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Technical Data Sheet
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443557 ✓ 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 CLAMP DIE,AIRCRAFT, is a the manufacturer industrial component. Key specifications include height: 1.312 INCHES NOMINAL IN, material: ASBESTOS BOTTOM RING, inside_diameter: 2.250 INCHES NOMINAL IN, outside_diameter: 2.875 INCHES NOMINAL IN, cross-sectional_shape_style: SQUARE/RECTANGULAR BOTTOM RING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-4358, 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
443557
NSN: 5310-00-209-4358
FSC: 5310
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
height1.312 INCHES NOMINAL IN
materialASBESTOS BOTTOM RING
inside_diameter2.250 INCHES NOMINAL IN
outside_diameter2.875 INCHES NOMINAL IN
intermediate_ring_quantity2
cross-sectional_shape_styleSQUARE/RECTANGULAR BOTTOM RING
NSN5310-00-209-4358
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 443557 · 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
•
OVERALL DIAMETER: 0.484 INCHES NOMINAL IN
•
THICKNESS: 0.040 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 0.257 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.484 INCHES NOMINAL IN
THICKNESS0.040 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER0.257 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
443557Interchangeable
interchangeable cross-reference
interchangeable
A504Interchangeable
interchangeable cross-reference
interchangeable
505141Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 443557?
443557 is a CLAMP DIE,AIRCRAFT,.
What parts can replace 443557?
There are 3 known substitutes for 443557: 443557, A504, 505141. Substitute compatibility should be verified for your specific system.
What is the NSN for 443557?
443557 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-4358. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026