55K1-048 — NUT,SELF-LOCKING,CAP

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

55K1-048: NUT,SELF-LOCKING,CAP.

The NUT,SELF-LOCKING,CAP is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: CAP, nut_height: 0.457 INCHES MAXIMUM IN, temp_rating: -65.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-00-222-2989, 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

55K1-048

NSN: 5310-00-222-2989
FSC: 5310 — Nuts and Washers
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)

SPECIFICATIONS

material	PLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_style	CAP
nut_height	0.457 INCHES MAXIMUM IN
temp_rating	-65.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
locking_feature	PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM NUT
width_across_flats	0.500 INCHES NOMINAL IN
nominal_thread_size	0.250 INCHES IN
bearing_surface_type	CHAMFERED OR WASHER FACED
NSN	5310-00-222-2989

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

TEMP RATING: -65.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.250 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.500 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE CAP
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING	-65.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.250 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT	0.457 INCHES MAXIMUM IN
SURFACE TREATMENT	CADMIUM NUT

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

STSCC002-08Reference document

Same NSN cross-reference

Reference document — Vendor item drawing reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 55K1-048?

55K1-048 is a NUT,SELF-LOCKING,CAP.

What parts can replace 55K1-048?

There is 1 known substitute for 55K1-048: STSCC002-08. Substitute compatibility should be verified for your specific system.

What is the NSN for 55K1-048?

55K1-048 is cataloged in the U.S. Government catalog under NSN 5310-00-222-2989. This indicates validated use in U.S. government and defense supply chains.

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