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PartsTable / COMPONENT / AN902B20
AN902B20 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, hardness_rating: 60.0 SHORE DUROMETER A MINIMUM AND 70.0 SHORE DUROMETER A MAXIMUM OVERALL, outside_diameter: 1.704 INCHES MINIMUM AND 1.749 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 1.494 INCHES MINIMUM AND 1.509 INCHES MAXIMUM IN, cross-sectional_thickness: 0.105 INCHES MINIMUM AND 0.120 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 5310-00-186-1373, 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
AN902B20
NSN: 5310-00-186-1373
FSC: 5310
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
hardness_rating60.0 SHORE DUROMETER A MINIMUM AND 70.0 SHORE DUROMETER A MAXIMUM OVERALL
outside_diameter1.704 INCHES MINIMUM AND 1.749 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter1.494 INCHES MINIMUM AND 1.509 INCHES MAXIMUM IN
cross-sectional_thickness0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5310-00-186-1373
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AN902B20 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.110 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
OVERALL DIAMETER: 1.729 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 1.509 INCHES NOMINAL IN
•
HARDNESS RATING: 68.0 SHORE DUROMETER A NOMINAL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.110 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
OVERALL DIAMETER1.729 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER1.509 INCHES NOMINAL IN
HARDNESS RATING68.0 SHORE DUROMETER A NOMINAL
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
99-720Interchangeable
interchangeable cross-reference
interchangeable
S1841-32Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN902B20?
AN902B20 is a GASKET.
What parts can replace AN902B20?
There are 2 known substitutes for AN902B20: 99-720, S1841-32. Substitute compatibility should be verified for your specific system.
What is the NSN for AN902B20?
AN902B20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-1373. 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