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6256B-SS-2528 — NUT,PLAIN,SPLINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6256B-SS-2528: NUT,PLAIN,SPLINE.

The NUT,PLAIN,SPLINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: SPLINE, nut_height: 0.438 INCHES NOMINAL IN, nut_diameter: 0.500 INCHES NOMINAL IN, pilot_length: 0.352 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-451-4173, 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
6256B-SS-2528
NSN: 5310-01-451-4173
FSC: 5310 — Nuts and Washers
CAGE: 1YGB8 — CAREY MANUFACTURING CO, INC DBA AMATOM ELECTRONIC HARDWARE DIV AMATOM ELECTRONIC HARDWARE (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleSPLINE
nut_height0.438 INCHES NOMINAL IN
nut_diameter0.500 INCHES NOMINAL IN
pilot_length0.352 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
pilot_diameter0.366 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle45.0 DEGREES NOMINAL NUT
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.250 INCHES IN
NSN5310-01-451-4173
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6256B-SS-2528 · 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: MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NUT COUNTERBORE DEPTH: 0.298 INCHES MINIMUM AND 0.299 INCHES MAXIMUM NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.500 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM NUT IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH0.298 INCHES MINIMUM AND 0.299 INCHES MAXIMUM NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.500 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM NUT IN
PILOT DIAMETER0.366 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN
PILOT LENGTH0.352 INCHES MINIMUM AND 0.362 INCHES MAXIMUM 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 6256B-SS-2528?
6256B-SS-2528 is a NUT,PLAIN,SPLINE.
What is the NSN for 6256B-SS-2528?
6256B-SS-2528 is cataloged in the U.S. Government catalog under NSN 5310-01-451-4173. 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.