NSN 4820-01-668-7560 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-668-7560. Manufacturer of record part number: 138-9057.
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense
Identification
NSN: 4820-01-668-7560
NIIN: 016687560
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 138-9057
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-668-7560, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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. Current acquisition status: Active.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-668-7560?
NSN 4820-01-668-7560 is a Valve,safety Relief, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-668-7560?
NSN 4820-01-668-7560 has 2 manufacturer part numbers on file: 1389057 (Hastings Deering (aust) Pty Ltd), 138-9057 (Caterpillar Inc Div Caterpillar Defense).
What are the specifications of 138-9057?
Key specifications for 138-9057: Nominal Length: 96.5 MILLIMETERS ALL ENDS MM; Nominal Width: 71.1 MILLIMETERS ALL ENDS MM; Part Name Assigned by Controlling Agency: AIR COMPRESSOR PRESSURE RELIEF VALVE; End Item Identification: 385-0933 AIR COMPRESSOR GROUP. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-668-7560 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.