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HW78PT — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

HW78PT: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.18 INCHES NOMINAL IN, hole_diameter: 1.5 INCHES NOMINAL IN, overall_diameter: 1.50 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-540-1537, 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
HW78PT
NSN: 5310-01-540-1537
FSC: 5310 — Nuts and Washers
CAGE: 8W572 — DETROIT STEEL PRODUCTS MEMBER MARMON GROUP OF COMPANIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.18 INCHES NOMINAL IN
hole_diameter1.5 INCHES NOMINAL IN
overall_diameter1.50 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-540-1537
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HW78PT · 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: 1.50 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
COLOR: BLACK OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.5 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.50 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORBLACK OVERALL
PERIPHERAL SHAPE STYLEROUND
END ITEM IDENTIFICATION2320-01-519-8173 COUGAR 4X4 EOD VARIANT; 2355-01-532-2174 JOINT EOD RAPID RESPONSE VEHICLE (JERRV) 4X4 EOD VARIANT; 2355-01-532-2159 JOINT EOD RAPID RESPONSE VEHICLE (JERRV) 6X6 ENGINEER VARIANT; 2320-01-519-8172 COUGAR 6X6 ENGINEER
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.5 INCHES NOMINAL IN
THICKNESS0.18 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
4000220Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HW78PT?
HW78PT is a WASHER,FLAT.
What parts can replace HW78PT?
There is 1 known substitute for HW78PT: 4000220. Substitute compatibility should be verified for your specific system.
What is the NSN for HW78PT?
HW78PT is cataloged in the U.S. Government catalog under NSN 5310-01-540-1537. 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.