58729M-428 — NUT,SELF-LOCKING,CASTELLATED,HEX

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

58729M-428: NUT,SELF-LOCKING,CASTELLATED,HEX.

NUT,SELF-LOCKING,CASTELLATED,HEX. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-377-3883, 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

58729M-428

NSN: 5310-00-377-3883
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	CASTELLATED, HEXAGON
nut_height	0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
width_across_flats	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size	0.250 INCHES IN
bearing_surface_type	WASHER FACED
thread_quantity_per_inch	28
material_document_and_classification	AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN	5310-00-377-3883

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.250 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

NUT HEIGHT: 0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN

•

NUT STYLE: CASTELLATED, HEXAGON

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.250 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
NUT STYLE	CASTELLATED, HEXAGON
THREAD CLASS	3B
THREAD QUANTITY PER INCH	28

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 3

4022709Reference document

Same NSN cross-reference

Reference document — Secondary reference

4010647Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

5310PL0723160Reference document

Same NSN cross-reference

Reference document — Informative 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 58729M-428?

58729M-428 is a NUT,SELF-LOCKING,CASTELLATED,HEX.

What parts can replace 58729M-428?

There are 3 known substitutes for 58729M-428: 4022709, 4010647, 5310PL0723160. Substitute compatibility should be verified for your specific system.

What is the NSN for 58729M-428?

58729M-428 is cataloged in the U.S. Government catalog under NSN 5310-00-377-3883. This indicates validated use in U.S. government and defense supply chains.

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58729M-428 — NUT,SELF-LOCKING,CASTELLATED,HEX

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