NSN 5120-01-430-9987 · NIIN 014309987 · Part number A128
Stanley Industrial & Automotive Llc · FSC 5120 — Hand Tools, Nonedged, Nonpowered · FSG 51 — Hand Tools · CAGE 76377
Government record, cited
NSN 5120-01-430-9987 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-430-9987. Manufacturer of record part number: A128.
Also searched as5120-01-430-9987 ·
5120014309987 ·
NIIN 014309987 ·
01-430-9987 ·
FSC 5120 Hand Tools, Nonedged, Nonpowered · CAGE 76377 · A128
Drive Surface Size: 0.250 INCHES NOMINAL SECOND END IN
Drive Surface Size: 0.375 INCHES NOMINAL FIRST END IN
Style Designator: EXTERNAL-INTERNAL
Outside Diameter: 0.687 INCHES MAXIMUM IN
Features Provided: MANUAL TOOL
Drive End Shape: SQUARE FIRST END INTERNAL
Drive End Shape: SQUARE SECOND END EXTERNAL
Identification
NSN: 5120-01-430-9987
NIIN: 014309987
FSC: 5120 — Hand Tools, Nonedged, Nonpowered
FSG: 51 — Hand Tools
Primary part number: A128
Manufacturer: Stanley Industrial & Automotive Llc
General Description
The Adapter,socket Wrench, cataloged under National Stock Number 5120-01-430-9987, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Stanley Industrial & Automotive Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 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
5120-01-430-9987
Primary Part Number
A128
Item Name
Adapter,socket Wrench
FSC / FSG
5120 / 51 — Hand Tools, Nonedged, Nonpowered
Manufacturer
Stanley Industrial & Automotive Llc
Status
ACTIVE
Drive Surface Size
0.250 INCHES NOMINAL SECOND END IN
Drive Surface Size
0.375 INCHES NOMINAL FIRST END IN
Style Designator
EXTERNAL-INTERNAL
Outside Diameter
0.687 INCHES MAXIMUM IN
Features Provided
MANUAL TOOL
Drive End Shape
SQUARE FIRST END INTERNAL
Drive End Shape
SQUARE SECOND END EXTERNAL
Surface Treatment
CHROMIUM OVERALL
Material
STEEL OVERALL
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4140-01-486-3873A128POSSIBLE MATCH
BLOWER,EXHAUST
Possible match (shared part number)Fasco Industries Inc
NSN 5120-01-430-9987 is a Adapter,socket Wrench, manufactured by Stanley Industrial & Automotive Llc, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
What part numbers are listed for NSN 5120-01-430-9987?
NSN 5120-01-430-9987 has 1 manufacturer part number on file: A128 (Stanley Industrial & Automotive Llc).
What NSN replaces 5120-01-430-9987?
6 possible matches (shared part number, not a government interchangeability claim): 4140-01-486-3873, 8455-01-528-8592, 8455-01-541-3154. Verify interchangeability with system specifications before substitution.
What are the specifications of A128?
Key specifications for A128: Drive Surface Size: 0.250 INCHES NOMINAL SECOND END IN; Drive Surface Size: 0.375 INCHES NOMINAL FIRST END IN; Style Designator: EXTERNAL-INTERNAL; Overall Length: 1.000 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Is NSN 5120-01-430-9987 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.