- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.423 inches minimum and 0.483 inches maximum
- Fastener Length
- 1.203 inches minimum and 1.243 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.172 inches minimum and 0.204 inches maximum
- Width Between Flats
- 0.490 inches minimum and 0.502 inches maximum
- Shoulder Diameter
- 0.309 inches minimum first shoulder and 0.312 inches maximum first shoulder
- Shoulder Length
- 0.760 inches minimum first shoulder and 0.780 inches maximum first shoulder
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp 4037 overall or steel comp 4130 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 8740 overall or steel comp 4140 overall
- Material Document and Classification
- MIL-B-6812 mil spec all material responses overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 3 fed spec single treatment response overall
- Thread Series Designator
- UNF
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.