NSN 4820-00-816-1286 C0494, C049-4, P10673

Product Details | SAFETY RELIEF VALVE

4820-00-816-1286 A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes VALVE (1), RELIEF, PRESSURE AND TEMPERATURE.

Part Alternates: C0494, C049-4, P10673, P10-673, 4820-00-816-1286, 00-816-1286, 4820008161286, 008161286

Valves | Valves, Nonpowered

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
48	01 JAN 1962	00-816-1286	05488 ( VALVE, SAFETY RELIEF )

Drawings & Photos | NSN 4820-00-816-1286

Part Number	Request Date	QTY	Origin
C049-4	2025-04-118	95	DIBBS
P10-673	2025-04-118	95	DIBBS
C049-4	2025-03-83	35	DIBBS
P10-673	2025-03-83	35	DIBBS
C049-4	2025-03-72	35	DIBBS
P10-673	2025-03-72	35	DIBBS
P10673	2025-02-38	2	United States
C049-4	2024-06-162	96	DIBBS
P10-673	2024-06-162	96	DIBBS
C049-4	2024-05-151	96	DIBBS
P10-673	2024-05-151	96	DIBBS
C049-4	2024-05-130	37	DIBBS
P10-673	2024-05-130	37	DIBBS
C049-4	2023-07-198	59	DIBBS
P10-673	2023-07-198	59	DIBBS
4820-00-816-1286	2023-07-187	59	US
C049-4	2023-07-187	59	DIBBS
P10-673	2023-07-187	59	DIBBS
C049-4	2023-06-176	59	DIBBS
P10-673	2023-06-176	59	DIBBS
C049-4	2023-05-146	35	DIBBS
P10-673	2023-05-146	35	DIBBS
C049-4	2023-05-135	35	DIBBS
P10-673	2023-05-135	35	DIBBS
C049-4	2023-05-124	35	DIBBS
P10-673	2023-05-124	35	DIBBS
C049-4	2022-12-363	24	DIBBS
P10-673	2022-12-363	24	DIBBS
C049-4	2022-03-62	2	DIBBS
P10-673	2022-03-62	2	DIBBS
C049-4	2022-01-30	1	DIBBS
P10-673	2022-01-30	1	DIBBS
C049-4	2021-10-278	8	DIBBS
P10-673	2021-10-278	8	DIBBS
C049-4	2021-09-259	1	DIBBS
P10-673	2021-09-259	1	DIBBS
C049-4	2021-09-256	5	DIBBS
P10-673	2021-09-256	5	DIBBS
C049-4	2021-09-245	5	DIBBS
P10-673	2021-09-245	5	DIBBS
C049-4	2021-08-228	4	DIBBS
P10-673	2021-08-228	4	DIBBS
C049-4	2021-08-216	4	DIBBS
P10-673	2021-08-216	4	DIBBS
C049-4	2020-10-282	26	DIBBS
P10-673	2020-10-282	26	DIBBS
C049-4	2020-08-226	12	DIBBS
P10-673	2020-08-226	12	DIBBS
C049-4	2020-05-135	19	DIBBS
P10-673	2020-05-135	19	DIBBS
C049-4	2019-05-143	40	DIBBS
P10-673	2019-05-143	40	DIBBS
C049-4	2019-01-03	25	DIBBS
P10-673	2019-01-03	25	DIBBS
4820-00-816-1286	2017-07-183	27	DIBBS
4820-00-816-1286	2017-06-155	27	DIBBS
4820-00-816-1286	2016-05-143	37	DIBBS
4820-00-816-1286	2015-08-214	32	DIBBS
4820-00-816-1286	2014-02-54	14	DIBBS
4820-00-816-1286	2013-02-58	14	DIBBS
4820-00-816-1286	2012-10-284	15	DIBBS
4820-00-816-1286	2012-06-178	12	DIBBS
4820-00-816-1286	2011-10-284	6	DIBBS
4820-00-816-1286	2011-09-244	7	DIBBS
4820-00-816-1286	2011-06-152	3	DIBBS
4820-00-816-1286	2011-05-143	9	DIBBS
4820-00-816-1286	2011-04-103	11	DIBBS
4820-00-816-1286	2011-04-103	1	DIBBS
4820-00-816-1286	2011-04-103	9	DIBBS

