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0161177 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

0161177: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, hole_diameter: 0.375 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL, peripheral_shape_style: ROUND, end_item_identification: MRAP ALL VARIANTS; MRAP - COUGAR; MRAP - COUGAR CAT1 A2. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-610-7432, 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
0161177
NSN: 5310-01-610-7432
FSC: 5310 — Nuts and Washers
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
hole_diameter0.375 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
peripheral_shape_styleROUND
end_item_identificationMRAP ALL VARIANTS; MRAP - COUGAR; MRAP - COUGAR CAT1 A2
NSN5310-01-610-7432
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0161177 · 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
•
SURFACE TREATMENT: ZINC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 4140 OVERALL
•
HOLE DIAMETER: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENTZINC OVERALL
PERIPHERAL SHAPE STYLEROUND
END ITEM IDENTIFICATIONMRAP ALL VARIANTS; MRAP - COUGAR; MRAP - COUGAR CAT1 A2
MATERIALSTEEL COMP 4140 OVERALL
HOLE DIAMETER0.375 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
AEW01X375000BD6A81Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 0161177?
0161177 is a WASHER,FLAT.
What parts can replace 0161177?
There is 1 known substitute for 0161177: AEW01X375000BD6A81. Substitute compatibility should be verified for your specific system.
What is the NSN for 0161177?
0161177 is cataloged in the U.S. Government catalog under NSN 5310-01-610-7432. 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.