Close Tolerance Screw
CA4520-4-13
(NSN) National Stock Number
5305-00-121-8885
Federal Supply Classification
5305 Screws
Item Name Code
29294
Schedule B Code
7318152000
Summary
3a thread class, right-hand thread direction, 0.283 inches minimum and 0.334 inches maximum thread length, 1.231 inches minimum and 1.251 inches maximum fastener length, flat countersunk head style, 0.449 inches minimum and 0.507 inches maximum head diameter
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 5 | - | - | 5 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 9 | - | - | KZ |
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
0.283 inches minimum and 0.334 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 countersunk
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.Head Diameter
0.449 inches minimum and 0.507 inches maximum
Details
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.Locking Feature
detent ball grip
Details
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.Grip Diameter
0.2483 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 first hole 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
high-torque
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.Hardness Rating
36.0 rockwell c minimum overall and 41.0 rockwell c maximum overall
Details
A numeric value that reflects the hardness of an item when used in conjunction with a hardness rating scale.Countersink Angle
100.0 degrees nominal
Details
The included angle of the countersink.Distance From Head Largest Bearing Surface To Shank Hole Center
1.131 inches minimum first hole and 1.161 inches maximum first hole
Details
The distance from the shank hole centerline to the largest bearing surface of the head.Surface Finish
63.0 microinches grip
Details
Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.Surface Finish
63.0 microinches top of head
Details
Designates the specific surface roughness rating,representing the arithmetic average deviation of the surface from the meanline in profile.Material
steel overall
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material Document And Classification
mil-b-83050 mil spec 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.Surface Treatment
cadmium overall and chromate overall
Details
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.Surface Treatment Document And Classification
qq-p-416 ty 2 cl 2 fed spec single treatment response overall
Details
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.Thread Series Designator
unjf
Details
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.Master-Cross Reference List
| Part | CAGE | DAC | HCC | RNCC | RNVC | MSDS | RNAAC |
|---|---|---|---|---|---|---|---|
| AS195-4-13 | 84256 | 5 | - | 5 | 2 | - | KZ |
| 106466-4-13 | 80539 | 5 | - | 5 | 2 | - | KZ |
| MS27577-4-13 | 80205 | 4 | - | 3 | 2 | - | ZZ |
| MS27577-4-13 | 96906 | 4 | - | 5 | 9 | - | SE |
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
| HMIC | PMIC | ESD/EMI | Criticality |
|---|---|---|---|
| N | A | - | - |
Freight
Universal / National Freight and Handling Information
| UFC | HMC | LTL | LCL |
|---|---|---|---|
| 48950 | - | W | - |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 713 | Z | 9 |
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Manufacturer
HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS
CAGE: 29372
TORRANCE
, CA
, 90505-5103
UNITED STATES
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FAQs
Frequently asked questions for NSN 5305-00-121-8885
What is the NIIN of the NSN 5305-00-121-8885?
The National Item Identification Number (NIIN) of the NSN 5305-00-121-8885 is 00-121-8885
When the NSN 5305-00-121-8885 was assigned to the Federal Catalog?
It was assigned 56 years ago, on Fri, Oct 25, 1968
Does the NSN 5305-00-121-8885 contain any precious metals?
Does not contain precious metal
Does the NSN 5305-00-121-8885 contain any hazardous material?
No data in HMIRS
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