42-90-2188 — NUT,SELF-LOCKING,CASTELLATED,HEX

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

42-90-2188: NUT,SELF-LOCKING,CASTELLATED,HEX.

NUT,SELF-LOCKING,CASTELLATED,HEX. Key specifications include material: STEEL OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.445 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-027-9392, 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

42-90-2188

NSN: 5310-01-027-9392
FSC: 5310 — Nuts and Washers
CAGE: 55683 — WHEELER FLEET SOLUTIONS, CO. (USA)

SPECIFICATIONS

material	STEEL OVERALL
nut_style	CASTELLATED, HEXAGON
nut_height	0.445 INCHES NOMINAL IN
thread_class	2B
thread_series	UNF
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
special_features	WASHER SUPPLIED WITH NUT
thread_direction	RIGHT-HAND
width_across_flats	0.940 INCHES NOMINAL IN
nominal_thread_size	0.625 INCHES IN
bearing_surface_type	CHAMFERED
thread_quantity_per_inch	18
NSN	5310-01-027-9392

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.940 INCHES NOMINAL IN

•

THREAD SERIES: UNF

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.625 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

NUT HEIGHT: 0.445 INCHES NOMINAL IN

•

NUT STYLE: CASTELLATED, HEXAGON

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.940 INCHES NOMINAL IN
THREAD SERIES	UNF
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.625 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.445 INCHES NOMINAL IN
SPECIAL FEATURES	WASHER SUPPLIED WITH NUT
NUT STYLE	CASTELLATED, HEXAGON
THREAD CLASS	2B
THREAD QUANTITY PER INCH	18

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

90-2188Reference 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 42-90-2188?

42-90-2188 is a NUT,SELF-LOCKING,CASTELLATED,HEX.

What parts can replace 42-90-2188?

There is 1 known substitute for 42-90-2188: 90-2188. Substitute compatibility should be verified for your specific system.

What is the NSN for 42-90-2188?

42-90-2188 is cataloged in the U.S. Government catalog under NSN 5310-01-027-9392. This indicates validated use in U.S. government and defense supply chains.

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42-90-2188 — NUT,SELF-LOCKING,CASTELLATED,HEX

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