ST3M646-12 — NUT,SELF-LOCKING,KNURLED

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

ST3M646-12: NUT,SELF-LOCKING,KNURLED.

The NUT,SELF-LOCKING,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, nut_style: KNURLED, lubrication: DRY FILM LUBRICANT, nut_diameter: 0.383 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.368 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-152-8198, 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

ST3M646-12

NSN: 5310-01-152-8198
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	STEEL COMP XM-13 OVERALL
nut_style	KNURLED
lubrication	DRY FILM LUBRICANT
nut_diameter	0.383 INCHES NOMINAL IN
thread_class	3B
nut_thickness	0.368 INCHES NOMINAL IN
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
nominal_thread_size	0.250 INCHES IN
thread_quantity_per_inch	28
material_document_and_classification	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN	5310-01-152-8198

COMPONENT DIAGRAM

KEY FEATURES

•

LUBRICATION: DRY FILM LUBRICANT

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.250 INCHES IN

•

NUT DIAMETER: 0.383 INCHES NOMINAL IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

NUT THICKNESS: 0.368 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

LUBRICATION	DRY FILM LUBRICANT
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.250 INCHES IN
NUT DIAMETER	0.383 INCHES NOMINAL IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT THICKNESS	0.368 INCHES NOMINAL IN
NUT STYLE	KNURLED
THREAD CLASS	3B

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 2

BB567-12Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

10109833Reference document

Same NSN cross-reference

Reference document — Informative reference only

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 ST3M646-12?

ST3M646-12 is a NUT,SELF-LOCKING,KNURLED.

What parts can replace ST3M646-12?

There are 2 known substitutes for ST3M646-12: BB567-12, 10109833. Substitute compatibility should be verified for your specific system.

What is the NSN for ST3M646-12?

ST3M646-12 is cataloged in the U.S. Government catalog under NSN 5310-01-152-8198. This indicates validated use in U.S. government and defense supply chains.

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