Home · FSC 4820 Valves, Nonpowered · NSN 4820-00-956-1477

NSN 4820-00-956-1477 — Seat,Valve

NIIN 00-956-1477 · unit of issue EA · AAC Z (insurance item) · source of supply SMS

NSN 4820-00-956-1477 is the national stock number for a seat,valve in federal supply class 4820 (Valves, Nonpowered). It cross-references to 3 manufacturer part numbers from 2 CAGE codes, including Steward Machine Co Inc, Hardie-Tynes Co., Inc.; the primary is 591-607. The unit of issue is EA and the FLIS list price is $2,929.87.

The U.S. government has bought this item 1 time on record, 1 of them in the last 24 months, most recently on October 6, 2026 for $20,925 from Steward Machine Co Inc. No seller has confirmed stock of it here in the last 30 days; watching the number is free and the first listing triggers an alert.

part numbers from 2 CAGEs

open solicitations, all agencies

government buy 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
60-591PC607	9E328	Steward Machine Co Inc	3 · Design control (vendor)	2 · Fully interchangeable
591-607	27235	Hardie-Tynes Co., Inc.	5 · Secondary reference	9 · Reference only
591-607	9E328	Steward Machine Co Inc	5 · Secondary reference	2 · Fully interchangeable
60-591PC607	27235	Hardie-Tynes Co., Inc.	5 · Secondary reference	9 · Reference only
60-773PC607	27235	Hardie-Tynes Co., Inc.	5 · Secondary reference	9 · Reference only
60-773PC607	9E328	Steward Machine Co Inc	5 · Secondary reference	2 · Fully interchangeable

Government demand

Nothing open right now. Last government buy Oct 6, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

Date	Vendor	Qty	Unit cost	Amount	Buyer	Reference
Oct 6, 2026	Steward Machine Co Inc 9E328			$20,925	Dla	SPE7M227V0116 » Award/Basic Package View

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 1 buy 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 591-607.

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

DLA management data

FLIS unit price: $2,929.87
Unit of issue: EA
Acquisition advice: Z — Insurance item
Source of supply: SMS
Effective: Oct 1, 2026

Item characteristics

Flange Diameter: INCHES MINIMUM 2.805 AND INCHES MAXIMUM 2.810
Body Outside Diameter: INCHES MINIMUM 2.315 AND INCHES MAXIMUM 2.320
Body Inside Diameter: INCHES MINIMUM 1.374 AND INCHES MAXIMUM 1.375
Flange Seat To Disk End Height: INCHES MINIMUM 0.752 AND INCHES MAXIMUM 0.755
Under Flange Height: INCHES MINIMUM 0.183 AND INCHES MAXIMUM 0.186
Seating Surface Shape: FLAT
Material: FACE COBALT ALLOY
Material: BODY STEEL
Material Document And Classification: BODY FED SPEC SINGLE MATERIAL RESPONSE QQ-S-763,CLASS 410
Material Document And Classification: FACE MIL SPEC SINGLE MATERIAL RESPONSE -IL-R-17131,TYE -IL-RCOCR-A

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.