- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.370 inches nominal
- Fastener Length
- 5.167 inches minimum and 5.197 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.125 inches minimum and 0.140 inches maximum
- Width Between Flats
- 0.429 inches minimum and 0.439 inches maximum
- Grip Diameter
- 0.249 inches minimum and 0.250 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 4.802 inches minimum and 4.822 inches maximum
- Features Provided
- Finished head
- Thread Quantity per Inch
- 28
- Hardness Rating
- 36.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Surface Finish
- 125.0 microinches sides of head
- Surface Finish
- 125.0 microinches top of head
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- Steel comp 4340 overall or steel comp 8740 overall
- Material Document and Classification
- MIL-S-5000 uns G43400 mil spec 1ST material response overall or MIL-S-6049 mil spec 2ND material response overall or AMS6322 uns G87400 assn std 2ND material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 2 fed spec all treatment responses overall
- Supplementary Features
- Spec intmd lg 4.812 in. nom /grip -77/; close tol appl
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS6204 professional/industrial association standard
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.