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2552257-20 — NUT,PLAIN,KNURLED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2552257-20: NUT,PLAIN,KNURLED.

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include nut_style: KNURLED, nut_diameter: 0.690 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.630 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL COARSE (UNC), special_features: TWO WIRE HOLES,EQUALLY SPACED,GO THRU THE NUT DIA.. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-215-3474, 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
2552257-20
NSN: 5310-01-215-3474
FSC: 5310 — Nuts and Washers
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
nut_styleKNURLED
nut_diameter0.690 INCHES NOMINAL IN
thread_class2B
nut_thickness0.630 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
special_featuresTWO WIRE HOLES,EQUALLY SPACED,GO THRU THE NUT DIA.
thread_directionRIGHT-HAND
nominal_thread_size0.250 INCHES IN
thread_quantity_per_inch20
NSN5310-01-215-3474
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2552257-20 · 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
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.690 INCHES NOMINAL IN
•
NUT THICKNESS: 0.630 INCHES NOMINAL IN
•
NUT STYLE: KNURLED
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.690 INCHES NOMINAL IN
NUT THICKNESS0.630 INCHES NOMINAL IN
SPECIAL FEATURESTWO WIRE HOLES,EQUALLY SPACED,GO THRU THE NUT DIA.
NUT STYLEKNURLED
THREAD CLASS2B
THREAD QUANTITY PER INCH20
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: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2552257-20?
2552257-20 is a NUT,PLAIN,KNURLED.
What is the NSN for 2552257-20?
2552257-20 is cataloged in the U.S. Government catalog under NSN 5310-01-215-3474. 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.