Home · NSN 01-319-0021

NSN 01-319-0021 — Bearing,Ball,Annular

NIIN 01-319-0021 · unit of issue EA · AAC D (stocked, centrally managed (dla)) · source of supply NRP

NSN 01-319-0021 is the national stock number for a bearing,ball,annular. It cross-references to 4 manufacturer part numbers from 5 CAGE codes, including Schaeffler Aerospace Usa Corp, Hansome Energy Systems Inc, Timken Co; the primary is A-509-278 ITEM NO 33. The unit of issue is EA and the FLIS list price is $9,720.00.

No government purchase of this stock number is on our record yet. No seller has confirmed stock of it here in the last 60 days; watching the number is free and the first listing triggers an alert.

part numbers from 5 CAGEs

open solicitations, all agencies

government buys in 24 months

sellers with confirmed stock

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Cross-references

Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.

Part number	CAGE	Manufacturer	Reference	Variation
M17931-G087	70854	Schaeffler Aerospace Usa Corp	3 · Design control (vendor)	1 · Not fully interchangeable
M17931-G087	51802	Hansome Energy Systems Inc	3 · Design control (vendor)	1 · Not fully interchangeable
M17931-G087	21335	Timken Co	3 · Design control (vendor)	1 · Not fully interchangeable
M17931-G087	81349	Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M	4	1 · Not fully interchangeable
A-509-278 ITEM NO 33	51802	Hansome Energy Systems Inc	5 · Secondary reference	1 · Not fully interchangeable
A-509-278 ITEM NO 33NT	03950	Naval Inventory Control Point Mechanicsburg	5 · Secondary reference	1 · Not fully interchangeable
M17931-G087NT	03950	Naval Inventory Control Point Mechanicsburg	5 · Secondary reference	1 · Not fully interchangeable

Government demand

Nothing open right now. Watch this NSN and we will email you when it is solicited.

What the government paid

No government purchase on record for this NSN.

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices.

Sellers with confirmed stock

No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on A-509-278 ITEM NO 33.

Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.

DLA management data

FLIS unit price: $9,720.00
Unit of issue: EA
Acquisition advice: D — Stocked, centrally managed (DLA)
Source of supply: NRP
Shelf life code: X
Effective: Oct 1, 2025

Item characteristics

Overall Width: INCHES NOMINAL 1.9685
Bore Diameter: INCHES MINIMUM 4.3304 AND INCHES MAXIMUM 4.3307
Overall Outside Diameter: INCHES MINIMUM 9.4485 AND INCHES MAXIMUM 9.4488
Surface Finish: GROUND
Load Direction: RADIAL
Bore Shape: STRAIGHT
Criticality Code Justification: ZZZW
Special Features: LOCKNUT RETAINED
Material: OVERALL CHROMIUM ALLOY
Material Document And Classification: OVERALL ASSN STD SINGLE MATERIAL RESPONSE AST- A 295
Departure From Cited Document: ANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE

About this page

An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.