Cross Reference | NSN 4820-00-816-1286

Part Number	Cage Code	Manufacturer
C049-4	81755	LOCKHEED MARTIN CORPORATION DBA LOCKHEED MARTIN AERONAUTICS
P10-673	91816	CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Related Products | NSN 4820-00-816-1286

4820-00-816-1476, 4820-00-816-1877, 4820-00-816-2398, 4820-00-816-2444, 4820-00-816-2720

Technical Data | NSN 4820-00-816-1286

Characteristic	Specifications
MATERIAL	ALUMINUM ALLOY 2024 BODY LINING ALUMINUM ALLOY 2024 OR RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE ALUMINUM ALLOY 2024 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY LINING QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE SEAT
SURFACE TREATMENT	ANODIZE
STYLE DESIGNATOR	C4 STRAIGHT THRU
FLOW CONTROL DEVICE	POPPET
MEDIA FOR WHICH DESIGNED	AIR 1ST RESPONSE WATER, FRESH 2ND RESPONSE
MAXIMUM OPERATING PRESSURE	140.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP	300.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD	AUTOMATIC
CONNECTION TYPE	THREADED EXTERNAL TUBE ALL ENDS
CONNECTION STYLE	G42 FLARED ALL ENDS
SEAT ANGLE	370.0 DEGREES ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED	0.250 INCHES 1ST END
THREAD SERIES DESIGNATOR	UNF ALL ENDS
NOMINAL THREAD SIZE	0.438 INCHES ALL ENDS
THREAD CLASS	3A ALL ENDS
THREAD DIRECTION	RIGHT-HAND ALL ENDS
DISK LOADING METHOD	SPRING
OPENING PRESSURE SETTING	5.0 POUNDS PER SQUARE INCH
MANUFACTURERS CODE	91816
DESIGN CONTROL REFERENCE	P10-673

Restrictions/Controls & Freight Information | NSN 4820-00-816-1286

Restrictions
Freight

Category	Code	Description
Shelf-Life Code:	0	Nondeteriorative
Hazardous Material Indicator Code	N	There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:	A	Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:	U	UNCLASSIFIED
Precious Metals Indicator Code:	U	Precious metal type is unknown
Criticality Code:	X	The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Category	Code	Description
NMF Description	127220	PRESSURE REG/RED/RELIEF VALVES NOI
Less than car load rating
Less than truck load rating	P	77.5
Water commodity Code	594	unknown
Originating Activity Code	XX
Air Dimension Code	A	Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity	B	Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
Air Special Handling	Z	No special handling required.
Special Handling Code	9	unknonwn
HAZMAT
Type of Cargo	Z	No special type of cargo code applicable

Management | NSN 4820-00-816-1286

Air Force

Category	Code	Description
Budget Code	9	General Support DIV57X4921.070:Air Force decentrally managed expense items (ERRC XB3, XF-3) with a unit cost of less than $250,000 that are requisitioned/procured at base (retail) level from DLA, GSA, Army, Navy, Depot Maintenance Service, Air Force Industrial Fund (AFMC), local manufacture and commercial vendors.
Price Validation	N	The current standard price in Catalog Management Data (CMD) has not analyzed or coded for LP/LM. The price has not been analyzed or reviewed for accuracy. ZOP or Standard price challenges are permissible, but must be supported with adequate justification. However, if coded for Local Purchase (LP) or Fabrication/Manufacture as indicated with an (LM) Acquisition Advice Code of ?L? or?F?,the case must be evaluated locally where purchased or fabricated.
Fund Code	SF	Stock fund applicable to items managed for the Air Force by the respective Inventory Control Point.
Materiel Management Aggregation Code	SX	SX:AF SICA RESIDUAL MMAC-OC-ALC
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DF	Department of the Air Force
Service Organization	F	U.S. Air Force
Reparability	N	Stock Fund (except Munitions)
Acquisition Advice Codes	Z	INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each