PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 255753 PIECE 46
255753 PIECE 46 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY R-405 NUT, nut_style: HEXAGON, nut_height: 0.532 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNJC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-441-9209, 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
255753 PIECE 46
NSN: 5310-01-441-9209
FSC: 5310
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialNICKEL ALLOY R-405 NUT
nut_styleHEXAGON
nut_height0.532 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNJC
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES MINIMUM NUT
width_across_flats0.679 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
NSN5310-01-441-9209
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 255753 PIECE 46 · 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
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE NUT
•
COUNTERSINK ANGLE: 88.0 DEGREES MINIMUM NUT
•
MATERIAL: NICKEL ALLOY R-405 NUT
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.532 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.375 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE NUT
COUNTERSINK ANGLE88.0 DEGREES MINIMUM NUT
MATERIALNICKEL ALLOY R-405 NUT
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.532 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD SERIESUNJC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
E643-7002-131L1Interchangeable
interchangeable cross-reference
interchangeable
167-7409320-64L1Interchangeable
interchangeable cross-reference
interchangeable
H525-7708-6Interchangeable
interchangeable cross-reference
interchangeable
218017969FAInterchangeable
interchangeable cross-reference
interchangeable
M25027/1-6CD5Interchangeable
interchangeable cross-reference
interchangeable
7384568 PN 52Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 255753 PIECE 46?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 255753 PIECE 46?
255753 PIECE 46 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 255753 PIECE 46?
There are 15 known substitutes for 255753 PIECE 46: E643-7002-131L1, 167-7409320-64L1, H525-7708-6 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 255753 PIECE 46?
255753 PIECE 46 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-441-9209. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 255753 PIECE 46

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026