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5310-00-741-1378

Find complete technical information, availability, and procurement data for: 5310-00-741-1378

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5310-00-741-1378
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5310 Nuts and Washers
National Stock Number
5310-00-741-1378
Item Name Code
01869
Assigment Date
01/01/1963 (63 years ago)

A nut, flat on top and bottom, having eight flat sides. It may include a retaining dowel pin. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance).

3.375 inches nominal outside diameter, 1.185 inches nominal distance from centerline to top of internal key, 2.650 inches minimum and 2.660 inches maximum hole diameter, 0.438 inches nominal external straight key width, 0.335 inches minimum and 0.350 inches maximum internal straight key width

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Hole Diameter
2.650 inches minimum and 2.660 inches maximum
Outside Diameter
3.375 inches nominal
External Straight Key Width
0.438 inches nominal
Internal Straight Key Width
0.335 inches minimum and 0.350 inches maximum
Distance From Centerline To Top Of Internal Key
1.185 inches nominal
Overall Distance Including Keys
3.875 inches nominal
External Key Quantity
11
Internal Key Quantity
1
Material Thickness
0.060 inches nominal
End Item Identification
w/s:cargo, trailer, m105a3; chasis, trlr, gp, 3 1/2t, 2-whl, tam d00807; trailer tank, water 400 gal, m149a2; guided missile, intercept; missile, lance; trlr, cargo, 3/4t, 2whl, tam d08607
Material
steel comp 1008 or steel comp 1009 or steel comp 1010 or steel comp 1015 or steel comp 1018 or steel comp 1020 or steel overall
Material Document And Classification
qq-s-698 tp 2 fed spec 1st material response or qq-s-698 tp 2 fed spec 2nd material response or qq-698 tp 2 fed spec 3rd material response or qq-s-698 tp 2 fed spec 4th material response or qq-s-698 tp 2 fed spec 5th material response or qq-s-698 t+2 fed spec 6th material response or qq-s-698 tp 5 fed spec 7th material response overall
Style Designator
key

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
2520-00-344-9867 No Name Available 08/19/1973
5310-00-483-0413 No Name Available 09/27/1972

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number Name
1H227571D Key Washer
20-914 Key Washer
2275710 Key Washer
5310007411378 Key Washer
7411378 Key Washer

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-00-741-1378?
The FSCG of the NSN 5310-00-741-1378 is 5310
Does the NSN 5310-00-741-1378 have a Schedule B code assigned?
Yes, the Schedule B code is 7318220000
Does NSN 5310-00-741-1378 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 5310-00-741-1378 contain precious materials?
Precious metal content is unknown
Does NSN 5310-00-741-1378 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 5310-00-741-1378 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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Pricing

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ITAR Registered

In Stock

This item is currently available and ready for prompt shipment. Units may be offered in various conditions — new, surplus, or refurbished — and stored at verified global facilities. Request a quote to confirm current stock and delivery time.

New Material 4,414
New Surplus 32
Total 4,446
Availability of this item was last updated on: 04/13/2026 01:04 AM EDT. Stock levels and pricing are subject to change.

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