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8725151 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8725151: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 3B, thread_series: UNF, overall_height: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, hardness_rating: 24.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-753-4014, 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
8725151
NSN: 5310-00-753-4014
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class3B
thread_seriesUNF
overall_height0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_features63 MICROINCH FINISH BEARING SURFACE,250 MICROINCH FINISH ON FLATS AND HEAD,0.020 IN. 45 DEGREE CHAMFER ON OD OF WASHER FACE IN
thread_directionRIGHT-HAND
washer_thickness0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
countersink_angle108.0 DEGREES MINIMUM AND 112.0 DEGREES MAXIMUM NUT
features_providedCASEHARDENED
NSN5310-00-753-4014
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8725151 · 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
•
WASHER OUTSIDE DIAMETER: 0.865 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325 TYPE 2 CLASS 3 FED SPEC 2ND TREATMENT RESPONSE OR QQ-Z-325 TYPE 2 CLASS 3 FED SPEC 3RD TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM
•
WASHER THICKNESS: 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.865 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.736 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-Z-325 TYPE 2 CLASS 3 FED SPEC 2ND TREATMENT RESPONSE OR QQ-Z-325 TYPE 2 CLASS 3 FED SPEC 3RD TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM
WASHER THICKNESS0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
FEATURES PROVIDEDCASEHARDENED
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES 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 8725151?
8725151 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What is the NSN for 8725151?
8725151 is cataloged in the U.S. Government catalog under NSN 5310-00-753-4014. 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.