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505257 ✓ 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 TRANSISTOR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_width: 0.450 INCHES MAXIMUM IN, overall_height: 1.050 INCHES MAXIMUM IN, overall_length: 1.573 INCHES MAXIMUM IN, first_end_style: CHAMFERED, mounting_method: UNTHREADED HOLE(S). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-089-4942, 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
505257
NSN: 5315-00-089-4942
FSC: 5315
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.450 INCHES MAXIMUM IN
overall_height1.050 INCHES MAXIMUM IN
overall_length1.573 INCHES MAXIMUM IN
transfer_ratio15.0 MINIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER AND 60.0 MAXIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
first_end_styleCHAMFERED
mounting_methodUNTHREADED HOLE(S)
features_providedHERMETICALLY SEALED CASE
pin_overall_length0.300 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
pin_overall_diameter0.0475 INCHES NOMINAL IN
first_end_taper_angle25.0 DEGREES NOMINAL
first_end_taper_length0.010 INCHES NOMINAL IN
NSN5315-00-089-4942
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 505257 · 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
•
FIRST END TAPER LENGTH: 0.010 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
FIRST END STYLE: CHAMFERED
•
PIN OVERALL LENGTH: 0.300 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
FIRST END TAPER ANGLE: 25.0 DEGREES NOMINAL
•
PIN OVERALL DIAMETER: 0.0475 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END TAPER LENGTH0.010 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
FIRST END STYLECHAMFERED
PIN OVERALL LENGTH0.300 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
FIRST END TAPER ANGLE25.0 DEGREES NOMINAL
PIN OVERALL DIAMETER0.0475 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
209285-008Interchangeable
interchangeable cross-reference
interchangeable
40251Interchangeable
interchangeable cross-reference
interchangeable
505257Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 505257?
505257 is a TRANSISTOR.
What parts can replace 505257?
There are 3 known substitutes for 505257: 209285-008, 40251, 505257. Substitute compatibility should be verified for your specific system.
What is the NSN for 505257?
505257 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-089-4942. 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