- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.395 inches minimum
- Fastener Length
- 1.197 inches minimum and 1.217 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.387 inches minimum and 0.412 inches maximum
- Head Height
- 0.059 inches minimum and 0.069 inches maximum
- Shoulder Diameter
- 0.279 inches minimum first shoulder and 0.280 inches maximum first shoulder
- Shoulder Length
- 0.802 inches minimum first shoulder and 0.822 inches maximum first shoulder
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Hardness Rating
- 35.0 rockwell C nominal overall
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp 4130 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 8740 overall
- Material Document and Classification
- MIL-S-6758 mil spec 1ST material response overall or MIL-S-6050 mil spec 2ND material response overall or MIL-S-6098 mil spec 3RD material response overall or MIL-S-6049 mil spec 4TH material response overall
- Surface Treatment
- Cadmium overall
- Thread Series Designator
- UNJF
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.