Model: BACF34L4BT2HS

Socket Head Cap Screw

Special Features:

Three slots 0.040 in. Wide by 0.029 in. Deep along the longitudinal axis and 120 degrees apart, thread to be double lead

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.477 inches and 0.637 inches
Fastener Length
Between 0.767 inches and 0.787 inches
Head Style
Flat countersunk
Head Diameter
Between 0.360 inches and 0.404 inches
Internal Drive Style
Hexagon
Thread Diameter
0.250 inches
Width Across Flats
Between 0.1562 inches and 0.1587 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Surface Finish
32.0 microinches grip
Material
Steel comp 8740 or steel comp 4140
Material Specification
Mil-s-6049 military specification 1st material response or mil-s-5626 military specification 2nd material response
Surface Treatment
Tin
Surface Treatment Specification
Mil-t-10727 ty1 military specification single treatment response
Thread Series Designator
Unf
NSN
5305-01-137-7042
Part Number
BACF34L4BT2HS
Description
Screw,cap,socket Head
CAGE
81205

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part BACF34L4BT2HS NSN 5305-01-137-7042

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16282
FIIG:
A003B0
Concept No.:
App. Key:
SC
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:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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