The Key,socket Head Screw, cataloged under National Stock Number 5120-00-781-8977, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 18 commercial cross-references from 14 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5120-00-781-8977 |
| Primary Part Number | B18.3 |
| Item Name | Key,socket Head Screw |
| FSC / FSG | 5120 / 51 — No Item Name Available |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | CANCELLED |
| Wrenching Surface Flute Quantity | 4 |
| Style Designator | L-HANDLE |
| Wrenching Surface Shape | SPLINE BOTH ENDS EXTERNAL |
| Wrenching Surface Size | 0.076 INCHES NOMINAL BOTH ENDS IN |
| Specification/standard Data | 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Long Arm Length | 1.656 INCHES MINIMUM AND 1.844 INCHES MAXIMUM IN |
| Features Provided | SHORT SERIES |
| Material | STEEL OVERALL |
| Short Arm Length | 0.469 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| B18.3 | The American Society of Mechanical Engineers (USA) |
| S0764 | Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc (USA) |
| A-A-2925 TY2 | General Services Administration Federal Supply Service (USA) |
| S-076-4 | Mahalo Industries Inc Dba Bristol Wrench Co. (USA) |
| A18223-3 | Honeywell International Inc Dba Honeywell (USA) |
| MS6A | Sna Germany Gmbh (DEU) |
| A-A-2925 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| 7871267P1 | Lockheed Martin Corporation Div Rms (USA) |
| GGG-K-275 TY2CL1 | General Services Administration Federal Supply Service (USA) |
| 119032 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| MS6 | Sna Germany Gmbh (DEU) |
| 024-9730-00 | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 024-9730-000 | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 135A1013B | Cosmos Industries Inc (USA) |
| S-076-4 | See-Lect Industrial Equipment Co. Inc. Dba See Lect Industrl Equip (USA) |
| 994900-5 | Raytheon Company Dba Raytheon (USA) |
| GGG-K-275 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| A-A-2473 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
NSN 5120-00-781-8977 is a Key,socket Head Screw, manufactured by The American Society of Mechanical Engineers, classified under FSC 5120 (No Item Name Available). Status: cancelled.
NSN 5120-00-781-8977 has 18 cross-referenced part numbers: B18.3 (The American Society of Mechanical Engineers), S0764 (Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc), A-A-2925 TY2 (General Services Administration Federal Supply Service), S-076-4 (Mahalo Industries Inc Dba Bristol Wrench Co.), A18223-3 (Honeywell International Inc Dba Honeywell) and 13 more.
There are 12 known substitutes for 5120-00-781-8977: 6150-00-214-2682, 5120-00-224-2482, 5120-00-224-2496 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for B18.3: Overall Length: 1.731 INCHES MINIMUM AND 1.920 INCHES MAXIMUM IN; Wrenching Surface Flute Quantity: 4; Style Designator: L-HANDLE; Wrenching Surface Shape: SPLINE BOTH ENDS EXTERNAL. 10 total characteristics are documented in the Federal Logistics Information System.
NSN 5120-00-781-8977 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.