Home · FSC 5331 O-Ring · NSN 5331-01-385-3444

NSN 5331-01-385-3444 — O-Ring

NIIN 01-385-3444 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 9 government buys since 2016

The government has bought this item about every 7 months (irregular, gaps vary ±107%). Last buy Dec 11, 2024. The gaps are too uneven to put a window on the next one. 1 solicitation is open right now.

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 5331-01-385-3444 is the national stock number for an o-ring in federal supply class 5331 (O-Ring). It cross-references to 3 manufacturer part numbers from 3 CAGE codes, including Society Of Automotive Engineers Inc, Sae International, Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M; the primary is AMS-R-83485/1. The unit of issue is EA and the FLIS list price is $0.81.

The U.S. government has bought this item 15 times on record, 1 of them in the last 24 months, most recently on December 11, 2024 at $0.58 each from Blade Industrial Products Inc. The median unit price paid over 36 months is $0.58. 1 solicitation is open right now, the soonest due October 5, 2026 for 435 EA. 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.

3

part numbers from 3 CAGEs

1

open solicitation, all agencies

1

government buy in 24 months · median $0.58

0

sellers with confirmed stock

Watch NSN 5331-01-385-3444: 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
M83485/1-90781343Society Of Automotive Engineers Inc3 · Design control (vendor)9 · Reference only
M83485/1-9070U583Sae International3 · Design control (vendor)2 · Fully interchangeable
SAE-AS834850U583Sae International3 · Design control (vendor)1 · Not fully interchangeable
AMS-R-83485/181343Society Of Automotive Engineers Inc5 · Secondary reference9 · Reference only
AMS-R-83485/10U583Sae International5 · Secondary reference1 · Not fully interchangeable
M83485/1-90781349Military Specifications Promulgated By Military Departments/Agencies Under Authority Of Defense Standardization Manual 4120 3-M5 · Secondary reference9 · Reference only

Government demand

Open DLA RFQs (DIBBS)

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Dec 11, 2024Blade Industrial Products Inc 1JYT1639$0.58DlaSPE7L325V1616
Jun 12, 2023Blade Industrial Products Inc 1JYT12,586$0.45DlaSPE7L123V6860
Apr 24, 2023Boeing Distribution Services, Inc. 2V4841,072$0.51DlaSPE7L123V5533
Jan 6, 2023Hupp & Associates Inc 0JT27514$0.42DlaSPE7L223V0815
Jul 24, 2019Blade Industrial Products Inc 1JYT11,926$0.28DlaSPE5E819V7350
Feb 7, 2018Blade Industrial Products Inc 1JYT11,000$0.28DlaSPE5E918P1115
Dec 6, 2017Blade Industrial Products Inc 1JYT11,056$0.28DlaSPE5E818V2021
Jan 10, 2017Edison Industrial Research, Inc. 79YS0150$0.48DlaSPE5E817V2624
Nov 28, 2016Edison Industrial Research, Inc. 79YS0120$0.49DlaSPE5E817V1642
Apr 25, 2016Edison Industrial Research, Inc. 79YS0218$0.52DlaSPE5E816V4507
Dec 18, 2015Boeing Distribution Services X, Inc. 2N935295$0.85DlaSPE5E816V1787
Aug 3, 2015Blade Industrial Products Inc 1JYT1295$0.89DlaSPE5E815V7271
Feb 13, 2014Excel Components LLC 6SL20225$0.91DlaSPE5E814V2683
Sep 18, 2013Excel Components LLC 6SL2059$1.91DlaSPE5E813V0151
Mar 31, 2011Porter Seal Company 4F04450$1.70DlaSPM5M211M1515

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 15 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 AMS-R-83485/1.

Request AMS-R-83485/1

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
$0.81
Unit of issue
EA
Acquisition advice
Z — Insurance item
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Cross-Sectional Height
INCHES MINIMUM 0.079 AND INCHES MAXIMUM 0.085
Center Hole Diameter
INCHES MINIMUM 0.523 AND INCHES MAXIMUM 0.537
Hardness Rating
SHORE DUROMETER A MINIMUM 70.0 AND SHORE DUROMETER A MAXIMUM 80.0
Material
RUBBER FLUOROCARBON CLASS FPM
Material Document And Classification
MIL SPEC SINGLE MATERIAL RESPONSE -IL-R-83485, TY 1, CL 10R2
Specification/Standard Data
GOVERNMENT SPECIFICATION 81349--IL-R-83485

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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