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82278-171 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

82278-171: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thickness: 0.032 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN, hole_diameter: 0.193 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN, overall_diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, surface_treatment: NICKEL OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-205-9399, 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
82278-171
NSN: 5310-00-205-9399
FSC: 5310 — Nuts and Washers
CAGE: 49671 — LOCKHEED MARTIN CORPORATION DBA LOCKHEED MARTIN DIV LOCKHEED MARTIN (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thickness0.032 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN
hole_diameter0.193 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
overall_diameter0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
surface_treatmentNICKEL OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-205-9399
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 82278-171 · 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: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: NICKEL OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: COPPER ALLOY OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.193 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
•
THICKNESS: 0.032 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTNICKEL OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALCOPPER ALLOY OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.193 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
THICKNESS0.032 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 5
626Reference document
Same NSN cross-reference
Reference document — Secondary reference
1453-NPADXReference document
Same NSN cross-reference
Reference document — Secondary reference
3811-3-10Reference document
Same NSN cross-reference
Reference document — Secondary reference
10LReference document
Same NSN cross-reference
Reference document — Design control — primary reference
1453-NPReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 82278-171?
82278-171 is a WASHER,FLAT.
What parts can replace 82278-171?
There are 5 known substitutes for 82278-171: 626, 1453-NPADX, 3811-3-10 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 82278-171?
82278-171 is cataloged in the U.S. Government catalog under NSN 5310-00-205-9399. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.