Model: 55-242

Hexagon Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque with nonmetallic insert

Lubrication

Soluble lubricant

Nut Style

Hexagon

Nut Height

Between 0.271 inches and 0.360 inches

Width Across Flats

Between 0.492 inches and 0.502 inches

Tempurature Rating

250.0 degrees fahrenheit

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Thread Size

0.312 inches

Countersink Angle

88.0 degrees nut

Bearing Surface Type

Chamfered or washer faced

Bearing Surface Finish

125.0 microinches

Material

Steel comp 1006 nut or steel comp 1008 nut or steel comp 1009 nut or steel comp 1010 nut or steel comp 1015 nut or steel comp 1018 nut or steel comp 1035 nut or steel comp 11l37 nut or steel comp 1213 nut or steel comp 12l14 nut

Surface Treatment

Cadmium nut and chromate nut

Surface Treatment Specification

Qq-p-416, type 2, cl 3 federal specification single treatment response except insert

NSN

5310-00-088-0553

Part Number

55-242

Description

Nut,self-locking,hexagon

CAGE

27235

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part 55-242 NSN 5310-00-088-0553

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05277

FIIG:

A021A0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

1.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

TCC:

SHC:

ACC:

Construction Materials

End Items End applications NSN 5310-00-088-0553 is a component of

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Aircraft Elevators
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B-1b Aircraft Trainer
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Electrical-electronic Test Equipment Plug-in Unit
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Linear Electro-mechanical Actuator
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Fork Lift Truck
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Electronic Equipment Installation Kit
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Radar Transmitter
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Trailer Mounted Electric Power Plant
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Guided Missile Maintenance Platform
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Air Conditioner
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Vehicular Hydraulic Transmission
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Measuring System As
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Tank Truck
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Truck Tractor
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Guided Missile System Components Test Station
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Utility Truck
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Transponder Set Test Set
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Rotary Wing Blade
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Key Distribution Ce
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Aircraft Cargo Loading-unloading Truck
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Release Assy
011358875
Crosswind Steering
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Butterfly Valve
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Radio Teletypewriter Set
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Butterfly Valve
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Butterfly Valve
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Signal Generator
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Signal Generator
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Power Supply Subassembly
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Noise Level Meter
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Acft Chemical Tank
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Hydraulic System Components Test Stand
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Speech Equipment
013613888
Line Termination Unit
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Groove Pulley
009570439
Sweep Generator
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Counterbalance Weight
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Linear Mechanical Actuator
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Cargo Carrier
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Valve Assembly
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Oscilloscope
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Mechanical Drive Housing
007385878
Webbing Strap
012821099
Air Conditioner
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Utility Truck
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Butterfly Valve
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Butterfly Valve
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Line Termination Unit
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Chemical Stora Tank
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Power Supply
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Aerial Delivery Cargo Bag
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Butterfly Valve
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Low Speed Full Tracked Tractor
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Se Floor Latch Assy
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Multimeter
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Air Conditioner
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Utility Truck
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Radar Signal Simulator
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Engine And Containe
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Full Tracked Recovery Vehicle
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Telegraph Terminal
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Utility Truck
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Cargo Carrier
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Attack Helicopter
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Full Tracked Recovery Vehicle
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Full Tracked Recovery Vehicle
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Attack Helicopter
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Decade Resistor
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Transmission With C
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Ambulance Truck
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Cargo Carrier
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Utility Truck
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Full Tracked Recovery Vehicle
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Full Tracked Recovery Vehicle
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Full Tracked Recovery Vehicle
004396242
Full Tracked Recovery Vehicle
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Full Tracked Recovery Vehicle
009857574
Distribution Box
001226826
Full Tracked Recovery Vehicle
012114122
Communicat Terminal
001226826
Full Tracked Recovery Vehicle
013808290
Ambulance Truck
001226826
Full Tracked Recovery Vehicle
011934998
Air Conditioner
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Full Tracked Recovery Vehicle
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Full Tracked Recovery Vehicle
013260710
Commu Switching Set
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Full Tracked Recovery Vehicle
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Full Tracked Recovery Vehicle
011467187
Utility Truck
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Transportable Electronic Shop
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Diesel Engine Generator Set
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Manual Telephone Switchboard
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Radio Set
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Telephone Set
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Attack Helicopter
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Voltmeter
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Full Tracked Recovery Vehicle
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Full Tracked Personnel Carrier
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Radio Teletyp Modem
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Power Supply
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Utility Truck
