258E391PC23 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

258E391PC23: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: HEXAGON, nut_height: 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5310-00-001-8167, 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

258E391PC23

NSN: 5310-00-001-8167
FSC: 5310 — Nuts and Washers
CAGE: 04241 — FLUOR MARINE PROPULSION, LLC DBA KNOLLS ATOMIC POWER LABORATORY (USA)

SPECIFICATIONS

material	PLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_style	HEXAGON
nut_height	0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN
temp_rating	250.0 FAHRENHEIT NOMINAL DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL COARSE (UNC)
locking_feature	PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_direction	RIGHT-HAND
surface_treatment	PASSIVATE OVERALL EXCEPT INSERT
width_across_flats	0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
nominal_thread_size	0.500 INCHES IN
bearing_surface_type	CHAMFERED
NSN	5310-00-001-8167

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

SPECIAL TEST FEATURES: SPECIAL QUALITY CONTROL TESTING

•

TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-M-20693 MIL SPEC 2ND MATERIAL RESPONSE LOCKING INSERT

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.500 INCHES IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
SPECIAL TEST FEATURES	SPECIAL QUALITY CONTROL TESTING
TEMP RATING	250.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-M-20693 MIL SPEC 2ND MATERIAL RESPONSE LOCKING INSERT
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.500 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT	0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN

SUBSTITUTES & CROSS-REFERENCES 3

SR A4 1/2 UNCReference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

79NE083Reference document

Same NSN cross-reference

Reference document — Secondary reference

590-363Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 258E391PC23?

258E391PC23 is a NUT,SELF-LOCKING,HEXAGON.

What parts can replace 258E391PC23?

There are 3 known substitutes for 258E391PC23: SR A4 1/2 UNC, 79NE083, 590-363. Substitute compatibility should be verified for your specific system.

What is the NSN for 258E391PC23?

258E391PC23 is cataloged in the U.S. Government catalog under NSN 5310-00-001-8167. This indicates validated use in U.S. government and defense supply chains.

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258E391PC23 — NUT,SELF-LOCKING,HEXAGON

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