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141251 ✓ 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

SUPPORT,STRUCTURAL COMPONENT,AIR. Key specifications include end_item_identification: AVIATION LIFE SUPPORT SYSTEMS; ALSS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-103-0680, 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
141251
NSN: 5310-00-103-0680
FSC: 5310
CAGE: U0027 — INTERLUBE SYSTEMS (GBR)
SPECIFICATIONS
end_item_identificationAVIATION LIFE SUPPORT SYSTEMS; ALSS
NSN5310-00-103-0680
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 141251 · 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
•
OVERALL DIAMETER: 0.625 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
•
MATERIAL: WOOL COMP 16R1 OVERALL
•
THICKNESS: 0.125 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: C-F-206,TYPE 1,CL 16R1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.344 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MINIMUM TENSILE STRENGTH: 500 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.625 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
MATERIALWOOL COMP 16R1 OVERALL
THICKNESS0.125 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONC-F-206,TYPE 1,CL 16R1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SPECIAL FEATURESMOISTURE RESISTANT MIL-T-2312 TYPE 2
HOLE DIAMETER0.344 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MINIMUM TENSILE STRENGTH500 POUNDS PER SQUARE INCH LBS
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
141251Interchangeable
interchangeable cross-reference
interchangeable
SU2735Interchangeable
interchangeable cross-reference
interchangeable
N5521Interchangeable
interchangeable cross-reference
interchangeable
33-4031Interchangeable
interchangeable cross-reference
interchangeable
N539675 PIECE 94Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 141251?
141251 is a SUPPORT,STRUCTURAL COMPONENT,AIR.
What parts can replace 141251?
There are 5 known substitutes for 141251: 141251, SU2735, N5521 and 2 more. Substitute compatibility should be verified for your specific system.
Is 141251 still available?
141251 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026