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6256E-SS-2528 — NUT,PLAIN,SPLINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

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

The NUT,PLAIN,SPLINE is a the manufacturer industrial component. Key specifications include nut_style: SPLINE, nut_height: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, nut_diameter: 0.497 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN, pilot_length: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-113-9815, 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
6256E-SS-2528
NSN: 5310-01-113-9815
FSC: 5310 — Nuts and Washers
CAGE: 1YGB8 — CAREY MANUFACTURING CO, INC DBA AMATOM ELECTRONIC HARDWARE DIV AMATOM ELECTRONIC HARDWARE (USA)
SPECIFICATIONS
nut_styleSPLINE
nut_height0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
nut_diameter0.497 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
pilot_length0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
pilot_diameter0.366 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.250 INCHES IN
counterbore_diameter0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM NUT IN
nut_counterbore_depth0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM NUT IN
NSN5310-01-113-9815
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6256E-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: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
NUT COUNTERBORE DEPTH: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.497 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
•
COUNTERBORE DIAMETER: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM NUT IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581 ASSN STD ALL MATERIAL RESPONSES OVERALL
NUT COUNTERBORE DEPTH0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.497 INCHES MINIMUM AND 0.503 INCHES MAXIMUM 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 LENGTH0.245 INCHES MINIMUM AND 0.255 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 1
HY-519-28Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 6256E-SS-2528?
6256E-SS-2528 is a NUT,PLAIN,SPLINE.
What parts can replace 6256E-SS-2528?
There is 1 known substitute for 6256E-SS-2528: HY-519-28. Substitute compatibility should be verified for your specific system.
What is the NSN for 6256E-SS-2528?
6256E-SS-2528 is cataloged in the U.S. Government catalog under NSN 5310-01-113-9815. 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.