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191287 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

191287: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416F OVERALL, thickness: 0.0345 INCHES MINIMUM AND 0.0355 INCHES MAXIMUM IN, hole_diameter: 0.126 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, surface_finish: 100.0 MICROINCHES INNER, overall_diameter: 0.250 INCHES NOMINAL IN, surface_treatment: OXIDE FILM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-662-0272, 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
191287
NSN: 5310-00-662-0272
NIINs: 006620272, 013089637
FSC: 5310 — Nuts and Washers
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
materialSTEEL COMP 416F OVERALL
thickness0.0345 INCHES MINIMUM AND 0.0355 INCHES MAXIMUM IN
hole_diameter0.126 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
surface_finish100.0 MICROINCHES INNER
overall_diameter0.250 INCHES NOMINAL IN
surface_treatmentOXIDE FILM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS5610 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-662-0272
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 191287 · 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
•
SURFACE FINISH: 40.0 MICROINCHES TOP
•
OVERALL DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5610 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: OXIDE FILM OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH40.0 MICROINCHES TOP
SURFACE FINISH40.0 MICROINCHES BOTTOM
SURFACE FINISH100.0 MICROINCHES INNER
SURFACE FINISH100.0 MICROINCHES OUTER
OVERALL DIAMETER0.250 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5610 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTOXIDE FILM OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 416F OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 191287?
191287 is a WASHER,FLAT.
What is the NSN for 191287?
191287 is cataloged in the U.S. Government catalog under NSN 5310-00-662-0272. 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.