740745-1 — NUT,SELF-LOCKING,CASTELLATED,HEX

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

740745-1: NUT,SELF-LOCKING,CASTELLATED,HEX.

NUT,SELF-LOCKING,CASTELLATED,HEX. Key specifications include material: STEEL OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.400 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, hardness_rating: 31.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-147-6040, 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

740745-1

NSN: 5310-00-147-6040
FSC: 5310 — Nuts and Washers
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)

SPECIFICATIONS

material	STEEL OVERALL
nut_style	CASTELLATED, HEXAGON
nut_height	0.400 INCHES NOMINAL IN
thread_class	2B
thread_series	UNF
hardness_rating	31.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
width_across_flats	0.986 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN
nominal_thread_size	0.625 INCHES IN
bearing_surface_type	CHAMFERED
thread_quantity_per_inch	18
NSN	5310-00-147-6040

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.986 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN

•

THREAD SERIES: UNF

•

HARDNESS RATING: 31.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM

•

MATERIAL DOCUMENT AND CLASSIFICATION: HS178,FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE OR HS279,FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE OR HS1075,FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.625 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

NUT HEIGHT: 0.400 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.986 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN
THREAD SERIES	UNF
HARDNESS RATING	31.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	HS178,FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE OR HS279,FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE OR HS1075,FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.625 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.400 INCHES NOMINAL IN
NUT STYLE	CASTELLATED, HEXAGON
THREAD CLASS	2B

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

746471-1Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 740745-1?

740745-1 is a NUT,SELF-LOCKING,CASTELLATED,HEX.

What parts can replace 740745-1?

There is 1 known substitute for 740745-1: 746471-1. Substitute compatibility should be verified for your specific system.

What is the NSN for 740745-1?

740745-1 is cataloged in the U.S. Government catalog under NSN 5310-00-147-6040. This indicates validated use in U.S. government and defense supply chains.

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740745-1 — NUT,SELF-LOCKING,CASTELLATED,HEX

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