Close Tolerance Screw

A51G20551-13

A51G20551-13
(NSN) National Stock Number
5305-00-004-2985
Federal Supply Classification
5305 Screws
Item Name Code
29294
Schedule B Code
8109900000
Summary

3a thread class, right-hand thread direction, 0.426 inches maximum thread length, 1.113 inches nominal fastener length, 0.2485 inches minimum and 0.2495 inches maximum grip diameter, high-torque internal drive style

DAC HCC DMIL RNCC
4 - - C
RNVC SADC MSDS RNAAC
1 9X - 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
0.426 inches maximum
Details A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
Fastener Length
1.113 inches nominal
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.
Grip Diameter
0.2485 inches minimum and 0.2495 inches maximum
Details The length of a straight line which passes through the center of the grip,and terminates at the 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
0.687 inches nominal
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.
Material
titanium alloy overall
Details The chemical compound or mechanical mixture properties of which the item is fabricated.
Thread Series Designator
unf
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
A51G20551-11 79RG9 1 - C 1 - ZZ
A51G20551-11 61174 1 - 5 9 - KE
A51G20551-13 61174 4 - 3 9 - KZ
A51G20551-11 26512 1 - 5 9 - KE
A51G20551-13 26512 4 - 5 9 - KZ
A51G20551-13 65777 5 - 5 2 - ZZ
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N U - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
68455 - W -
RVC WCC TCC SHC
- 576 Z 9

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Manufacturer
NORTHROP GRUMMAN SYSTEMS CORPORATION
CAGE: 79RG9
JACKSONVILLE , FL , 32221-8130
UNITED STATES
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FAQs
Frequently asked questions for NSN 5305-00-004-2985
What is the NIIN of the NSN 5305-00-004-2985?
The National Item Identification Number (NIIN) of the NSN 5305-00-004-2985 is 00-004-2985
When the NSN 5305-00-004-2985 was assigned to the Federal Catalog?
It was assigned 52 years ago, on Wed, Jun 7, 1972
Does the NSN 5305-00-004-2985 contain any precious metals?
Type/content is unknown
Does the NSN 5305-00-004-2985 contain any hazardous material?
No data in HMIRS

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