NSN 4820-00-446-1676 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-446-1676. Manufacturer of record part number: 271-35.
Supply Items and Quantities: STEM AND SEAT ASSEMBLY,CRES 1,0 RING,SYNTHETIC RUBBER 3. WASHER,PLASTIC 1,PAPER DISKS 3,RED,YELLOW AND BLUE
2 manufacturer part numbers on file
Manufacturer of record: Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
Identification
NSN: 4820-00-446-1676
NIIN: 004461676
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 271-35
Manufacturer: Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
General Description
The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-00-446-1676, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-446-1676
Primary Part Number
271-35
Item Name
Parts Kit,safety Relief Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
Status
ACTIVE
Component Quantity
8
Supply Items and Quantities
STEM AND SEAT ASSEMBLY,CRES 1,0 RING,SYNTHETIC RUBBER 3. WASHER,PLASTIC 1,PAPER DISKS 3,RED,YELLOW AND BLUE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3110-00-991-0906POSSIBLE MATCH
BEARING,BALL,ANNULAR
Possible match (shared part number)
6515-01-161-7010271.35POSSIBLE MATCH
NAIL,FEMORAL
Possible match (shared part number)Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
5930-01-310-072027135POSSIBLE MATCH
SWITCH,FLOW
Possible match (shared part number)Setra Systems, Inc. Dba Gems Sensors
5915-01-414-244327135POSSIBLE MATCH
FILTER,BAND PASS
Possible match (shared part number)Viavi Solutionsllc
6515-01-460-827727-135POSSIBLE MATCH
CATHETER,DRAINAGE
Possible match (shared part number)Boston Scientific Corp Medi-Tech Div
5331-01-503-748727135POSSIBLE MATCH
O-RING
Possible match (shared part number)Climax Portable Machine Tools, Inc
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA)
Related Parts
3110-00-991-0906POSSIBLE MATCH
BEARING,BALL,ANNULAR
6515-01-161-7010POSSIBLE MATCH
NAIL,FEMORAL
271.35
5930-01-310-0720POSSIBLE MATCH
SWITCH,FLOW
27135
5915-01-414-2443POSSIBLE MATCH
FILTER,BAND PASS
27135
6515-01-460-8277POSSIBLE MATCH
CATHETER,DRAINAGE
27-135
5331-01-503-7487POSSIBLE MATCH
O-RING
27135
5310-01-616-9523POSSIBLE MATCH
WASHER,FLAT
5717132
6150-01-717-5137POSSIBLE MATCH
CABLE ASSEMBLY,SPECIAL PURPOSE,E
27135
Frequently Asked Questions
What is NSN 4820-00-446-1676?
NSN 4820-00-446-1676 is a Parts Kit,safety Relief Valve, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-446-1676?
NSN 4820-00-446-1676 has 2 manufacturer part numbers on file: C6488PC6T08 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 271-35 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
What NSN replaces 4820-00-446-1676?
8 possible matches (shared part number, not a government interchangeability claim): 3110-00-991-0906, 6515-01-161-7010, 5930-01-310-0720. Verify interchangeability with system specifications before substitution.
What are the specifications of 271-35?
Key specifications for 271-35: Component Quantity: 8; Supply Items and Quantities: STEM AND SEAT ASSEMBLY,CRES 1,0 RING,SYNTHETIC RUBBER 3. WASHER,PLASTIC 1,PAPER DISKS 3,RED,YELLOW AND BLUE. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-446-1676 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.