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Sound Reco Test Set
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Utility Truck
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Ambulance Truck
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Teletypewriter
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Fork Lift Truck
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Teletypewriter
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Signal Generator
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Nonexpandable Shelter
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Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
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Digital Computer
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Engine With Contain
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Voice Terminal
007951797
Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
008028718
Distortion Indicator
007951797
Full Tracked Combat Engineer Vehicle
013719580
Utility Truck
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Signal Generator
007951797
Full Tracked Combat Engineer Vehicle
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Full Tracked Combat Engineer Vehicle
007951797
Full Tracked Combat Engineer Vehicle
011035641
Air-antitank Defense Missile System Carrier
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Low Speed Full Tracked Tractor
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Attack Helicopter
005661917
Ignition Exciter
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Communicati Central
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Aerial Delivery Cargo Sling
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Digital Voltmeter
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Air Conditioner
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Utility Truck
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Mechanical Smoke Generator
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Semitrailer Mounted Electric Power Plant
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Utility Truck
012466826
Telephone Set
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Trailer Mounted Diesel Engine Generator Set
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Aircraft Stiffener Rib
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Portable Duct Type Heater
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Ambulance Truck
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Liquid Argon-nitrogen-oxygen Storage Tank
000677572
Portable Duct Type Heater
000177919
Airfoil Rib
013719578
Utility Truck
000443228
Digital Readout Electronic Counter
008688352
Signal Generator
011077153
Utility Truck
010595788
Aerial Delivery Cargo Capsule
000916596
Actuator-hydraulic-
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Tank Truck
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Ambulance Truck
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Aerial Delivery Cargo Bag
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Guided Missile Electrical Cable Puller
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Radio Receiver-transmitter
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Aircraft Cargo Rail Assembly
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Reciprocating Compressor Unit
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Aircraft Cargo Rail Assembly
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Aircraft Cargo Rail Assembly
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Utility Truck
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Reciprocating Compressor Unit
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Linear Electro-mechanical Actuator
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Engine Shipping And Storage Container
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Utility Truck
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Aircraft Mounted Winch
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Digital Readout Electronic Counter
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Retractable Landing Gear
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Aircraft Bomb Rack
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Linear Actuating Cylinder Assembly
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Supp Brace Assembly
002558555
Aircraft Cargo Rail Assembly
012266790
Power Transformer
013971074
Vehicular Hydraulic Transmission
002592542
Aircraft Cargo Rail Assembly
004568652
C Coordinating Unit
004115442
Air Conditioner
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Mine Dispenser
010708908
Electronic Equipment Installation Kit
010708908
Electronic Equipment Installation Kit
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Portable Duct Type Heater
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Telephone Set
012484760
004918007
Bomb Conversion Kit
011491353
Diesel Engine
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Air Conditioner
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Utility Truck
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Liquid Argon-nitrogen-oxygen Storage Tank
006165159
Aircraft Seat
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Utility Truck
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Self-propelled Medium Howitzer
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Semiconductor Device Test Set
006572093
Manifold Valve Assembly
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Self-propelled Medium Howitzer
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Attack Helicopter
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Attack Helicopter
012503719
Air Conditioner
006850300
Aircraft Seat
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Air Conditioner
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Self-propelled Medium Howitzer
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Self-propelled Medium Howitzer
007745556
Electrical Equipment Rack
004115444
Air Conditioner
010883669
Cargo-transport Helicopter
011077155
Utility Truck
006165160
Aircraft Seat
008399777
Movable Canopy
010714343
Electronic Equipment Installation Kit
006320102
Survival Test Stand
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Power Supply Test Set
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Cargo-transport Helicopter
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Portable Duct Type Heater
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Diesel Engine Generator Set
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Cargo-transport Helicopter
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Aircraft Gas Turbine Engine Component Mounting Plate
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Reeling Mechanism
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Aircraft Seat
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Cargo-transport Helicopter
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Reciprocating Compressor Unit
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Cargo-transport Helicopter
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Utility Truck
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Instrumen Turntable
008237732
Transportable Shelter Lift Dolly Set
011362214
Air Conditioner
007930650
Manometer Assembly
010117492
Instrumen Turntable
013808225
Ambulance Truck
011467193
Utility Truck
009393581
Mechanical Drive Housing
010117492
Instrumen Turntable
010032540
Aircraft Fuel Tank
010708906
Electronic Equipment Installation Kit
010117492
Instrumen Turntable
013719582
Utility Truck
010653748
Aerial Delivery Cargo Bag
010628194
Communicat Terminal
013498064
Communications Central
004244370
Electrical Pulse Analyzer
010117492
Instrumen Turntable
009881713
Alternating Current Generator
004319339
Electrical-electronic Test Equipment Plug-in Unit
009896759
Alternating Current Generator
010214096
Diesel Engine Generator Set
009377690
Power Supply
011069519
Attack Helicopter
010046550
Aerial Stores Lift Truck
007989786
Linear Actuating Cylinder Assembly
011069519
Attack Helicopter
007385879
Webbing Strap
013498078
Signal Data Converter
010656026
G And C Co Test Set

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Schedule B and Export

Schedule B: 7318160000
SITC: 69421
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Nuts of iron or steel