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PartsTable / COMPONENT / 121101-1
121101-1 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, thickness: 0.063 INCHES NOMINAL IN, hole_diameter: 0.688 INCHES MINIMUM AND 0.689 INCHES MAXIMUM IN, surface_finish: 125.0 MICROINCHES ALL SURFACES, overall_diameter: 1.250 INCHES NOMINAL IN, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-483-1449, 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
121101-1
NSN: 5310-01-483-1449
FSC: 5310
CAGE: 82340 — L3HARRIS TECHNOLOGIES, INC. DIV SPACE AND AIRBORNE SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
thickness0.063 INCHES NOMINAL IN
hole_diameter0.688 INCHES MINIMUM AND 0.689 INCHES MAXIMUM IN
surface_finish125.0 MICROINCHES ALL SURFACES
overall_diameter1.250 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-763,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-01-483-1449
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 121101-1 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE FINISH: 125.0 MICROINCHES ALL SURFACES
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OVERALL DIAMETER: 1.250 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.063 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.688 INCHES MINIMUM AND 0.689 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE FINISH125.0 MICROINCHES ALL SURFACES
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER1.250 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.063 INCHES NOMINAL IN
HOLE DIAMETER0.688 INCHES MINIMUM AND 0.689 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
MATERIALSTEEL COMP 303 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
12110-1Interchangeable
interchangeable cross-reference
interchangeable
2085381-4Interchangeable
interchangeable cross-reference
interchangeable
C-12110-1Interchangeable
interchangeable cross-reference
interchangeable
S510044Interchangeable
interchangeable cross-reference
interchangeable
401590Interchangeable
interchangeable cross-reference
interchangeable
9409018Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121101-1?
121101-1 is a WASHER,FLAT.
What parts can replace 121101-1?
There are 11 known substitutes for 121101-1: 12110-1, 2085381-4, C-12110-1 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121101-1?
121101-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-483-1449. 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