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Approvals and Conformities
NSN
5310-00-297-8901
MIL-SPEC#
FF-N-836
Alternate PN#s
911C208-15, A6849-4
Product Attributes
![](/content/flags/flag-of-united-states.png)
United States
Size
1/4"
Shipping Weight
0.02 pounds
ECCN
EAR99
Color Family
Gold
Manufacturer P/N
AN316-8R
Schedule B Code
7318.16.0000
Pack Quantity
10
Series
AN316
Thread
1/2-20
Width
.750
Height
1/4
Color
Gold
Material
Steel
Names are revealing. Air Force-Navy AN316s are check nuts with hex heads; they are made of steel and have a cadmium finish. In particular, the "-8" is the dash number that refers to its size, which is 1/2-20. The "R" next to it can either mean that it has a cross recessed Phillips head or has a right-hand thread. See below for more specs.
- Material: Steel
- Surface Treatment: Cadmium and chromate
- Surface Treatment Document and Classification: QQ-P-416, Type 2, Class 2
- Nut Style: A12 Hexagon
- Nominal Nut Height (inches): .250
- Thread Series: UNF
- Nominal Thread Size (inches): .500
- Thread Quantity (per inch): 20
- Thread Class 3B
- Thread Direction: Right-hand
- Width Across Flats Range (inches): .738 to .752
- Bearing Surface Type: Chamfered
- Nominal Countersink Angle (degree): 110
- Hardness Rating Range (Rockwell): 32 to 80