Model: 1-4-20-1-1-2IN

Machine Screw

Properties:

Thread Class
1a
Thread Direction
Right-hand
Thread Length
1.500 inches
Fastener Length
1.500 inches
Head Style
Round
Head Diameter
Between 0.443 inches and 0.472 inches
Head Height
Between 0.160 inches and 0.175 inches
Internal Drive Style
Slot
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Min. Tensile Strength (psi)
60000 pounds per square inch
Screw Material
Steel
Screw Material Specification
Qq-s-634 federal specification single material response or qq-s-637 federal specification single material response or 66 federal standard single material response
Thread Series Designator
Unc
Nondefinitive Specification/std Data
1 type and 1s style
Departure From Cited Designator
As modified by thread class
NSN
5305-00-973-5675
Part Number
1-4-20-1-1-2IN
Description
Screw,machine
CAGE
79428

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 1-4-20-1-1-2IN NSN 5305-00-973-5675

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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