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30183R1 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

30183R1: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 2.5 MILLIMETERS NOMINAL MM, hole_diameter: 8.8 MILLIMETERS NOMINAL MM, overall_diameter: 21.0 MILLIMETERS NOMINAL MM, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND, end_item_identification: MRAP - UNIQUE NSN - MAXXPRO CAT I. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-567-0382, 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
30183R1
NSN: 5310-01-567-0382
FSC: 5310 — Nuts and Washers
CAGE: 338X5 — ND DEFENSE LLC (USA)
SPECIFICATIONS
thickness2.5 MILLIMETERS NOMINAL MM
hole_diameter8.8 MILLIMETERS NOMINAL MM
overall_diameter21.0 MILLIMETERS NOMINAL MM
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationMRAP - UNIQUE NSN - MAXXPRO CAT I
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyWASHER,8-8.8 X 21 X 2.5
NSN5310-01-567-0382
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 30183R1 · 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: 21.0 MILLIMETERS NOMINAL MM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 8.8 MILLIMETERS NOMINAL MM
•
THICKNESS: 2.5 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER21.0 MILLIMETERS NOMINAL MM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,8-8.8 X 21 X 2.5
END ITEM IDENTIFICATIONMRAP - UNIQUE NSN - MAXXPRO CAT I
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER8.8 MILLIMETERS NOMINAL MM
THICKNESS2.5 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 2
ESP-FM-16.121-PPReference document
Same NSN cross-reference
Reference document — Drawing number reference only
ESP-FM-16.101-GSReference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 30183R1?
30183R1 is a WASHER,FLAT.
What parts can replace 30183R1?
There are 2 known substitutes for 30183R1: ESP-FM-16.121-PP, ESP-FM-16.101-GS. Substitute compatibility should be verified for your specific system.
What is the NSN for 30183R1?
30183R1 is cataloged in the U.S. Government catalog under NSN 5310-01-567-0382. 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.