Part Number NAS1221-4-3 Machine Screw
SKU: 5305011067503NAS122143 Machine Screw Datasheet
National aerospace standards part number NAS1221-4-3
Thread Direction:
Right-hand
Thread Length:
Between 0.401 inches and 0.451 inches
Fastener Length:
Between 0.599 inches and 0.629 inches
Head Style:
Flat countersunk
Head Diameter:
0.507 inches
Internal Drive Style:
High-torque
Thread Diameter:
0.250 inches
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
160000 pounds per square inch
Hardness Rating:
Between 36.0 rockwell c and 40.0 rockwell c
Countersink Angle:
Between 99.0 degrees and 101.0 degrees
Screw Material:
Steel comp 4140 or steel comp E4340 or steel comp 8740
Screw Material Specification:
MIL-S-5626 military specification 1ST material response or MIL-S-5000 military specification 2ND material response or MIL-S-6049 military specification 3RD material response
Screw Surface Treatment:
Cadmium and chromate
Screw Surface Treatment Specification:
QQ-P-416 TYPE2 class 2 federal specification single treatment response
Specification Data:
80205-NAS1221 professional/industrial association standard
Manufacturer Cage:
17446
Trade Information:
- Schedule B: 7318152000
- SITC: 69421
- End Use: Iron and steel products, other
- NAICS: 332722
- USDA: 1
Bolts and bolts and their nuts or washers exported in the same shipment
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