Home · FSC 5331 O-Ring · NSN 5331-00-166-8405

NSN 5331-00-166-8405 — O-Ring

NIIN 00-166-8405 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 13 government buys since 2019

The government has bought this item about every 4 months (irregular, gaps vary ±125%). Last buy May 11, 2026. The gaps are too uneven to put a window on the next one.

How well this works: for irregular items, "next buy about one typical gap after the last, give or take 151 days" caught the actual next buy 31% of the time across 21,161 past buys, against 24% for a fixed "one year later" guess. A rhythm, not a schedule: DLA buys when stock and demand say so. Every item due for a buy now.

NSN 5331-00-166-8405 is the national stock number for an o-ring in federal supply class 5331 (O-Ring). It cross-references to 55 manufacturer part numbers from 29 CAGE codes, including Parker-Hannifin Corp, Sae International, Wass Submarine Systems S.R.L.; the primary is 004218. The unit of issue is EA and the FLIS list price is $0.60.

The U.S. government has bought this item 20 times on record, 2 of them in the last 24 months, most recently on June 1, 2026 at $0.74 each from Blade Industrial Products Inc. The median unit price paid over 36 months is $0.71. 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.

55

part numbers from 29 CAGEs

0

open solicitations, all agencies

2

government buys in 24 months · median $0.71

0

sellers with confirmed stock

Watch NSN 5331-00-166-8405: an email the morning the government solicits or buys it, or an AD names it. Free.
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Cross-references

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

Part numberCAGEManufacturerReferenceVariation
2-218V0747-7502697Parker-Hannifin Corp3 · Design control (vendor)2 · Fully interchangeable
2-218V1164-7502697Parker-Hannifin Corp3 · Design control (vendor)2 · Fully interchangeable
2-218V1226-7502697Parker-Hannifin Corp3 · Design control (vendor)2 · Fully interchangeable
AS3209-2180U583Sae International3 · Design control (vendor)2 · Fully interchangeable
SAE-AMS72760U583Sae International3 · Design control (vendor)1 · Not fully interchangeable
1N141300134A2309Wass Submarine Systems S.R.L.5 · Secondary reference2 · Fully interchangeable
2-218 V747-7502697Parker-Hannifin Corp5 · Secondary reference9 · Reference only
2-218 V747-75C0308Parker Hannifin Gmbh O-Ring Division5 · Secondary reference9 · Reference only
21090 FIND 2178062Sargent Aerospace & Defense, LLC5 · Secondary reference2 · Fully interchangeable
21340 FIND 4378062Sargent Aerospace & Defense, LLC5 · Secondary reference2 · Fully interchangeable
216-D-2 ITEM 765511Norco Products Inc Filter Div5 · Secondary reference9 · Reference only
218-19357D7040Trelleborg Sealing Solutions Germany Gmbh5 · Secondary reference2 · Fully interchangeable
218-1935725184Parker Hannifin Corporation Div O-Ring Division5 · Secondary reference2 · Fully interchangeable
3799813 FIND 2359364Honeywell International Inc.5 · Secondary reference2 · Fully interchangeable
55665511Norco Products Inc Filter Div5 · Secondary reference9 · Reference only
80D-C-211 PIECE 2359958Cleveland Gear Company, Inc.5 · Secondary reference9 · Reference only
845-7286652 ITEM 3553711Naval Sea Systems Command5 · Secondary reference2 · Fully interchangeable
AJ0313403530HA0F0559Safran Filtration Systems5 · Secondary reference2 · Fully interchangeable
AS3085-2180U583Sae International5 · Secondary reference9 · Reference only
AS3085-21881343Society Of Automotive Engineers Inc5 · Secondary reference9 · Reference only
AS3209-2181K697Dbr Industries, Inc.5 · Secondary reference1 · Not fully interchangeable
AS3209-21877445Rtx Corporation5 · Secondary reference2 · Fully interchangeable
AS3209-21881343Society Of Automotive Engineers Inc5 · Secondary reference9 · Reference only
J221P21899207General Electric Company5 · Secondary reference2 · Fully interchangeable
J221P21807482General Electric Company5 · Secondary reference2 · Fully interchangeable
M83248/1-21881349Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only
M83248/1-21881343Society Of Automotive Engineers Inc5 · Secondary reference9 · Reference only
M83248/1-218H2313Eriks B.V.5 · Secondary reference9 · Reference only
M83248/1-21874703Lockheed Martin Aeronautical Systems Support Company Dba Lmassc5 · Secondary reference2 · Fully interchangeable
MILR8324881349Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only
NAS1593-21880205National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use5 · Secondary reference2 · Fully interchangeable
PRP218 V747-7525184Parker Hannifin Corporation Div O-Ring Division5 · Secondary reference2 · Fully interchangeable
Z1057AS59958Cleveland Gear Company, Inc.5 · Secondary reference9 · Reference only
10163213A486GNimikkeistokeskus Ncb Finland69 · Reference only
5331PL09624759009HJednolity Indeks Materialowy - Uniform Material Index69 · Reference only
5331PL21303609009HJednolity Indeks Materialowy - Uniform Material Index69 · Reference only
004218D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
14401595-84D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
170-41715 ITEM 1207270Moog Inc.C1 · Not fully interchangeable
2-218V884-7502697Parker-Hannifin CorpC1 · Not fully interchangeable
20A11-X-M-218D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
26472-21PC631923Todd Combustion IncC1 · Not fully interchangeable
32218D07270Moog Inc.C1 · Not fully interchangeable
3422RA PIECE 1978062Sargent Aerospace & Defense, LLCC1 · Not fully interchangeable
398-218-72D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
556-7106779-13 4253711Naval Sea Systems CommandC1 · Not fully interchangeable
581-6726888 FIND 2553711Naval Sea Systems CommandC1 · Not fully interchangeable
700-218-433C10941Carver Pump CompanyC1 · Not fully interchangeable
999-4208-A-09 REV 4 ITEM 89D10941Carver Pump CompanyC1 · Not fully interchangeable
999-4208-A-09-89D10941Carver Pump CompanyC1 · Not fully interchangeable
APR568-218MILR2 5987D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
AS568-218-75VT02697Parker-Hannifin CorpC1 · Not fully interchangeable
BACP11P21881205The Boeing CompanyC1 · Not fully interchangeable
D-42060 PC3231923Todd Combustion IncC1 · Not fully interchangeable
ENDM123861 FIND A3-1196169Electric Boat CorporationC1 · Not fully interchangeable
H792-8002-1396169Electric Boat CorporationC1 · Not fully interchangeable
H792-8002-6396169Electric Boat CorporationC1 · Not fully interchangeable
M83248-1-1-218D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
M83248/1-218D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
MILR83248/1-218D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
PL6573985 REV C FIND NO.2953711Naval Sea Systems CommandC1 · Not fully interchangeable
PRP-568-218D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
R-8-29-27D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
RPR568-218-9009 -75D9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
Z1057ADD9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable
Z1057AWD9182Zf Industrieantriebe Witten GmbhC1 · Not fully interchangeable

