Model: NAS1221-6-14

Machine Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.578 inches
Fastener Length
Between 1.443 inches and 1.463 inches
Head Style
Flat countersunk
Head Diameter
Between 0.703 inches and 0.762 inches
Internal Drive Style
High-torque
Thread Diameter
0.375 inches
Thready Qty Per Inch (tpi)
24
Min. Tensile Strength (psi)
160000 pounds per square inch
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Screw Material
Steel comp 4140 or steel comp 4340 or steel comp 8740
Screw Material Specification
Mil-s-5626 military specification 1st material response or mil-s-8844 military specification 2nd material response or ams6414 assn standard 2nd material response or mil-s-6049 military specification 3rd material response
Screw Surface Treatment
Cadmium or cadmium and chromate
Screw Surface Treatment Specification
Qq-p-416 type 1 cl 3 federal specification 1st treatment response or qq-p-416 type 1 cl 3 federal specification 2nd treatment response
Thread Series Designator
Unjf
NSN
5305-01-353-0694
Part Number
NAS1221-6-14
Description
Screw,machine
CAGE
80205

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

Part NAS1221-6-14 NSN 5305-01-353-0694

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06657
FIIG:
A500D0
Concept No.:
App. Key:
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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