503418 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

503418: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: DOUBLE HEXAGON, temp_rating: 1200.0 FAHRENHEIT NOMINAL DEGF, thread_series: UNF, overall_height: 0.458 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-849-6579, 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

503418

NSN: 5310-00-849-6579
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	DOUBLE HEXAGON
temp_rating	1200.0 FAHRENHEIT NOMINAL DEGF
thread_series	UNF
overall_height	0.458 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
washer_thickness	0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
precious_material	SILVER
surface_treatment	SILVER OVERALL
width_across_flats	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size	0.312 INCHES IN
NSN	5310-00-849-6579

COMPONENT DIAGRAM

KEY FEATURES

•

WASHER OUTSIDE DIAMETER: 0.546 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNF

•

PRECIOUS MATERIAL: SILVER

•

TEMP RATING: 1200.0 FAHRENHEIT NOMINAL DEGF

•

THREAD PITCH DIAMETERS: +0.2884 TO 0.2920 INCHES IN

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.458 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	0.546 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNF
PRECIOUS MATERIAL	SILVER
TEMP RATING	1200.0 FAHRENHEIT NOMINAL DEGF
THREAD PITCH DIAMETERS	+0.2884 TO 0.2920 INCHES IN
WASHER THICKNESS	0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

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

Z6630-054KReference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 503418?

503418 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace 503418?

There is 1 known substitute for 503418: Z6630-054K. Substitute compatibility should be verified for your specific system.

What is the NSN for 503418?

503418 is cataloged in the U.S. Government catalog under NSN 5310-00-849-6579. This indicates validated use in U.S. government and defense supply chains.

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503418 — NUT,SELF-LOCKING,EXTENDED WASHER

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