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ST3M442-6A1 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

ST3M442-6A1: 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: 0.374 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 5310-01-431-7551, 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
ST3M442-6A1
NSN: 5310-01-431-7551
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialIRON ALLOY 660 SHELL
nut_stylePLATE
nut_height0.374 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_featuresASSEMBLY INCLUDES RETAING CLIP, P/N ST3M446-6
features_providedFLOATING NUT
surface_treatmentPASSIVATE SHELL
counterbore_diameter0.379 INCHES MINIMUM NUT IN
nut_counterbore_depth0.070 INCHES MINIMUM NUT IN
NSN5310-01-431-7551
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ST3M442-6A1 · 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 5735 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
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 5735 ASSN STD 2ND MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
NUT COUNTERBORE DEPTH0.070 INCHES MINIMUM NUT IN
FEATURES PROVIDEDFLOATING NUT
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 1
F49251E6-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 ST3M442-6A1?
ST3M442-6A1 is a NUT,SELF-LOCKING,PLATE.
What parts can replace ST3M442-6A1?
There is 1 known substitute for ST3M442-6A1: F49251E6-1. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M442-6A1?
ST3M442-6A1 is cataloged in the U.S. Government catalog under NSN 5310-01-431-7551. 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.