maximum first hole
Details The length of a straight line which passes through the center of the shank unthreaded hole,and terminates at the inside circumference.
Internal Drive Style
slot
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
Nominal Thread Diameter
0.250 inches
Details The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
Grip Length
0.812 inches minimum and 0.828 inches maximum
Details A measurement of the longest dimension of the grip,in distinction from width.
Thread Quantity Per Inch
28
Details The number of threads on the item per linear inch measured on a line parallel to the thread axis.
Distance From Head Largest Bearing Surface To Shank Hole Center
1.135 inches minimum and 1.155 inches maximum first hole
Details The distance from the shank hole centerline to the largest bearing surface of the head.
Surface Finish
32.0 microinches bearing surface of head
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
Surface Finish
32.0 microinches grip
Details Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.
Part Name Assigned By Controlling Agency
navy special project
Details The name assigned to the item by the government agency or commercial organization controlling the design of the item.
Material
steel comp xm-13 overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Material Document And Classification
ams 5629 assn std single material response overall
Details The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
CA2651-4-13 29372 5 - 5 9 - ZZ
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N A A -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
50600 - Q -
RVC WCC TCC SHC
- 713 Z 9

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Manufacturer
NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
CAGE: 80205
ARLINGTON , VA , 22209
UNITED STATES
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FAQs
Frequently asked questions for NSN 5305-00-092-6682
What is the NIIN of the NSN 5305-00-092-6682?
The National Item Identification Number (NIIN) of the NSN 5305-00-092-6682 is 00-092-6682
When the NSN 5305-00-092-6682 was assigned to the Federal Catalog?
It was assigned 51 years ago, on Sun, Dec 3, 1972
Does the NSN 5305-00-092-6682 contain any precious metals?
Does not contain precious metal
Does the NSN 5305-00-092-6682 contain any hazardous material?
No data in HMIRS
What is the ESD classification of NSN 5305-00-092-6682?
No known electrostatic discharge

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