- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.492 inches min
- Fastener Length
- 1.137 inches nominal
- Head Style
- Double hexagon W/hole
- Head Height
- 0.300 inches nominal
- Width Between Flats
- 0.304-0.313 inches
- Extended Washer Diameter
- 0.428-0.438 inches
- Extended Washer Thickness
- 0.069 inches nominal
- Grip Diameter
- 0.2485-0.2495 inches
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.625 inches nominal
- Thread Qty/Inch
- 28
- Min Tensile Strength
- 180,000 psi
- Hardness
- 39.0-43.0 Rockwell C
- Material
- Steel (E4340/8740/6150/4140)
- Material Spec
- MIL-S-5000/MIL-S-6049/MIL-S-8503/MIL-S-5626
- Surface Treatment
- Cadmium and chromate (QQ-P-416 ty 2 cl 3)
- Thread Series
- 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.