KFN542-4S — NUT,SELF-LOCKING,ASSEMBLED WASHE

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

KFN542-4S: NUT,SELF-LOCKING,ASSEMBLED WASHE.

NUT,SELF-LOCKING,ASSEMBLED WASHE. Key specifications include material: STEEL WASHER, nut_style: FLAT WITH TURNED UP EDGE, temp_rating: 450.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.280 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-221-7020, 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

KFN542-4S

NSN: 5310-01-221-7020
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)

SPECIFICATIONS

material	STEEL WASHER
nut_style	FLAT WITH TURNED UP EDGE
temp_rating	450.0 FAHRENHEIT MAXIMUM DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
overall_height	0.280 INCHES NOMINAL IN
hardness_rating	39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
locking_feature	FREE-RUNNING ALL METAL DESIGN
special_features	WASHER ROCKWELL C SCALE 40.0 MIN AND 45.0 MAXZ USE WITH K-FAST AUTOMATIC TOOL
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM AND CHROMATE OVERALL
width_across_flats	0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
NSN	5310-01-221-7020

COMPONENT DIAGRAM

KEY FEATURES

•

WASHER OUTSIDE DIAMETER: 0.460 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

TEMP RATING: 450.0 FAHRENHEIT MAXIMUM DEGF

•

HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE NUT

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.280 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER	0.460 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING	450.0 FAHRENHEIT MAXIMUM DEGF
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE NUT
NUT COUNTERBORE DEPTH	0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM NUT IN
THREAD DIRECTION	RIGHT-HAND

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

No substitute or cross-reference records for this part.

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 KFN542-4S?

KFN542-4S is a NUT,SELF-LOCKING,ASSEMBLED WASHE.

What is the NSN for KFN542-4S?

KFN542-4S is cataloged in the U.S. Government catalog under NSN 5310-01-221-7020. This indicates validated use in U.S. government and defense supply chains.

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KFN542-4S — NUT,SELF-LOCKING,ASSEMBLED WASHE

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