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Technical Data Sheet
PartsTable / COMPONENT / 123-31
123-31 ✓ Verified by PartsTable
DYMO · 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

1 White Paper, 1 White and 1 Clear Plastic Tape. Key specifications include thread_direction: RIGHT-HAND, end_item_identification: DAMPER CONTROL, thread_series_designator: UNIFIED NATIONAL COARSE (UNC), part_name_assigned_by_controlling_agency: 440/24V CONTROL TRANSFORMER V. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-071-2714, 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
123-31
NSN: 5310-00-071-2714
FSC: 5310
CAGE: 10639 — AVIONICS SPECIALTIES, INC. (USA)
SPECIFICATIONS
thread_directionRIGHT-HAND
end_item_identificationDAMPER CONTROL
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
part_name_assigned_by_controlling_agency440/24V CONTROL TRANSFORMER V
NSN5310-00-071-2714
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 123-31 · DYMO ⚠ 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.164 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OVERALL DIAMETER: 0.295 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
•
THICKNESS: 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLEROUND
HOLE DIAMETER0.164 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER0.295 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
THICKNESS0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
CENTER HOLE SHAPE STYLEROUND
MATERIALSTEEL CORROSION RESISTING OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
917 31/64Interchangeable
interchangeable cross-reference
interchangeable
503-S 31/64Interchangeable
interchangeable cross-reference
interchangeable
44031Interchangeable
interchangeable cross-reference
interchangeable
12-331Interchangeable
interchangeable cross-reference
interchangeable
3680Interchangeable
interchangeable cross-reference
interchangeable
MS39243-5L680-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 123-31?
123-31 is a SEAL ASSEMBLY,SHAFT,SPRING LOADE manufactured by DYMO.
What parts can replace 123-31?
There are 12 known substitutes for 123-31: 917 31/64, 503-S 31/64, 44031 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 123-31?
123-31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-071-2714. 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