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40NWSFS — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

40NWSFS: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, thickness: 0.5 MILLIMETERS NOMINAL MM, hole_diameter: 4.3 MILLIMETERS NOMINAL MM, overall_diameter: 8.0 MILLIMETERS NOMINAL MM, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-500-6552, 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
40NWSFS
NSN: 5310-01-500-6552
FSC: 5310 — Nuts and Washers
CAGE: 3L891 — STANDARD BOLT NUT AND SCREW CO (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
thickness0.5 MILLIMETERS NOMINAL MM
hole_diameter4.3 MILLIMETERS NOMINAL MM
overall_diameter8.0 MILLIMETERS NOMINAL MM
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationPMEL CALIBRATION EQUIPMENT, HYD PRESSURE
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-500-6552
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 40NWSFS · 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: 8.0 MILLIMETERS NOMINAL MM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 304 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 4.3 MILLIMETERS NOMINAL MM
•
THICKNESS: 0.5 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER8.0 MILLIMETERS NOMINAL MM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
END ITEM IDENTIFICATIONPMEL CALIBRATION EQUIPMENT, HYD PRESSURE
MATERIALSTEEL COMP 304 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER4.3 MILLIMETERS NOMINAL MM
THICKNESS0.5 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 1
DIN 433-M4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 40NWSFS?
40NWSFS is a WASHER,FLAT.
What parts can replace 40NWSFS?
There is 1 known substitute for 40NWSFS: DIN 433-M4. Substitute compatibility should be verified for your specific system.
What is the NSN for 40NWSFS?
40NWSFS is cataloged in the U.S. Government catalog under NSN 5310-01-500-6552. 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.