Aerospace Hardware Store

Aerospace

Hardware

AF720A Safety Relief Valve

4820-01-439-5021

Specifications, compliance details, and sourcing options for this NSN. Request a quote to confirm availability, pricing, and lead time.

Request for Quote

Send us a request for quote using the form below. Our team will promptly provide you with the latest pricing and availability details.

AS9120 ISO9001 Aviation Suppliers Association Global Shipping

Featured Parts

VP1123-4-17
5305-00-182-7078
Close Tolerance Screw
VP1131-4-12
5305-00-512-6435
Close Tolerance Screw
VP1131-4-18
5305-00-512-6175
Close Tolerance Screw
VP1131-4-86
5305-00-512-6252
Close Tolerance Screw
VP1135R PORT
4810-01-375-7209
Solenoid Valve
VP1135R (PORT)
4810-01-375-7209
Solenoid Valve
VP1135S STRBD
4810-01-375-6299
Solenoid Valve
VP1135S (STRBD)
4810-01-375-6299
Solenoid Valve

Need Assistance?

Our catalog is extensive, but we understand that sometimes specific needs might not be immediately available. If you could not find the exact products you were searching for, we are here to help!

Contact us directly, and our team will assist you in finding the perfect solution for your requirements.

Contact Us

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

  • Genuine Manufacturers Parts
  • 100% Product Inspection
  • 7 Year Sales Record Retention
  • Fast On-Time Delivery
  • HAZMAT Certified
  • Global Shipping

Official Item Classification

Name
Safety Relief Valve
Part Number
AF720A
(NSN) National Stock Number
4820-01-439-5021
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
05488
(FIIG) Federal Item Identification Guide
A046B0
Date
12/10/1996 (29 years ago)

must not exceed 200 cc leakage at 55/60 psig; ball seated at 600 psi during assy; 2.310 in. min 2.410 in. max lg special features, automatic valve operation method

Specs & Compatibility

Valve Operation Method

automatic

Special Features

must not exceed 200 cc leakage at 55/60 psig; ball seated at 600 psi during assy; 2.310 in. min 2.410 in. max lg

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0005488

Related Hardware Products

Part Number Description
AF720A Safety Relief Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-01-439-5021?
The FSCG of the NSN 4820-01-439-5021 is 4820
Does the NSN 4820-01-439-5021 have a Schedule B code assigned?
Yes, the Schedule B code is 8481400000
Does NSN 4820-01-439-5021 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 4820-01-439-5021 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-01-439-5021 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 4820-01-439-5021 was assigned to the Federal Catalog?
It was assigned 29 years ago, on Tue, Dec 10, 1996