Home · FSC 4820 Valves, Nonpowered · NSN 4820-01-145-5907

NSN 4820-01-145-5907 — Valve,Check

NIIN 01-145-5907 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

Buying rhythm

from 12 government buys since 2017

The government has bought this item about every 5 months (loose, gaps vary ±86%). Last buy Jul 22, 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 loose items, "next buy about one typical gap after the last, give or take 136 days" caught the actual next buy 37% of the time across 34,631 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 4820-01-145-5907 is the national stock number for a valve,check in federal supply class 4820 (Valves, Nonpowered). It cross-references to 8 manufacturer part numbers from 3 CAGE codes, including The Boeing Company, Meggitt North Hollywood Inc, Bahr Machine Company Inc; the primary is 420945. The unit of issue is EA and the FLIS list price is $4,337.51.

The U.S. government has bought this item 19 times on record, 4 of them in the last 24 months, most recently on July 22, 2026 at $3,291.55 each from Bahr Machine Company Inc. The median unit price paid over 36 months is $3,291.55. 1 solicitation is open right now, the soonest due October 5, 2026 for 51 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.

8

part numbers from 3 CAGEs

1

open solicitation, all agencies

4

government buys in 24 months · median $3,291.55

0

sellers with confirmed stock

Watch NSN 4820-01-145-5907: an email the morning the government solicits or buys it, or an AD names it. Free.
Know someone who should see this?

Cross-references

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

Part numberCAGEManufacturerReferenceVariation
458-50004-50382918The Boeing Company1 · Design control2 · Fully interchangeable
420945-479318Meggitt North Hollywood Inc3 · Design control (vendor)9 · Reference only
458-50004-50375201Bahr Machine Company Inc3 · Design control (vendor)2 · Fully interchangeable
458-50004-50379318Meggitt North Hollywood Inc3 · Design control (vendor)2 · Fully interchangeable
8100-175201Bahr Machine Company Inc3 · Design control (vendor)2 · Fully interchangeable
42094579318Meggitt North Hollywood Inc5 · Secondary reference9 · Reference only
420945-179318Meggitt North Hollywood Inc5 · Secondary reference9 · Reference only
420945-279318Meggitt North Hollywood Inc5 · Secondary reference9 · Reference only
458-50004-182918The Boeing Company5 · Secondary reference9 · Reference only
458-50004-50282918The Boeing Company5 · Secondary reference9 · Reference only

Government demand

Open DLA RFQs (DIBBS)

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Jul 22, 2026Bahr Machine Company Inc 7520176$3,291.55DlaSPE7MC26P3154
Oct 17, 2025Bahr Machine Company Inc 7520141$3,195.65DlaSPE7M126F0376
Jun 18, 2025Bahr Machine Company Inc 7520125$3,305.45DlaSPE7M125F2320
Dec 12, 2024Bahr Machine Company Inc 7520127$3,305.45DlaSPE7M125F0650
Jul 31, 2024Bahr Machine Company Inc 7520140$3,075.85DlaSPE7M124F3405
May 18, 2023Bahr Machine Company Inc 7520135$2,955.45DlaSPE7M123F5332
Dec 20, 2022Bahr Machine Company Inc 7520120$3,085.75DlaSPE7M123F2658
Dec 20, 2022Bahr Machine Company Inc 7520127$3,085.75DlaSPE7M123F0766
Aug 5, 2022Bahr Machine Company Inc 7520139$2,985.50DlaSPE7MC22P3965
Apr 11, 2022Bahr Machine Company Inc 7520142$2,839.60DlaSPE7M022V3329
Feb 2, 2022Bahr Machine Company Inc 7520113$2,581.45DlaSPE7M122F078L
Jan 31, 2022Bahr Machine Company Inc 7520112$2,581.45DlaSPE7M122F070Y
Jan 31, 2022Bahr Machine Company Inc 752013$2,581.45DlaSPE7M122F070V
Jan 31, 2022Bahr Machine Company Inc 7520131$2,581.45DlaSPE7M122F068U
Jan 31, 2022Bahr Machine Company Inc 752018$2,581.45DlaSPE7M122F069H
Jan 31, 2022Bahr Machine Company Inc 752014$2,581.45DlaSPE7M122F069D
Oct 29, 2019Bahr Machine Company Inc 7520132$2,284.55DlaSPE7MC20P0056
Oct 11, 2019Bahr Machine Company Inc 7520114$2,485.50DlaSPE7MC20P0241
Nov 28, 2017Bahr Machine Company Inc 7520125$2,174.55DlaSPE7MC18V1634

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 19 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 420945.

Request 420945

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
$4,337.51
Unit of issue
EA
Acquisition advice
Z — Insurance item
Source of supply
SMS
Effective
Oct 1, 2025

Item characteristics

Flow Control Device
DISK
Maximum Operating Temp
SINGLE RESPONSE FAHRENHEIT 300.0
Valve Operation Method
AUTOMATIC
Flange Shape
SECOND END ROUND
Connection Type
ALL ENDS FLANGE
Mounting Position
HORIZONTAL OR VERTICAL
Valve Size
INCHES 4.000
Operating Pressure
SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 167.0
Nominal Outside Diameter
ALL ENDS INCHES 4.636
Face To Face Distance
INCHES 3.885
Nominal Thickness
SECOND END INCHES 0.233
Nominal Thickness
FIRST END INCHES 0.233
Flange Face Design
ALL ENDS PLAIN
Media For Which Designed
SINGLE RESPONSE AIR
Proprietary Characteristics
PACS
Supplementary Features
APPLICABLE TO KC-135R ACFT
Fsc Application Data
AUXILIARY POWER UNIT(APU) CAGEC 79318

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.

Get the daily Market Pulse

New DLA RFQs, SAM.gov notices, yesterday's awards and FAA directives, weekday mornings. Free, one click to leave.