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Technical Data Sheet
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540-030 — HINGE BLOCK,WELDING SHIELD,DIVER

✓ Government record, cited
LevelOne · NUT WASHER
PRODUCT OVERVIEW

540-030: HINGE BLOCK,WELDING SHIELD,DIVER.

Fast and easy connection with USB The LevelOne USB Hub and Gigabit Ethernet Combo Adapter allows you to connect to the internet easily through the built-in USB port on your laptop. Now you no longer need to have an Ethernet connection in order to surf the web. This is an ideal solution for MacBook or other Windows computers that may have wireless built-in but don’t come with an Ethernet port.

Sometimes you need to physically connect to a network cable to help transfer files or access secure information. The USB-0503 easily does the job, all through your USB port. The USB-0503 also combines a regular USB hub.

So you can connect external USB peripherals, such as a MP3 player, digital camera, printer or pen drive. The USB-0503 establishes a direct point-to-point contact between the hub and the adapter that\\\'s plugged into your PC. Reliable, efficient and standards compliant The USB-0503 is USB 1.0, 2.0, and 3.0 compliant.

It also follows the Ethernet standards This part is cataloged in the U.S. Government catalog under NSN 5310-00-402-5855, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
540-030
NSN: 5310-00-402-5855
NIINs: 004025855, 008099559, 009411129, 016085013, 016210244
FSC: 5310 — Nuts and Washers
CAGE: 08136 — BE WALLACE PRODUCTS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.375 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
end_item_identification4940-01-601-1928,SHOP EQUIPMENT,METAL WORKING
thread_quantity_per_inch14
NSN5310-00-402-5855
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 540-030 · LevelOne ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
NUT HEIGHT: 0.375 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
NUT HEIGHT0.375 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH14
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
54-1054Reference document
Same NSN cross-reference
Reference document — Secondary reference
1054Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 540-030?
540-030 is a HINGE BLOCK,WELDING SHIELD,DIVER manufactured by LevelOne.
What parts can replace 540-030?
There are 2 known substitutes for 540-030: 54-1054, 1054. Substitute compatibility should be verified for your specific system.
What is the NSN for 540-030?
540-030 is cataloged in the U.S. Government catalog under NSN 5310-00-402-5855. This indicates validated use in U.S. government and defense supply chains.
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