Government demand

Nothing open right now. Last government buy Jun 1, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Jun 1, 2026Blade Industrial Products Inc 1JYT1962$0.74DlaSPE7M426V3935
May 11, 2026Blade Industrial Products Inc 1JYT11,624$0.69DlaSPE7M426P3008
May 30, 2023Boeing Distribution Services, Inc. 2V4842,263$0.58DlaSPE7M423V3486
Jan 12, 2023Dbr Industries, Inc. 1K6974,030$0.48DlaSPE7M423V1520
Oct 4, 2022Boeing Distribution Services, Inc. 2V4841,720$0.43DlaSPE7M123V0030
Jan 31, 2022Boeing Distribution Services, Inc. 2V4841,380$0.35DlaSPE7M522V3593
Oct 18, 2021Blade Industrial Products Inc 1JYT11,316$0.36DlaSPE7M522V0957
Aug 20, 2021Dbr Industries, Inc. 1K6971,107$0.38DlaSPE7L121V6323
Apr 22, 2021Blade Industrial Products Inc 1JYT11,002$0.41DlaSPE7L121V4399
Feb 3, 2021Boeing Distribution Services, Inc. 2V484496$0.49DlaSPE7L121V2895
Apr 3, 2020Dbr Industries, Inc. 1K697442$0.25DlaSPE5EY20F8846
Apr 3, 2020Dbr Industries, Inc. 1K697140$0.25DlaSPE5EY20F8845
Apr 3, 2020Dbr Industries, Inc. 1K6975$0.25DlaSPE5EY20F8844
Jan 16, 2020Dbr Industries, Inc. 1K697122$0.25DlaSPE5EY20F6051
Jan 16, 2020Dbr Industries, Inc. 1K69778$0.25DlaSPE5EY20F6050
Dec 17, 2019Dbr Industries, Inc. 1K697849$0.25DlaSPE5EY20F4692
Dec 17, 2019Dbr Industries, Inc. 1K697434$0.25DlaSPE5EY20F4691
Dec 17, 2019Dbr Industries, Inc. 1K697105$0.25DlaSPE5EY20F4690
Mar 15, 2019Dbr Industries, Inc. 1K697216$0.25DlaSPE5EY19F019E
Mar 15, 2019Dbr Industries, Inc. 1K697200$0.25DlaSPE5EY19F019D

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 20 buys 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 004218.

Request 004218

No account needed. Goes to the sellers who carry this number or its family.

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

DLA management data

FLIS unit price
$0.60
Unit of issue
EA
Acquisition advice
Z — Insurance item
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Outside Diameter
INCHES MINIMUM 1.492 AND INCHES MAXIMUM 1.532
Cross-Sectional Height
INCHES MINIMUM 0.135 AND INCHES MAXIMUM 0.143
Center Hole Diameter
INCHES MINIMUM 1.222 AND INCHES MAXIMUM 1.246
Elongation Percentage
MAXIMUM 125
Hardness Rating
SHORE DUROMETER A NOMINAL 75.0
Material
RUBBER FLUOROCARBON CLASS FPM

Related stock numbers

Other NSNs filed under the same part numbers.

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.

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