Model: BACB30LU4-43

Close Tolerance Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 2.914 inches and 3.010 inches
Fastener Length
Between 3.097 inches and 3.122 inches
Head Style
Flat countersunk
Head Diameter
Between 0.455 inches and 0.510 inches
Grip Diameter
Between 0.2485 inches and 0.2495 inches
Internal Drive Style
Cross recess type 1
Thread Diameter
0.250 inches
Grip Length
Between 2.677 inches and 2.697 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
125000 pounds per square inch
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches threads
Material
Steel comp e4340 or steel comp 8740
Material Specification
Mil-s-5000 military specification 1st material response or mil-s-6049 military specification 2nd material response or ams 6322 assn standard 2nd material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2 cl 2 federal specification single treatment response
Thread Series Designator
Unjf
NSN
5305-01-251-7552
Part Number
BACB30LU4-43
Description
Screw,close Tolerance
CAGE
81205

Part BACB30LU4-43 NSN 5305-01-251-7552

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:
CRITL:
X

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