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5310-00-178-0449

Concave Washer

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Featured Parts

1788027-1
5340-00-163-9789
Retaining Strap
1788033
5310-00-616-2810
Spring Tension Washer
1788037
5330-00-673-7937
Seal
1788039
5315-00-584-3527
Headless Straight Pin
1788045
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Valve Disk
1788060
5340-00-494-9865
Helical Compression Spring Seat
1788064
5360-00-702-4721
Compression Helical Spring
1788066
5315-00-673-7920
Headless Straight Pin

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Official Item Classification

Name
Concave Washer
(NSN) National Stock Number
5310-00-178-0449
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5310 Nuts and Washers
(INC) Item Name Code
15930
(FIIG) Federal Item Identification Guide
A022B0
Date
02/24/1973 (53 years ago)

1.250 inches nominal outside diameter, 0.312 inches nominal material thickness, 0.164 inches nominal recess depth, 0.750 inches nominal hole diameter, 0.903 inches minimum and 0.913 inches maximum radius

Specs & Compatibility

Hole Diameter

0.750 inches nominal

Radius

0.903 inches minimum and 0.913 inches maximum

Outside Diameter

1.250 inches nominal

Recess Depth

0.164 inches nominal

Material Thickness

0.312 inches nominal

Material

steel comp 303 overall

Material Document And Classification

astm a582,cond a assn std single material response overall

Surface Treatment

passivate overall

Surface Treatment Document And Classification

mil-f-14072 e300 mil spec single treatment response overall

Style Designator

concave

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0015930

Related Hardware Products

Part Number Description
457925-1 Concave Washer

Frequently Asked Questions

What is the FSCG of the NSN 5310-00-178-0449?
The FSCG of the NSN 5310-00-178-0449 is 5310
Does the NSN 5310-00-178-0449 have a Schedule B code assigned?
Yes, the Schedule B code is 7318220000
Does NSN 5310-00-178-0449 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5310-00-178-0449 contain precious materials?
Precious metal content is unknown
Does NSN 5310-00-178-0449 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5310-00-178-0449 was assigned to the Federal Catalog?
It was assigned 53 years ago, on Sat, Feb 24, 1973