Home · FSC 5331 O-Ring · NSN 5331-01-317-3870

NSN 5331-01-317-3870 — O-Ring

NIIN 01-317-3870 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

NSN 5331-01-317-3870 is the national stock number for an o-ring in federal supply class 5331 (O-Ring). It cross-references to 5 manufacturer part numbers from 4 CAGE codes, including Sae International, Fluor Marine Propulsion, LLC, Society Of Automotive Engineers Inc; the primary is 938A813-140. The unit of issue is EA and the FLIS list price is $7.37.

The U.S. government has bought this item 1 time on record, 1 of them in the last 24 months, most recently on September 22, 2026 for $765 from Dbr Industries, Inc.. 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 4 CAGEs

open solicitations, all agencies

government buy 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
AS3578-278	0U583	Sae International	3 · Design control (vendor)	2 · Fully interchangeable
SAE-AS3578	0U583	Sae International	3 · Design control (vendor)	1 · Not fully interchangeable
938A813-140	94259	Fluor Marine Propulsion, LLC	5 · Secondary reference	9 · Reference only
AMS7271	81343	Society Of Automotive Engineers Inc	5 · Secondary reference	9 · Reference only
AMS7271	0U583	Sae International	5 · Secondary reference	9 · Reference only
AS3578-278	81343	Society Of Automotive Engineers Inc	5 · Secondary reference	9 · Reference only
MS9021-278	96906	Military Standards Promulgated By Military Departments Under Authority Of Defense Standardization Manual 4120 3-M	5 · Secondary reference	9 · Reference only

Government demand

Nothing open right now. Last government buy Sep 22, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

Date	Vendor	Qty	Unit cost	Amount	Buyer	Reference
Sep 22, 2026	Dbr Industries, Inc. 1K697			$765	Dla	SPE7L126D62KN

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 1 buy on record in total.

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 938A813-140.

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

DLA management data

FLIS unit price: $7.37
Unit of issue: EA
Acquisition advice: Z — Insurance item
Source of supply: SMS
Shelf life code: Y
Effective: May 1, 2026

Item characteristics

Cross-Sectional Height: INCHES MINIMUM 0.135 AND INCHES MAXIMUM 0.143
Center Hole Diameter: INCHES MINIMUM 11.918 AND INCHES MAXIMUM 12.050
Peripheral Diameter: INCHES NOMINAL 12.262
Elongation Percentage: MAXIMUM 200
Hardness Rating: SHORE DUROMETER A NOMINAL 65.0
Criticality Code Justification: ZZZW
Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Departure From Cited Document: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS

Related stock numbers

Other NSNs filed under the same part numbers.

00-001-4815 · O-Ring
00-005-0668 · O-Ring
00-008-9022 · O-Ring
00-058-0054 · O-Ring
00-060-2682 · O-Ring
00-061-5144 · O-Ring
00-064-4354 · O-Ring
00-080-0706 · O-Ring

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.