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F253691 — NUT,PLAIN,CONE SEAT,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

F253691: NUT,PLAIN,CONE SEAT,HEXAGON.

The NUT,PLAIN,CONE SEAT,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CONE SEAT, HEXAGON, nut_height: 0.350 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, cone_seat_angle: 120.0 DEGREES NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-452-7934, 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
F253691
NSN: 5310-00-452-7934
FSC: 5310 — Nuts and Washers
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCONE SEAT, HEXAGON
nut_height0.350 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
cone_seat_angle120.0 DEGREES NOMINAL
special_featuresSLOTTED HEAD AND 0.650 IN. FLANGE DIA IN
thread_directionRIGHT-HAND
width_across_flats0.436 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
counterbore_diameter0.265 INCHES NOMINAL FIRST END IN
nut_counterbore_depth0.100 INCHES NOMINAL FIRST END IN
NSN5310-00-452-7934
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: F253691 · 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
•
WIDTH ACROSS FLATS: 0.436 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
NUT COUNTERBORE DEPTH: 0.100 INCHES NOMINAL FIRST END IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
COUNTERBORE DIAMETER: 0.265 INCHES NOMINAL FIRST END IN
•
CONE SEAT ANGLE: 120.0 DEGREES NOMINAL
•
NUT HEIGHT: 0.350 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.436 INCHES NOMINAL IN
THREAD SERIESUNF
NUT COUNTERBORE DEPTH0.100 INCHES NOMINAL FIRST END IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
COUNTERBORE DIAMETER0.265 INCHES NOMINAL FIRST END IN
CONE SEAT ANGLE120.0 DEGREES NOMINAL
NUT HEIGHT0.350 INCHES NOMINAL IN
SPECIAL FEATURESSLOTTED HEAD AND 0.650 IN. FLANGE DIA IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
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 F253691?
F253691 is a NUT,PLAIN,CONE SEAT,HEXAGON.
What is the NSN for F253691?
F253691 is cataloged in the U.S. Government catalog under NSN 5310-00-452-7934. 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.