Externally Relieved Body Screw

20794-7

20794-7
(NSN) National Stock Number
5305-00-004-3159
Federal Supply Classification
5305 Screws
Item Name Code
01852
Schedule B Code
7318152000
Summary

2a thread class, right-hand thread direction, 0.203 inches minimum and 0.233 inches maximum thread length, 0.552 inches minimum and 0.572 inches maximum fastener length, pan head style, 0.205 inches minimum and 0.219 inches maximum head diameter

DAC HCC DMIL RNCC
1 - - 3
RNVC SADC MSDS RNAAC
2 - - ZZ
Identification

An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes:undercut for thread relief). It is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also bolt, externally relieved body and bolt, internal wrenching.

INC FIIG Concept Condition
01852 A003B0 - 1
Specifications
Thread Class
2a
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
0.203 inches minimum and 0.233 inches maximum
Details A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
Fastener Length
0.552 inches minimum and 0.572 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
pan
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
Head Diameter
0.205 inches minimum and 0.219 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
0.070 inches minimum and 0.080 inches maximum
Details A measurement from the bottom to the top of the head,in distinction from depth.
First Diameter From Head
0.085 inches minimum and 0.095 inches maximum
Details None.
Distance From Largest Bearing Surface Of Head To End Of First Diameter
0.339 inches minimum and 0.349 inches maximum
Details None.
Internal Drive Style
cross recess type 1
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
Nominal Thread Diameter
0.112 inches
Details The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
Thread Quantity Per Inch
40
Details The number of threads on the item per linear inch measured on a line parallel to the thread axis.
Externally Relieved Body Diameter Quantity
1
Details The number of externally relieved diameters on the body,adjacent to the head.
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 304l or steel comp 316l or steel comp 302 or steel comp 347 or steel comp 321 or steel comp 317 or steel comp 316 or steel comp 310 or steel comp 309 or steel comp 305 or steel comp 304 overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Material Document And Classification
qq-s-763 300 series cond a fed spec all material responses 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
passivate 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-35 type 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
unc
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.
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
ROCKWELL COLLINS, INC. DBA RC DISPLAYS SYSTEMS
CAGE: 09344
CEDAR RAPIDS , IA , 52498-0505
UNITED STATES
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FAQs
Frequently asked questions for NSN 5305-00-004-3159
What is the NIIN of the NSN 5305-00-004-3159?
The National Item Identification Number (NIIN) of the NSN 5305-00-004-3159 is 00-004-3159
When the NSN 5305-00-004-3159 was assigned to the Federal Catalog?
It was assigned 52 years ago, on Wed, Jun 7, 1972
Does the NSN 5305-00-004-3159 contain any precious metals?
Does not contain precious metal
Does the NSN 5305-00-004-3159 contain any hazardous material?
No data in HMIRS
What is the ESD classification of NSN 5305-00-004-3159?
No known electrostatic discharge

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