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Technical Data Sheet
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120377 — NUT,PLAIN,HEXAGON

✓ Government record, cited
Zyxel · NUT WASHER
PRODUCT OVERVIEW

120377: NUT,PLAIN,HEXAGON.

Connectivity Service Secure WiFi Secure WiFi Enforcing Best Practice Security for Work-From-Home Same Security Across Networks 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 U.S. Government catalog 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
NIINs: 000120377, 000171544, 007320558, 015564488
FSC: 5310 — Nuts and Washers
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
•
WIDTH ACROSS FLATS: 0.562 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
NUT HEIGHT: 0.328 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OR ZINC AND CHROMATE OVERALL
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.562 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT HEIGHT0.328 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC AND CHROMATE OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
END ITEM IDENTIFICATIONMRAP - MAXXPRO DASH ISS W/OGPK AND W/CROWS
THREAD QUANTITY PER INCH16
SUBSTITUTES & CROSS-REFERENCES 8
3N177PC102Reference document
Same NSN cross-reference
Reference document — Secondary reference
3N135PC102Reference document
Same NSN cross-reference
Reference document — Secondary reference
9711Reference document
Same NSN cross-reference
Reference document — Secondary reference
1121495Reference document
Same NSN cross-reference
Reference document — Secondary reference
901613K1Reference document
Same NSN cross-reference
Reference document — Secondary reference
HEXNUTReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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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 8 known substitutes for 120377: 3N177PC102, 3N135PC102, 9711 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 120377?
120377 is cataloged in the U.S. Government catalog under NSN 5310-00-012-0377. This indicates validated use in U.S. government and defense supply chains.
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