- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.488 inches minimum and 0.508 inches maximum
- Fastener Length
- 1.248 inches minimum and 1.288 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.203 inches minimum and 0.235 inches maximum
- Width Between Flats
- 0.553 inches minimum and 0.565 inches maximum
- Shoulder Diameter
- 0.371 inches minimum first shoulder and 0.374 inches maximum first shoulder
- Shoulder Length
- 0.760 inches minimum first shoulder and 0.780 inches maximum first shoulder
- Nominal Thread Diameter
- 0.312 inches
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp 8735 overall or steel comp 6150 overall
- Material Document and Classification
- MIL-S-6098 mil spec 1ST material response overall or MIL-S-8503 mil spec 2ND material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 3 fed spec all treatment responses overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS1297 professional/industrial association standard and NASMS20074-5 professional/industrial association specification
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.