74640C20 — NUT,PLAIN,SLOTTED,HEXAGON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

74640C20: NUT,PLAIN,SLOTTED,HEXAGON.

The NUT,PLAIN,SLOTTED,HEXAGON is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.625 INCHES NOMINAL IN, temp_rating: 800.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-00-522-9655, 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

74640C20

NSN: 5310-00-522-9655
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)

SPECIFICATIONS

material	IRON ALLOY 660 OVERALL
nut_style	SLOTTED, HEXAGON
nut_height	0.625 INCHES NOMINAL IN
temp_rating	800.0 FAHRENHEIT NOMINAL DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
special_features	DYED BROWN
thread_direction	RIGHT-HAND
countersink_angle	110.0 DEGREES NOMINAL NUT
surface_treatment	PASSIVATE OVERALL
width_across_flats	1.852 INCHES MINIMUM AND 1.877 INCHES MAXIMUM IN
nominal_thread_size	1.250 INCHES IN
NSN	5310-00-522-9655

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 1.852 INCHES MINIMUM AND 1.877 INCHES MAXIMUM IN

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

TEMP RATING: 800.0 FAHRENHEIT NOMINAL DEGF

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 1.250 INCHES IN

•

SPECIFICATION/STANDARD DATA: 76301-ST3-404 MANUFACTURERS STANDARD

•

NUT HEIGHT: 0.625 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	1.852 INCHES MINIMUM AND 1.877 INCHES MAXIMUM IN
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING	800.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	1.250 INCHES IN
SPECIFICATION/STANDARD DATA	76301-ST3-404 MANUFACTURERS STANDARD
NUT HEIGHT	0.625 INCHES NOMINAL IN
SPECIAL FEATURES	DYED BROWN
SURFACE TREATMENT	PASSIVATE OVERALL

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

E10080-20Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

Ready to buy 74640C20?

Compare prices from verified sellers on eBay

Buy on eBay →

As an eBay Partner, PartsTable may earn a commission. Your price is not affected.

FREQUENTLY ASKED QUESTIONS

What is 74640C20?

74640C20 is a NUT,PLAIN,SLOTTED,HEXAGON.

What parts can replace 74640C20?

There is 1 known substitute for 74640C20: E10080-20. Substitute compatibility should be verified for your specific system.

What is the NSN for 74640C20?

74640C20 is cataloged in the U.S. Government catalog under NSN 5310-00-522-9655. This indicates validated use in U.S. government and defense supply chains.

Community Feedback

74640C20 — NUT,PLAIN,SLOTTED,HEXAGON

Request a Quote — 74640C20