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641-8178-001 — NUT,PLAIN,KNURLED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

641-8178-001: NUT,PLAIN,KNURLED.

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: KNURLED, nut_diameter: 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN, thread_class: 2B, nut_thickness: 0.470 INCHES NOMINAL IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-089-6041, 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
641-8178-001
NSN: 5310-01-089-6041
FSC: 5310 — Nuts and Washers
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleKNURLED
nut_diameter0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
thread_class2B
nut_thickness0.470 INCHES NOMINAL IN
thread_seriesUNF
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM BOTH ENDS
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.250 INCHES IN
counterbore_diameter0.625 INCHES NOMINAL NUT IN
drilled_hole_diameter0.062 INCHES NOMINAL IN
NSN5310-01-089-6041
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 641-8178-001 · 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 DOCUMENT AND CLASSIFICATION: 580-0025-000 FSCM 13499 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
HOLE CONFIGURATION STYLE: CONFIGURATION F
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NUT COUNTERBORE DEPTH: 0.190 INCHES NOMINAL NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION580-0025-000 FSCM 13499 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
HOLE CONFIGURATION STYLECONFIGURATION F
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH0.190 INCHES NOMINAL NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.625 INCHES NOMINAL NUT IN
NUT THICKNESS0.470 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

No substitute or cross-reference records for this part.

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 641-8178-001?
641-8178-001 is a NUT,PLAIN,KNURLED.
What is the NSN for 641-8178-001?
641-8178-001 is cataloged in the U.S. Government catalog under NSN 5310-01-089-6041. 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.