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6251D-SS-0632 — NUT,PLAIN,KNURLED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6251D-SS-0632: NUT,PLAIN,KNURLED.

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OVERALL, nut_diameter: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN, thread_class: 2B, nut_thickness: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-105-8090, 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
6251D-SS-0632
NSN: 5310-01-105-8090
FSC: 5310 — Nuts and Washers
CAGE: 1YGB8 — CAREY MANUFACTURING CO, INC DBA AMATOM ELECTRONIC HARDWARE DIV AMATOM ELECTRONIC HARDWARE (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OVERALL
nut_diameter0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
thread_class2B
nut_thickness0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.138 INCHES IN
counterbore_diameter0.149 INCHES MINIMUM AND 0.152 INCHES MAXIMUM OVERALL EXCEPT THREADS IN
nut_counterbore_depth0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM OVERALL EXCEPT THREADS IN
thread_quantity_per_inch32
material_document_and_classificationQQ-S-763,CLASS 7,TYPE A FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-01-105-8090
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6251D-SS-0632 · 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,SIG C E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,CLASS 7,TYPE A FED SPEC ALL MATERIAL RESPONSES OVERALL
•
NUT COUNTERBORE DEPTH: 0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM OVERALL EXCEPT THREADS IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
NUT DIAMETER: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
•
COUNTERBORE DIAMETER: 0.149 INCHES MINIMUM AND 0.152 INCHES MAXIMUM OVERALL EXCEPT THREADS IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,SIG C E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,CLASS 7,TYPE A FED SPEC ALL MATERIAL RESPONSES OVERALL
NUT COUNTERBORE DEPTH0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM OVERALL EXCEPT THREADS IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.138 INCHES IN
NUT DIAMETER0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.149 INCHES MINIMUM AND 0.152 INCHES MAXIMUM OVERALL EXCEPT THREADS IN
NUT THICKNESS0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6251D-SS-0632?
6251D-SS-0632 is a NUT,PLAIN,KNURLED.
What is the NSN for 6251D-SS-0632?
6251D-SS-0632 is cataloged in the U.S. Government catalog under NSN 5310-01-105-8090. 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.