PartsTable TECHNICAL DATA SHEET

NSN 5310-01-502-4840Government record, cited

Washer, Flat5310-01-502-4840

NSN 5310-01-502-4840 · NIIN 015024840 · Part number 4M398-8

The Boeing Company Div Defense · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 76301

Government record, cited

NSN 5310-01-502-4840 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-502-4840. Manufacturer of record part number: 4M398-8.

Also searched as 5310-01-502-4840 · 5310015024840 · NIIN 015024840 · 01-502-4840 · FSC 5310 Nuts and Washers · CAGE 76301 · 4M398-8

Nearby stock numbers ← 5310-01-502-4839 Washer, Flat · 5310-01-502-4852 Washer, Flat →

5310-01-502-4840 — Nuts and Washers

Features

Washer,flat — FSC 5310
Center Hole Width: 1.387 INCHES NOMINAL IN
Length: 2.011 INCHES NOMINAL IN
Radius at Large End: 0.757 INCHES NOMINAL IN
Criticality Code Justification: AGAV
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: OVAL
Width: 1.514 INCHES NOMINAL IN

Identification

NSN: 5310-01-502-4840
NIIN: 015024840
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 4M398-8
Manufacturer: The Boeing Company Div Defense

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-502-4840, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-502-4840
Primary Part Number	4M398-8
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	The Boeing Company Div Defense
Status	ACTIVE
Center Hole Width	1.387 INCHES NOMINAL IN
Length	2.011 INCHES NOMINAL IN
Radius at Large End	0.757 INCHES NOMINAL IN
Criticality Code Justification	AGAV
Cross-Sectional Shape Style	RECTANGULAR
Peripheral Shape Style	OVAL
Width	1.514 INCHES NOMINAL IN
Material	STEEL CORROSION RESISTING OVERALL
Center Hole Shape Style	DEE
Hole Diameter	1.259 INCHES NOMINAL IN
Radius at Small End	1.254 INCHES NOMINAL IN
Thickness	0.030 INCHES NOMINAL IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	Y

Cross-Reference Index

Part Number	Manufacturer
4M398-8	Cablecraft Motion Controls Llc (USA)
4M398-8 PRIMARY	The Boeing Company Div Defense (USA)

Reference documents

Reference	Meaning
4M398-8	5/2 Secondary reference U.S. Government activity

No interchangeability data on file.

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

5310-00-000-0040 · Item name not on file

5310-00-000-0077

NUT,PLAIN,ROUND

5310-00-000-0079

WASHER,FLAT

5310-00-000-0079

WASHER,FLAT

5310-00-000-1146

5310-00-000-1146 · Item name not on file

5310-00-000-3815

5310-00-000-3815 · Item name not on file

5310-00-000-4532

5310-00-000-4532 · Item name not on file

5310-00-000-4540

5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-502-4840?

NSN 5310-01-502-4840 is a Washer,flat, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-502-4840?

NSN 5310-01-502-4840 has 2 manufacturer part numbers on file: 4M398-8 (Cablecraft Motion Controls Llc), 4M398-8 (The Boeing Company Div Defense).

What are the specifications of 4M398-8?

Key specifications for 4M398-8: Center Hole Width: 1.387 INCHES NOMINAL IN; Length: 2.011 INCHES NOMINAL IN; Radius at Large End: 0.757 INCHES NOMINAL IN; Criticality Code Justification: AGAV. 12 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-502-4840 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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