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PartsTable / COMPONENT / 905E776 ITEM 43
905E776 ITEM 43 ✓ 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 WASHER,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 1.992 INCHES MINIMUM AND 2.017 INCHES MAXIMUM IN, outside_diameter: 2.438 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN, external_key_quantity: 17, special_test_features: SPECIAL QUALITY CONTROL TESTING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-132-8555, 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
905E776 ITEM 43
NSN: 5310-01-132-8555
FSC: 5310
CAGE: 94259 — FLUOR MARINE PROPULSION, LLC (USA)
SPECIFICATIONS
hole_diameter1.992 INCHES MINIMUM AND 2.017 INCHES MAXIMUM IN
outside_diameter2.438 INCHES MINIMUM AND 2.468 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
external_key_quantity17
special_test_featuresSPECIAL QUALITY CONTROL TESTING
external_prebent_key_width0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
internal_prebent_key_width0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
internal_prebent_key_length0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
criticality_code_justificationZZZY
overall_distance_including_keys2.8595 INCHES MINIMUM AND 2.9220 INCHES MAXIMUM IN
material_document_and_classificationA2SI,COND A ASSN STD ALL MATERIAL RESPONSES OVERALL
NSN5310-01-132-8555
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 905E776 ITEM 43 · 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
•
INTERNAL PREBENT KEY LENGTH: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
•
HOLE DIAMETER: 1.992 INCHES MINIMUM AND 2.017 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303 PLUS X OR STEEL COMP 303SE OR STEEL COMP 303CU OR STEEL COMP 303MA OR STEEL COMP 303PB OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 304H OVERALL
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
•
EXTERNAL KEY QUANTITY: 17
•
TEST DATA DOCUMENT: 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
STYLE DESIGNATOR: KEY
•
EXTERNAL PREBENT KEY WIDTH: 0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL PREBENT KEY LENGTH0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
HOLE DIAMETER1.992 INCHES MINIMUM AND 2.017 INCHES MAXIMUM IN
MATERIALSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303 PLUS X OR STEEL COMP 303SE OR STEEL COMP 303CU OR STEEL COMP 303MA OR STEEL COMP 303PB OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 304H OVERALL
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
EXTERNAL KEY QUANTITY17
TEST DATA DOCUMENT81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
STYLE DESIGNATORKEY
EXTERNAL PREBENT KEY WIDTH0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
SPECIAL TEST FEATURESSPECIAL QUALITY CONTROL TESTING
CRITICALITY CODE JUSTIFICATIONZZZY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
2HG156Interchangeable
interchangeable cross-reference
interchangeable
CA35S41-095PC17WASHERInterchangeable
interchangeable cross-reference
interchangeable
A1A156A103PC41Interchangeable
interchangeable cross-reference
interchangeable
531574-001Interchangeable
interchangeable cross-reference
interchangeable
HB202-1Interchangeable
interchangeable cross-reference
interchangeable
W10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 905E776 ITEM 43?
905E776 ITEM 43 is a WASHER,KEY.
What parts can replace 905E776 ITEM 43?
There are 18 known substitutes for 905E776 ITEM 43: 2HG156, CA35S41-095PC17WASHER, A1A156A103PC41 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 905E776 ITEM 43?
905E776 ITEM 43 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-132-8555. 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