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S4427 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S4427: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include nut_style: HEXAGONHEXAGONHEXAGON, nut_height: 0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN, thread_class: 3B3B3B, thread_series: UNFUNFUNF, thread_direction: RIGHT-HANDRIGHT-HANDRIGHT-HAND, countersink_angle: 110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-433-3591, 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
S4427
NSN: 5310-00-433-3591
FSC: 5310 — Nuts and Washers
CAGE: 12511 — SIMMONDS PRECISION PRODUCTS INC (USA)
SPECIFICATIONS
nut_styleHEXAGONHEXAGONHEXAGON
nut_height0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN
thread_class3B3B3B
thread_seriesUNFUNFUNF
thread_directionRIGHT-HANDRIGHT-HANDRIGHT-HAND
countersink_angle110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT
surface_treatmentPASSIVATE OVERALLPASSIVATE OVERALL
width_across_flats0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES0.312 INCHES0.312 INCHES IN
bearing_surface_typeCHAMFEREDCHAMFEREDCHAMFERED
thread_quantity_per_inch242424
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-433-3591
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S4427 · 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: 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNFUNFUNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL66 FED STD ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HANDRIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES0.312 INCHES0.312 INCHES IN
•
NUT HEIGHT: 0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALLPASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNFUNFUNF
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL66 FED STD ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HANDRIGHT-HANDRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES0.312 INCHES0.312 INCHES IN
NUT HEIGHT0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALLPASSIVATE OVERALL
COUNTERSINK ANGLE110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT
NUT STYLEHEXAGONHEXAGONHEXAGON
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 S4427?
S4427 is a NUT,PLAIN,HEXAGON.
What is the NSN for S4427?
S4427 is cataloged in the U.S. Government catalog under NSN 5310-00-433-3591. 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.