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845-6556491 — NUT,SELF-LOCKING,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

845-6556491: NUT,SELF-LOCKING,ROUND.

The NUT,SELF-LOCKING,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4147 OR STEEL COMP 4150 OVERALL, nut_style: ROUND, nut_diameter: 6.711 INCHES MINIMUM AND 6.751 INCHES MAXIMUM IN, thread_class: 2B, nut_thickness: 0.467 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-382-3160, 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
845-6556491
NSN: 5310-01-382-3160
NIINs: 013823160, 014132666
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 4147 OR STEEL COMP 4150 OVERALL
nut_styleROUND
nut_diameter6.711 INCHES MINIMUM AND 6.751 INCHES MAXIMUM IN
thread_class2B
nut_thickness0.467 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN
thread_seriesUN
thread_directionRIGHT-HAND
drive_point_width0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
small_end_diameter6.355 INCHES MINIMUM AND 6.395 INCHES MAXIMUM IN
undercut_thickness0.140 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
nominal_thread_size5.750 INCHES IN
drive_point_quantity4
NSN5310-01-382-3160
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 845-6556491 · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
SUBSTITUTES & CROSS-REFERENCES 2
845-6800704-042Reference document
Same NSN cross-reference
Reference document — Secondary reference
845-6603141-42Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 845-6556491?
845-6556491 is a NUT,SELF-LOCKING,ROUND.
What parts can replace 845-6556491?
There are 2 known substitutes for 845-6556491: 845-6800704-042, 845-6603141-42. Substitute compatibility should be verified for your specific system.
What is the NSN for 845-6556491?
845-6556491 is cataloged in the U.S. Government catalog under NSN 5310-01-382-3160. 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.