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Technical Data Sheet
91A12179 ✓ 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 1020 OVERALL, thickness: 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN, hole_diameter: 0.431 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN, overall_diameter: 0.743 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-358-7994, 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
91A12179
NSN: 5310-00-358-7994
FSC: 5310
CAGE: 57526 — FORD MOTOR COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
thickness0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
hole_diameter0.431 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
overall_diameter0.743 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-358-7994
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91A12179 · 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
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: STEEL COMP 1020 OVERALL
PERIPHERAL SHAPE STYLE: ROUND
HOLE DIAMETER: 0.431 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
OVERALL DIAMETER: 0.743 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLE: ROUND
THICKNESS: 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1020 OVERALL
PERIPHERAL SHAPE STYLEROUND
HOLE DIAMETER0.431 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
OVERALL DIAMETER0.743 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
29520Interchangeable
interchangeable cross-reference
interchangeable
1642N2Interchangeable
interchangeable cross-reference
interchangeable
48179Interchangeable
interchangeable cross-reference
interchangeable
F328Interchangeable
interchangeable cross-reference
interchangeable
767Interchangeable
interchangeable cross-reference
interchangeable
ASME B94.19Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91A12179?
91A12179 is a WASHER,FLAT.
What parts can replace 91A12179?
There are 13 known substitutes for 91A12179: 29520, 1642N2, 48179 and 10 more. Substitute compatibility should be verified for your specific system.
Is 91A12179 still available?
91A12179 is currently cancelled.
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