PartsTable
Technical Data Sheet
A20185 ✓ 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: STEEL COMP 1010 OVERALL, thickness: 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN, hole_diameter: 0.250 INCHES NOMINAL IN, heat_treatment: QUENCHED AND TEMPERED, overall_diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, surface_treatment: PHOSPHATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-517-4192, 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
A20185
NSN: 5310-00-517-4192
FSC: 5310
CAGE: U4574 — FNH UK LTD (GBR)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
thickness0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
hole_diameter0.250 INCHES NOMINAL IN
heat_treatmentQUENCHED AND TEMPERED
overall_diameter0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationMACHINE GUN,CAL. .50 (M2); NSN 1005-00-322-9715
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-517-4192
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A20185 · 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
OVERALL DIAMETER: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
MATERIAL: STEEL COMP 1010 OVERALL
HOLE DIAMETER: 0.250 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLE: ROUND
HEAT TREATMENT: QUENCHED AND TEMPERED
THICKNESS: 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1010 OVERALL
END ITEM IDENTIFICATIONMACHINE GUN,CAL. .50 (M2); NSN 1005-00-322-9715
HOLE DIAMETER0.250 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
HEAT TREATMENTQUENCHED AND TEMPERED
THICKNESS0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A10726Interchangeable
interchangeable cross-reference
interchangeable
A2048-1Interchangeable
interchangeable cross-reference
interchangeable
A-20185Interchangeable
interchangeable cross-reference
interchangeable
10-2204 ITEM 233Interchangeable
interchangeable cross-reference
interchangeable
20-185Interchangeable
interchangeable cross-reference
interchangeable
1005005174192Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A20185?
A20185 is a GASKET.
What parts can replace A20185?
There are 7 known substitutes for A20185: A10726, A2048-1, A-20185 and 4 more. Substitute compatibility should be verified for your specific system.
Is A20185 still available?
A20185 is currently cancelled.
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