- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.313 inches minimum
- Fastener Length
- 0.375 inches nominal
- Head Style
- Flat chamfer
- Head Diameter
- 0.262 inches minimum and 0.270 inches maximum
- Head Height
- 0.159 inches minimum and 0.164 inches maximum
- Locking Feature
- Patch threads or pellet threads or strip threads
- Internal Drive Style
- Hexagon
- End Item Identification
- MK-48 torpedo;helicopter, search and rescue;aircraft, stratofortress B-52;A-10 thunderbolt;lamps mark III, SH-60B HELICOP;C-5 support EQUIPMENT;T-37 support EQUIPMENT;T-38 support equipment
- Nominal Thread Diameter
- 0.164 inches
- Width Across Flats
- 0.141 inches minimum and 0.143 inches maximum
- Thread Quantity per Inch
- 32
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 36.0 rockwell C minimum overall and 45.0 rockwell C maximum overall
- Material
- Steel overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416 ty 2 cl 3 fed spec single treatment response overall
- Thread Series Designator
- UNC
- Nondefinitive Spec/STD Data
- 6 type
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.