PartsTable
Technical Data Sheet
120377 ✓ Verified by PartsTable
Zyxel · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

<b>Connectivity Service<br>Secure WiFi</b><br><br><b>Secure WiFi</b><br>Enforcing Best Practice<br>Security for Work-From-Home<br><br>Same Security Across Networks<br>Businesses striking a balance on productivity and security protection becomes a priority with growing number of devices. Whether it is a wired, wireless, or a IoT device, the Secure WiFi service ensures the same network controls which can be applied to headquarters and other remote workplaces. Easily and securely extend working experience as if you were in the office with the adoption of secure tunneling and strict two-factor authentication.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-0377, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
120377
NSN: 5310-00-012-0377
FSC: 5310
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
hardness_rating95.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
end_item_identificationMRAP BUFFALO MK2A2; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); HIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS)
NSN5310-00-012-0377
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 120377 · Zyxel ⚠ 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
THREAD DIRECTION: RIGHT-HAND
NUT HEIGHT: 0.328 INCHES NOMINAL IN
NOMINAL THREAD SIZE: 0.375 INCHES IN
THREAD QUANTITY PER INCH: 16
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS: 0.562 INCHES NOMINAL IN
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.328 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD QUANTITY PER INCH16
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS0.562 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMRAP - MAXXPRO DASH ISS W/OGPK AND W/CROWS
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
SURFACE TREATMENTCADMIUM OR ZINC AND CHROMATE OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
120377Interchangeable
interchangeable cross-reference
interchangeable
MS35690-622Interchangeable
interchangeable cross-reference
interchangeable
5310000171544Interchangeable
interchangeable cross-reference
interchangeable
6502-3198192PC10Interchangeable
interchangeable cross-reference
interchangeable
77M1L8TInterchangeable
interchangeable cross-reference
interchangeable
920733Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 120377?
120377 is a NUT,PLAIN,HEXAGON manufactured by Zyxel.
What parts can replace 120377?
There are 32 known substitutes for 120377: 120377, MS35690-622, 5310000171544 and 29 more. Substitute compatibility should be verified for your specific system.
Is 120377 still available?
120377 is currently cancelled.
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