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PartsTable / COMPONENT / MS20392-4C83
MS20392-4C83 ✓ 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 PIN,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include height: 0.062 INCHES NOMINAL IN, diameter: 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN, material: STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL, head_style: PAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION), chamfer_length: 0.078 INCHES NOMINAL IN, hardness_rating: 26.5 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-903-5935, 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
MS20392-4C83
NSN: 5315-00-903-5935
FSC: 5315
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
height0.062 INCHES NOMINAL IN
diameter0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
materialSTEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
head_stylePAN NO. 2 (R1 NOT REQUIRED IN ITEM DESCRIPTION)
chamfer_length0.078 INCHES NOMINAL IN
hardness_rating26.5 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSTRAIGHT
pin_chamfer_angle15.0 DEGREES NOMINAL
pin_head_diameter0.437 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
under_head_length2.772 INCHES MINIMUM AND 2.792 INCHES MAXIMUM IN
first_hole_diameter0.096 INCHES MINIMUM AND 0.116 INCHES MAXIMUM IN
NSN5315-00-903-5935
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS20392-4C83 · 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
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
UNDER HEAD LENGTH: 2.772 INCHES MINIMUM AND 2.792 INCHES MAXIMUM IN
•
PIN HEAD DIAMETER: 0.437 INCHES NOMINAL IN
•
PIN CHAMFER ANGLE: 15.0 DEGREES NOMINAL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-8695 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
HOLE ARRANGEMENT STYLEONE END DRILLED
UNDER HEAD LENGTH2.772 INCHES MINIMUM AND 2.792 INCHES MAXIMUM IN
PIN HEAD DIAMETER0.437 INCHES NOMINAL IN
PIN CHAMFER ANGLE15.0 DEGREES NOMINAL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-8695 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
STYLE DESIGNATORSTRAIGHT
HEIGHT0.062 INCHES NOMINAL IN
HARDNESS RATING26.5 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
B1971Interchangeable
interchangeable cross-reference
interchangeable
308-37Interchangeable
interchangeable cross-reference
interchangeable
NASM5673Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS20392-4C83?
MS20392-4C83 is a PIN,STRAIGHT,HEADED.
What parts can replace MS20392-4C83?
There are 3 known substitutes for MS20392-4C83: B1971, 308-37, NASM5673. Substitute compatibility should be verified for your specific system.
What is the NSN for MS20392-4C83?
MS20392-4C83 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-903-5935. 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