The Wrench,open End, cataloged under National Stock Number 5120-00-277-1237, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Armstrong Bros Tool Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5120-00-277-1237 |
| Primary Part Number | 31-078 |
| Item Name | Wrench,open End |
| FSC / FSG | 5120 / 51 — No Item Name Available |
| Manufacturer | Armstrong Bros Tool Co |
| Status | CANCELLED |
| Wrenching Surface Shape | OVAL SINGLE END INTERNAL |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Head Thickness | 1.250 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 5 TYPE |
| Material | STEEL OVERALL |
| Style Designator | SINGLE HEAD |
| Head Angle | 15.0 DEGREES NOMINAL |
| Wrenching Surface Size | 2.438 INCHES NOMINAL SINGLE END IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 31-078 | Armstrong Bros Tool Co (USA) |
| 41W1420 | Marine Corps (USA) |
| 31-078 | Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA) |
| GGG-W-636 TY5 | General Services Administration Federal Supply Service (USA) |
| 31-078 | Apex Tool Group, Llc Dba Nicholson (USA) |
| GGG-W-636 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
NSN 5120-00-277-1237 is a Wrench,open End, manufactured by Armstrong Bros Tool Co, classified under FSC 5120 (No Item Name Available). Status: cancelled.
NSN 5120-00-277-1237 has 6 cross-referenced part numbers: 31-078 (Armstrong Bros Tool Co), 41W1420 (Marine Corps), 31-078 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), GGG-W-636 TY5 (General Services Administration Federal Supply Service), 31-078 (Apex Tool Group, Llc Dba Nicholson) and 1 more.
There are 8 known substitutes for 5120-00-277-1237: 5325-00-353-2431, 5120-00-596-1585, 6610-00-703-9553 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 31-078: Overall Length: 21.750 INCHES NOMINAL IN; Wrenching Surface Shape: OVAL SINGLE END INTERNAL; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Head Thickness: 1.250 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.
NSN 5120-00-277-1237 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.