The Key,socket Head Screw, cataloged under National Stock Number 5120-00-189-2979, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Ngk Metals Corporation Dba N G K Berylco. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-00-189-2979 |
| Primary Part Number | L-17 |
| Item Name | Key,socket Head Screw |
| FSC / FSG | 5120 / 51 — No Item Name Available |
| Manufacturer | Ngk Metals Corporation Dba N G K Berylco |
| Status | ACTIVE |
| Long Arm Length | 7.250 INCHES NOMINAL IN |
| Style Designator | L-HANDLE |
| Wrenching Surface Shape | HEXAGON BOTH ENDS EXTERNAL |
| Short Arm Length | 2.250 INCHES NOMINAL IN |
| Wrenching Surface Size | 0.875 INCHES NOMINAL BOTH ENDS IN |
| Material | COPPER ALLOY OVERALL |
| Features Provided | NONMAGNETIC AND NONSPARKING |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| L-17 PRIMARY | Ngk Metals Corporation Dba N G K Berylco (USA) |
| W-1050-T | Ampco Metal Inc. Dba Ampco Metal Inc (USA) |
| L-17-2592 | Ngk Metals Corporation Dba N G K Berylco (USA) |
| W-1050-T PRIMARY | Ampco Partners, Ltd. Dba Ampco Safety Tools (USA) |
| MIL-K-21120 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| A-A-2477 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
NSN 5120-00-189-2979 is a Key,socket Head Screw, manufactured by Ngk Metals Corporation Dba N G K Berylco, classified under FSC 5120 (No Item Name Available). Status: active.
NSN 5120-00-189-2979 has 6 cross-referenced part numbers: L-17 (Ngk Metals Corporation Dba N G K Berylco), W-1050-T (Ampco Metal Inc. Dba Ampco Metal Inc), L-17-2592 (Ngk Metals Corporation Dba N G K Berylco), W-1050-T (Ampco Partners, Ltd. Dba Ampco Safety Tools), MIL-K-21120 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.
There are 12 known substitutes for 5120-00-189-2979: 5975-00-054-6319, 3110-00-156-6712, 5120-00-189-2980 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for L-17: Long Arm Length: 7.250 INCHES NOMINAL IN; Style Designator: L-HANDLE; Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL; Short Arm Length: 2.250 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.