C21026-4 — NUT,SELF-LOCKING,CAP

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

C21026-4: NUT,SELF-LOCKING,CAP.

The NUT,SELF-LOCKING,CAP is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1050 OR STEEL COMP 4130 NUT, nut_height: 0.425 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-700-8304, 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

C21026-4

NSN: 5310-01-700-8304
FSC: 5310 — Nuts and Washers
CAGE: 9V172 — AERO-GLEN INTERNATIONAL LLC (USA)

SPECIFICATIONS

material	STEEL COMP 1050 OR STEEL COMP 4130 NUT
nut_height	0.425 INCHES MAXIMUM IN
lubrication	DRY FILM LUBRICANT
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM NUT
nominal_thread_size	0.2500 INCHES IN
thread_quantity_per_inch	28
material_document_and_classification	AMS5085 ASSN STD 1ST MATERIAL RESPONSE OR AMS6250 OR AMS6370 ASSN STD 2ND MATERIAL RESPONSE NUT
part_name_assigned_by_controlling_agency	NUT, SELF-LOCKING, DOME, SELF-SEALING, SNAP -ON
surface_treatment_document_and_classification	MS-QQ-P-416 TYPE II CLASS I ASSN STD SINGLE TREATMENT RESPONSE NUT
NSN	5310-01-700-8304

COMPONENT DIAGRAM

KEY FEATURES

•

LUBRICATION: DRY FILM LUBRICANT

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MS-QQ-P-416 TYPE II CLASS I ASSN STD SINGLE TREATMENT RESPONSE NUT

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS-QQ-A-225/9 ASSN STD SINGLE MATERIAL RESPONSE WASHER

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.2500 INCHES IN

•

NUT HEIGHT: 0.425 INCHES MAXIMUM IN

TECHNICAL CHARACTERISTICS

LUBRICATION	DRY FILM LUBRICANT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MS-QQ-P-416 TYPE II CLASS I ASSN STD SINGLE TREATMENT RESPONSE NUT
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATION	AMS-QQ-A-225/9 ASSN STD SINGLE MATERIAL RESPONSE WASHER
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5085 ASSN STD 1ST MATERIAL RESPONSE OR AMS6250 OR AMS6370 ASSN STD 2ND MATERIAL RESPONSE NUT
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.2500 INCHES IN
NUT HEIGHT	0.425 INCHES MAXIMUM IN
SPECIAL FEATURES	SEAL IS MADE OF FLUOROSILICONE RUBBER PER MIL-DTL-25988, TYPE II CLASS 1 GRADE 60 COLOR BLUE; DOME IS MADE OF A286 PER AMS5525, FINISH OF PASSIVATE PER AMS 2700, TYPE II; NUT INCLUDES CAP WITH A HEIGHT OF 0.760 INCH IN
SURFACE TREATMENT	CADMIUM NUT

SUBSTITUTES & CROSS-REFERENCES 1

C21026Reference document

Same NSN cross-reference

Reference document — Drawing number reference only

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is C21026-4?

C21026-4 is a NUT,SELF-LOCKING,CAP.

What parts can replace C21026-4?

There is 1 known substitute for C21026-4: C21026. Substitute compatibility should be verified for your specific system.

What is the NSN for C21026-4?

C21026-4 is cataloged in the U.S. Government catalog under NSN 5310-01-700-8304. This indicates validated use in U.S. government and defense supply chains.

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