D52Z8691-6 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

D52Z8691-6: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 1137 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.454 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-756-4026, 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

D52Z8691-6

NSN: 5310-00-756-4026
FSC: 5310 — Nuts and Washers
CAGE: 019L2 — ESNA, LLC (USA)

SPECIFICATIONS

material	STEEL COMP 1137 OVERALL
nut_style	DOUBLE HEXAGON
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
overall_height	0.454 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
special_features	CHROMIC ACID DIPPED
thread_direction	RIGHT-HAND
washer_thickness	0.080 INCHES NOMINAL IN
surface_treatment	CADMIUM OVERALL
width_across_flats	0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_size	0.375 INCHES IN
NSN	5310-00-756-4026

COMPONENT DIAGRAM

KEY FEATURES

•

WASHER OUTSIDE DIAMETER: 0.598 INCHES MAXIMUM IN

•

WIDTH ACROSS FLATS: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

WASHER THICKNESS: 0.080 INCHES NOMINAL IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5024 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.454 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER	0.598 INCHES MAXIMUM IN
WIDTH ACROSS FLATS	0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
WASHER THICKNESS	0.080 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5024 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.375 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN

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

3012157Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 D52Z8691-6?

D52Z8691-6 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace D52Z8691-6?

There is 1 known substitute for D52Z8691-6: 3012157. Substitute compatibility should be verified for your specific system.

What is the NSN for D52Z8691-6?

D52Z8691-6 is cataloged in the U.S. Government catalog under NSN 5310-00-756-4026. This indicates validated use in U.S. government and defense supply chains.

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