Model: NAS1578-4-18

Close Tolerance Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.378 inches and 0.428 inches
Fastener Length
1.528 inches
Head Style
Pan no. 2
Head Diameter
Between 0.477 inches and 0.492 inches
Head Height
Between 0.140 inches and 0.150 inches
Grip Diameter
Between 0.248 inches and 0.249 inches
Internal Drive Style
Offset cruciform (torque set)
End Application
F/a 22 raptor
Thread Diameter
0.250 inches
Grip Length
1.125 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Surface Treatment Specification
Qq-p-416 type 2, class 2 federal specification single treatment response
Thread Series Designator
Unjf
NSN
5305-01-536-2901
Part Number
NAS1578-4-18
Description
Screw,close Tolerance
CAGE
80205

Part NAS1578-4-18 NSN 5305-01-536-2901

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29294
FIIG:
A003B0
Concept No.:
App. Key:
SS
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:
A
ESD:
ESD:
MMAC:
FR
CRITL:
X

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