ST2118-09 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

ST2118-09: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.250 INCHES MAXIMUM IN, hardness_rating: 48.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-385-9218, 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

ST2118-09

NSN: 5310-00-385-9218
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
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
overall_height	0.250 INCHES MAXIMUM IN
hardness_rating	48.0 ROCKWELL C MAXIMUM
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
washer_thickness	0.025 INCHES MINIMUM IN
countersink_angle	90.0 DEGREES NOMINAL NUT
width_across_flats	0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
nominal_thread_size	0.190 INCHES IN
NSN	5310-00-385-9218

COMPONENT DIAGRAM

KEY FEATURES

•

WASHER OUTSIDE DIAMETER: 0.311 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

HARDNESS RATING: 48.0 ROCKWELL C MAXIMUM

•

WASHER THICKNESS: 0.025 INCHES MINIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.250 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	0.311 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
HARDNESS RATING	48.0 ROCKWELL C MAXIMUM
WASHER THICKNESS	0.025 INCHES MINIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.190 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN

SUBSTITUTES & CROSS-REFERENCES 7

H49513-3Reference document

Same NSN cross-reference

Reference document — Secondary reference

LH11189-3Reference document

Same NSN cross-reference

Reference document — Secondary reference

4023115Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

ST2113-09Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

5310PL1038918Reference document

Same NSN cross-reference

Reference document — Informative reference only

ST1334-09Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is ST2118-09?

ST2118-09 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace ST2118-09?

There are 7 known substitutes for ST2118-09: H49513-3, LH11189-3, 4023115 and 4 more. Substitute compatibility should be verified for your specific system.

What is the NSN for ST2118-09?

ST2118-09 is cataloged in the U.S. Government catalog under NSN 5310-00-385-9218. This indicates validated use in U.S. government and defense supply chains.

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ST2118-09 — NUT,SELF-LOCKING,EXTENDED WASHER

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