Home · FSC 4820 Valves, Nonpowered · NSN 4820-01-257-9790

NSN 4820-01-257-9790 — Valve,Safety Relief

NIIN 01-257-9790 · unit of issue EA · AAC J (not stocked, central procurement) · source of supply SMS

NSN 4820-01-257-9790 is the national stock number for a valve,safety relief in federal supply class 4820 (Valves, Nonpowered). It cross-references to 1 manufacturer part number from 2 CAGE codes, including Hunt Valve Company Inc Dba Union Flonetics, Hunt Valve Company, Inc.; the primary is R10AN3N310-BM3 AND D50551. The unit of issue is EA and the FLIS list price is $129,283.92.

The U.S. government has bought this item 2 times on record, most recently on October 15, 2018 at $97,060.00 each from Hunt Valve Company Inc Dba Union Flonetics. 1 solicitation is open right now, the soonest due October 2, 2026 for 1 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 2 CAGEs

open solicitation, all agencies

government buys in 24 months

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
R10AN3N310-BM3 AND D50551	34889	Hunt Valve Company Inc Dba Union Flonetics	3 · Design control (vendor)	9 · Reference only
R10AN3N310-BM3 AND D50551	11859	Hunt Valve Company, Inc.	3 · Design control (vendor)	2 · Fully interchangeable

Government demand

Open DLA RFQs (DIBBS)

SPE7MC26T287Z · 1 EA · due Oct 2, 2026 · N · AMSC D · DIBBS

What the government paid

Date	Vendor	Qty	Unit cost	Amount	Buyer	Reference
Oct 15, 2018	Hunt Valve Company Inc Dba Union Flonetics 34889	1	$97,060.00		Dla	SPE7M019P0197
Aug 28, 2012	Hunt Valve Company Inc Dba Union Flonetics 34889	1	$54,656.00		Dla	SPM7M012M6798

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 2 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 R10AN3N310-BM3 AND D50551.

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

DLA management data

FLIS unit price: $129,283.92
Unit of issue: EA
Acquisition advice: J — Not stocked, central procurement
Source of supply: SMS
Effective: Dec 1, 2025

Item characteristics

Flow Control Device: DISK
Bonnet Type: INSIDE SCREW
Bonnet Attachment Method: BOLTED
Disk Loading Method: SPRING
Bolt Hole Quantity: 8
Maximum Operating Temp: SINGLE RESPONSE FAHRENHEIT 250.0
Valve Operation Method: AUTOMATIC
Flange Shape: ALL ENDS ROUND WITH HOLES
Connection Type: ALL ENDS FLANGE
Valve Size: INCHES 4.000
Adjustable Pressure Range: POUNDS PER SQUARE INCH 40.0 TO 48.0
Operating Pressure: SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 250.0
Nominal Outside Diameter: ALL ENDS INCHES 10.000
Nominal Thickness: ALL ENDS INCHES 1.250
First Connection Face To Centerline Distance: INCHES 14.500
Bolt Hole Nominal Diameter: ALL ENDS INCHES 0.875
Second Connection Face To Centerline Distance: INCHES 14.500
Bolt Circle Nominal Diameter: ALL ENDS INCHES 7.875
Flange Face Design: ALL ENDS PLAIN
Material: SEAT NICKEL ALLOY
Media For Which Designed: SINGLE RESPONSE WATER-OIL-GAS
Furnished Items And Quantity: LEVER 1

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.