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4M307-1-19 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4M307-1-19: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, thickness: 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN, hole_diameter: 0.297 INCHES NOMINAL IN, overall_diameter: 0.859 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-629-8517, 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
4M307-1-19
NSN: 5310-01-629-8517
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
thickness0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
hole_diameter0.297 INCHES NOMINAL IN
overall_diameter0.859 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationF15 A-3
cross-sectional_shape_styleBLANK RECTANGULAR
part_name_assigned_by_controlling_agencyWASHER FLAT
NSN5310-01-629-8517
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4M307-1-19 · 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: 0.859 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: BLANK RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.297 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.859 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEBLANK RECTANGULAR
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER FLAT
END ITEM IDENTIFICATIONF15 A-3
MATERIALALUMINUM ALLOY 6061 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.297 INCHES NOMINAL IN
THICKNESS0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
4M307Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4M307-1-19?
4M307-1-19 is a WASHER,FLAT.
What parts can replace 4M307-1-19?
There is 1 known substitute for 4M307-1-19: 4M307. Substitute compatibility should be verified for your specific system.
What is the NSN for 4M307-1-19?
4M307-1-19 is cataloged in the U.S. Government catalog under NSN 5310-01-629-8517. 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.