Home · FSC 5331 O-Ring · NSN 5331-01-661-4407

NSN 5331-01-661-4407 — O-Ring

NIIN 01-661-4407 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 5 government buys since 2019

The government has bought this item about every 9 months (irregular, gaps vary ±106%). Last buy Jan 8, 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 5331-01-661-4407 is the national stock number for an o-ring in federal supply class 5331 (O-Ring). It cross-references to 1 manufacturer part number from 2 CAGE codes, including Parker-Hannifin Corporation, Birdon Pty Ltd; the primary is RK11350. The unit of issue is EA and the FLIS list price is $16.42.

The U.S. government has bought this item 6 times on record, 4 of them in the last 24 months, most recently on January 8, 2026 at $11.48 each from Direct Line, Inc. The median unit price paid over 36 months is $11.50. 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.

1

part number from 2 CAGEs

0

open solicitations, all agencies

4

government buys in 24 months · median $11.50

0

sellers with confirmed stock

Watch NSN 5331-01-661-4407: 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
RK1135055752Parker-Hannifin Corporation3 · Design control (vendor)2 · Fully interchangeable
RK11350Z0PP1Birdon Pty Ltd5 · Secondary reference2 · Fully interchangeable

Government demand

Nothing open right now. Last government buy Jan 8, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Jan 8, 2026Direct Line, Inc 0GE52234$11.48DlaSPE7L026F1231
Apr 29, 2025Aer Supply, Ltd. 3TXD4276$11.25DlaSPE7L125P5830
Apr 8, 2025Aer Supply, Ltd. 3TXD4117$11.50DlaSPE7L125P5226
Jan 10, 2025Neal Supply And Rental, LLC 99V4384$13.85DlaSPE7L125V3340
Mar 20, 2024Neal Supply And Rental, LLC 99V4335$13.85DlaSPE7L124V4366
Nov 18, 2019Jgils, LLC 1N8T820$31.44DlaSPE5E820P0602

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 6 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 RK11350.

Request RK11350

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
$16.42
Unit of issue
EA
Acquisition advice
Z — Insurance item
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Part Name Assigned By Controlling Agency
T-HANDLE O-RING KIT

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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