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PartsTable / COMPONENT / ES8377-09
ES8377-09 ✓ Verified by PartsTable
— · 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

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303S OR STEEL COMP 303SE OVERALL, nut_style: KNURLED, knurl_width: 0.156 INCHES NOMINAL IN, nut_diameter: 0.531 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.437 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-957-1224, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
ES8377-09
NSN: 5310-00-957-1224
FSC: 5310
CAGE: 20418 — DRS SUSTAINMENT SYSTEMS, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 303S OR STEEL COMP 303SE OVERALL
nut_styleKNURLED
knurl_width0.156 INCHES NOMINAL IN
nut_diameter0.531 INCHES NOMINAL IN
thread_class2B
nut_thickness0.437 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
small_end_diameter0.281 INCHES NOMINAL IN
nominal_thread_size0.138 INCHES IN
thread_quantity_per_inch32
NSN5310-00-957-1224
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ES8377-09 · OEM ⚠ 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
NUT DIAMETER: 0.531 INCHES NOMINAL IN
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL COMP 303S OR STEEL COMP 303SE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL
NUT DIAMETER0.531 INCHES NOMINAL IN
THREAD CLASS2B
THREAD QUANTITY PER INCH32
NOMINAL THREAD SIZE0.138 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL COMP 303S OR STEEL COMP 303SE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
KNURL WIDTH0.156 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
4074Interchangeable
interchangeable cross-reference
interchangeable
995-1A33R0JInterchangeable
interchangeable cross-reference
interchangeable
995-1A330HMInterchangeable
interchangeable cross-reference
interchangeable
95G3244Interchangeable
interchangeable cross-reference
interchangeable
DMS 81051BInterchangeable
interchangeable cross-reference
interchangeable
E121211Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ES8377-09?
ES8377-09 is a NUT,PLAIN,KNURLED.
What parts can replace ES8377-09?
There are 20 known substitutes for ES8377-09: 4074, 995-1A33R0J, 995-1A330HM and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ES8377-09?
ES8377-09 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-957-1224. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026