Home · FSC 4820 Valves, Nonpowered · NSN 4820-01-439-0288

NSN 4820-01-439-0288 — Valve,Proportional

NIIN 01-439-0288 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 10 government buys since 2020

The government has bought this item about every 4 months (irregular, gaps vary ±102%). Last buy Aug 11, 2026. 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 152 days" caught the actual next buy 31% of the time across 21,749 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 4820-01-439-0288 is the national stock number for a valve,proportional in federal supply class 4820 (Valves, Nonpowered). It cross-references to 1 manufacturer part number from 1 CAGE code, including Honeywell International Inc.; the primary is 3605239-2. The unit of issue is EA and the FLIS list price is $3,364.28.

The U.S. government has bought this item 12 times on record, 4 of them in the last 24 months, most recently on August 25, 2026 at $2,735.00 each from Avair, LLC. The median unit price paid over 36 months is $2,735.00. 1 solicitation is open right now, the soonest due September 29, 2026 for 8 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.

part number from 1 CAGE

open solicitation, all agencies

government buys in 24 months · median $2,735.00

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
3605239-2	99193	Honeywell International Inc.	3 · Design control (vendor)	2 · Fully interchangeable

Government demand

Open DLA RFQs (DIBBS)

SPE4A526T432T · 8 EA · due Sep 29, 2026 · N · AMSC C · DIBBS

What the government paid

Date	Vendor	Qty	Unit cost	Amount	Buyer	Reference
Aug 25, 2026	Avair, LLC 3KEA7	1	$2,735.00		Dla	SPE4A526P7568
Aug 25, 2026	Avair, LLC 3KEA7			$2,735	Dla	SPE4A526P7568
Aug 11, 2026	Avair, LLC 3KEA7	2	$2,735.00		Dla	SPE4A526P7235
Apr 9, 2026	Avair, LLC 3KEA7	5	$2,750.00		Dla	SPE4A526P4160
Sep 15, 2024	Honeywell International Inc. 99193	10	$1,329.27		Dla	SPE4A124F1473
Jul 12, 2022	Honeywell International Inc. 99193	11	$1,175.25		Dla	SPE4A522F075C
Feb 23, 2021	Honeywell International Inc. 99193	13	$1,175.25		Dla	SPE4A521F6593
Jan 13, 2021	Honeywell International Inc. 99193	5	$1,175.25		Dla	SPE4A521F4653
Dec 2, 2020	Honeywell International Inc. 99193	6	$1,175.25		Dla	SPE4A521F2945
Nov 3, 2020	Honeywell International Inc. 99193	8	$1,175.25		Dla	SPE4A521F1278
Feb 25, 2020	Honeywell International Inc. 99193	5	$1,175.25		Dla	SPE4A520F028F
Jan 22, 2020	Honeywell International Inc. 99193	5	$1,175.25		Dla	SPE4A520F8364

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 12 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 3605239-2.

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

DLA management data

FLIS unit price: $3,364.28
Unit of issue: EA
Acquisition advice: Z — Insurance item
Source of supply: SMS
Effective: Oct 1, 2025

Item characteristics

End Item Identification: FIXED WING AIRCRAFT, HERCULES MODEL C-130J

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.