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PartsTable / COMPONENT / DISC FORM 650
DISC FORM 650 ✓ 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,ROUND is a the manufacturer industrial component. Key specifications include diameter: 0.3751 INCHES MINIMUM AND 0.3753 INCHES MAXIMUM IN, material: STEEL COMP 4140 OVERALL, nut_style: ROUND, nut_diameter: 0.250 INCHES NOMINAL IN, recess_angle: 90.000 DEGREES NOMINAL, shank_length: 0.120 INCHES MINIMUM AND 0.126 INCHES MAXIMUM 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 5310-00-021-7117, 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
DISC FORM 650
NSN: 5310-00-021-7117
FSC: 5310
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
diameter0.3751 INCHES MINIMUM AND 0.3753 INCHES MAXIMUM IN
materialSTEEL COMP 4140 OVERALL
nut_styleROUND
nut_diameter0.250 INCHES NOMINAL IN
recess_angle90.000 DEGREES NOMINAL
shank_length0.120 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
thread_class2B
hole_diameter0.565 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN
nut_thickness0.500 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_length0.875 INCHES NOMINAL IN
shank_diameter0.123 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
NSN5310-00-021-7117
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: DISC FORM 650 · 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 QUANTITY PER INCH: 40
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
NUT STYLE: ROUND
•
THREAD CLASS: 2B
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH40
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.112 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
NUT STYLEROUND
THREAD CLASS2B
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT THICKNESS0.500 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 360 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
DISC FORM 650Interchangeable
interchangeable cross-reference
interchangeable
00648-4Interchangeable
interchangeable cross-reference
interchangeable
2935-07Interchangeable
interchangeable cross-reference
interchangeable
2372Interchangeable
interchangeable cross-reference
interchangeable
23372Interchangeable
interchangeable cross-reference
interchangeable
E680702Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is DISC FORM 650?
DISC FORM 650 is a NUT,PLAIN,ROUND.
What parts can replace DISC FORM 650?
There are 22 known substitutes for DISC FORM 650: DISC FORM 650, 00648-4, 2935-07 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for DISC FORM 650?
DISC FORM 650 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-021-7117. 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