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WR43ZM12 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

WR43ZM12: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 3.1 MILLIMETERS MAXIMUM MM, hardness_rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM, overall_diameter: 27.0 MILLIMETERS NOMINAL MM, special_features: WEIGHT: 11.69KG KG, center_hole_width: 14.0 MILLIMETERS NOMINAL MM. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-649-9684, 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
WR43ZM12
NSN: 5310-01-649-9684
FSC: 5310 — Nuts and Washers
CAGE: ZE701 — HOBSON ENGINEERING CO PTY LTD (AUS)
SPECIFICATIONS
materialSTEEL OVERALL
thickness3.1 MILLIMETERS MAXIMUM MM
hardness_rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
overall_diameter27.0 MILLIMETERS NOMINAL MM
special_featuresWEIGHT: 11.69KG KG
center_hole_width14.0 MILLIMETERS NOMINAL MM
features_providedCASEHARDENED
surface_treatmentZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
part_name_assigned_by_controlling_agencyHARDENED WASHER
NSN5310-01-649-9684
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WR43ZM12 · 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
•
CENTER HOLE WIDTH: 14.0 MILLIMETERS NOMINAL MM
•
OVERALL DIAMETER: 27.0 MILLIMETERS NOMINAL MM
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
FEATURES PROVIDED: CASEHARDENED
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: ZINC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
CENTER HOLE WIDTH14.0 MILLIMETERS NOMINAL MM
OVERALL DIAMETER27.0 MILLIMETERS NOMINAL MM
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
FEATURES PROVIDEDCASEHARDENED
COLORBLACK OVERALL
SPECIAL FEATURESWEIGHT: 11.69KG KG
SURFACE TREATMENTZINC OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYHARDENED WASHER
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
ASTM F436MReference document
Same NSN cross-reference
Reference document — Secondary reference
371120/373021Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HWZSM9122740-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is WR43ZM12?
WR43ZM12 is a WASHER,FLAT.
What parts can replace WR43ZM12?
There are 3 known substitutes for WR43ZM12: ASTM F436M, 371120/373021, HWZSM9122740-01. Substitute compatibility should be verified for your specific system.
What is the NSN for WR43ZM12?
WR43ZM12 is cataloged in the U.S. Government catalog under NSN 5310-01-649-9684. 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.