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F49251E6-2 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

F49251E6-2: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 SHELL, nut_style: PLATE, nut_height: 0.424 INCHES MAXIMUM IN, nut_length: 1.441 INCHES MAXIMUM IN, plate_width: 0.740 INCHES MAXIMUM IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-280-6758, 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
F49251E6-2
NSN: 5310-01-280-6758
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialIRON ALLOY 660 SHELL
nut_stylePLATE
nut_height0.424 INCHES MAXIMUM IN
nut_length1.441 INCHES MAXIMUM IN
plate_width0.740 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN
special_featuresASSY INCLUDES RETAINING CLIP,P/N ST3M446-6
surface_treatmentPASSIVATE SHELL
counterbore_diameter0.379 INCHES MINIMUM NUT IN
nut_counterbore_depth0.125 INCHES MINIMUM NUT IN
mounting_hole_diameter0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
NSN5310-01-280-6758
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: F49251E6-2 · 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
•
PLATE THICKNESS: 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN
•
NUT LENGTH: 1.441 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SHELL
•
PLATE WIDTH: 0.740 INCHES MAXIMUM IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
REMOVABLE NUT MANUFACTURER PART NUMBER: ST3M445C6M2
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5732 ASSN STD 2ND MATERIAL RESPONSE SHELL
•
MOUNTING HOLE DIAMETER: 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN
NUT LENGTH1.441 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SHELL
PLATE WIDTH0.740 INCHES MAXIMUM IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
REMOVABLE NUT MANUFACTURER PART NUMBERST3M445C6M2
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5732 ASSN STD 2ND MATERIAL RESPONSE SHELL
MOUNTING HOLE DIAMETER0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
NUT COUNTERBORE DEPTH0.125 INCHES MINIMUM NUT IN
COUNTERBORE DIAMETER0.379 INCHES MINIMUM NUT IN
SUBSTITUTES & CROSS-REFERENCES 2
10110277Reference document
Same NSN cross-reference
Reference document — Informative reference only
ST3M442-6A2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 F49251E6-2?
F49251E6-2 is a NUT,SELF-LOCKING,PLATE.
What parts can replace F49251E6-2?
There are 2 known substitutes for F49251E6-2: 10110277, ST3M442-6A2. Substitute compatibility should be verified for your specific system.
What is the NSN for F49251E6-2?
F49251E6-2 is cataloged in the U.S. Government catalog under NSN 5310-01-280-6758. 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.