Proto Challenger 9/16″ and 5/8″ Open End Tappet Wrench. Part number 5920. US Army 5120-00-184-8621. This is a very thin wrench used in valve adjustments, but would also be great on jam nuts and plumbing valves. Ex-military. Engraving is present, see photos. A few light scratches from sliding around in toolbox drawer. Lots of life left in this wrench. Made in the USA. 14261a WRD4
SPECS:
| MRC | Parameter | Characteristics |
|---|---|---|
| ABHP | Overall Length | 6.500 inches minimum |
| AJAU | Large End Head Thickness | 0.234 inches maximum |
| AJAV | Small End Head Thickness | 0.218 inches maximum |
| AJBR | Wrenching Surface Size | 0.562 inches nominal first end |
| AJBR | Wrenching Surface Size | 0.625 inches nominal second end |
| CQFM | Hardness Rating | 45.0 rockwell C minimum and 58.0 rockwell C maximum |
| CRWY | Wrenching Surface Shape | Oval both ends internal |
| CTHK | Small End Head Angle | 15.0 degrees nominal |
| CWGT | Large End Head Angle | 15.0 degrees nominal |
| FEAT | Special Features | Forged steel |
| MATT | Material | Steel overall |
| SFTT | Surface Treatment | Chromium overall |
| STYL | Style Designator | Double head |
| ZZZK | Specification/Standard Data | 05047-ASME B107.100 professional/industrial association standard |
| ZZZT | Nondefinitive Spec/STD Data | 3 type |
| Weight | 0.6 lbs |
|---|---|
| Dimensions | 7 × 1 × 1 in |
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