- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.506 inches minimum and 0.556 inches maximum
- Fastener Length
- 1.203 inches minimum and 1.233 inches maximum
- Head Style
- Double hexagon W/hole
- Head Height
- 0.254 inches nominal
- Width Between Flats
- 0.304 inches minimum and 0.313 inches maximum
- Extended Washer Diameter
- 0.465 inches minimum and 0.475 inches maximum
- Extended Washer Thickness
- 0.042 inches nominal
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.677 inches minimum and 0.697 inches maximum
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 260000 pounds per square inch
- Hardness Rating
- 51.0 rockwell C minimum overall and 54.0 rockwell C maximum overall
- Material
- Steel comp H11 overall
- Material Document and Classification
- Ams 6485 assn std single material response overall or AMS6487 assn std single material response overall
- Surface Treatment
- Nickel overall and cadmium overall
- Surface Treatment Document and Classification
- MIL-C-8837, ty 2, cl 3 mil spec 1ST treatment response overall or ams 2416 assn std 2ND treatment response overall or ams 2416 assn std 3RD treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 56878-EWB26 manufacturers standard
Catalogue data is compiled from public DLA/FLIS sources and is provided for
identification. Availability, condition and certification are confirmed on
quotation. OmniSynk Distribution Services is a stocking distributor.