6391389-1 — WASHER,CONCAVE

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

6391389-1: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 6.750 INCHES NOMINAL IN, material: STEEL COMP A2 OVERALL, hole_diameter: 3.120 INCHES NOMINAL IN, outside_diameter: 4.310 INCHES NOMINAL IN, special_features: DRAWING CALLS THIS: WASHER - HALF SPHERICAL CONCAVE, SUPPORT POST, style_designator: CONCAVE. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-508-0126, 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

6391389-1

NSN: 5310-01-508-0126
FSC: 5310 — Nuts and Washers
CAGE: 31442 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)

SPECIFICATIONS

radius	6.750 INCHES NOMINAL IN
material	STEEL COMP A2 OVERALL
hole_diameter	3.120 INCHES NOMINAL IN
outside_diameter	4.310 INCHES NOMINAL IN
special_features	DRAWING CALLS THIS: WASHER - HALF SPHERICAL CONCAVE, SUPPORT POST
style_designator	CONCAVE
material_thickness	0.660 INCHES NOMINAL IN
supplementary_features	BOTH TOP AND BOTTOM OUTER EDGES ARE CHAMFERED 0.06 INCH X 45 DEGREES IN
end_item_identification	ASDS
NSN	5310-01-508-0126

COMPONENT DIAGRAM

KEY FEATURES

•

RADIUS: 6.750 INCHES NOMINAL IN

•

SUPPLEMENTARY FEATURES: BOTH TOP AND BOTTOM OUTER EDGES ARE CHAMFERED 0.06 INCH X 45 DEGREES IN

•

STYLE DESIGNATOR: CONCAVE

•

OUTSIDE DIAMETER: 4.310 INCHES NOMINAL IN

•

MATERIAL THICKNESS: 0.660 INCHES NOMINAL IN

•

MATERIAL: STEEL COMP A2 OVERALL

TECHNICAL CHARACTERISTICS

RADIUS	6.750 INCHES NOMINAL IN
SUPPLEMENTARY FEATURES	BOTH TOP AND BOTTOM OUTER EDGES ARE CHAMFERED 0.06 INCH X 45 DEGREES IN
STYLE DESIGNATOR	CONCAVE
OUTSIDE DIAMETER	4.310 INCHES NOMINAL IN
MATERIAL THICKNESS	0.660 INCHES NOMINAL IN
SPECIAL FEATURES	DRAWING CALLS THIS: WASHER - HALF SPHERICAL CONCAVE, SUPPORT POST
END ITEM IDENTIFICATION	ASDS
MATERIAL	STEEL COMP A2 OVERALL
HOLE DIAMETER	3.120 INCHES NOMINAL IN

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

6391389Reference document

Same NSN cross-reference

Reference document — Drawing number 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 6391389-1?

6391389-1 is a WASHER,CONCAVE.

What parts can replace 6391389-1?

There is 1 known substitute for 6391389-1: 6391389. Substitute compatibility should be verified for your specific system.

What is the NSN for 6391389-1?

6391389-1 is cataloged in the U.S. Government catalog under NSN 5310-01-508-0126. This indicates validated use in U.S. government and defense supply chains.

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6391389-1 — WASHER,CONCAVE

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