Model: 123992-4-14A

Close Tolerance Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.403 inches
Fastener Length
Between 1.263 inches and 1.293 inches
Head Style
Flat countersunk
Head Diameter
Between 0.5026 inches and 0.5111 inches
Grip Diameter
Between 0.2485 inches and 0.2495 inches
Internal Drive Style
Offset cruciform (torque set)
End Application
Aircraft, b-2 bomber (atb); support equipment (se), b-2 bomber
Thread Diameter
0.250 inches
Grip Length
Between 0.865 inches and 0.885 inches
Thready Qty Per Inch (tpi)
28
Countersink Angle
Between 129.0 degrees and 131.0 degrees
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Material
Titanium alloy uns r56400
Material Specification
Ams 4928 assn standard single material response or ams 4967 assn standard single material response
Surface Treatment
Aluminum
Surface Treatment Specification
Nas 4006 assn standard single treatment response
Thread Series Designator
Unjf
NSN
5305-01-329-9744
Part Number
123992-4-14A
Description
Screw,close Tolerance
CAGE
80539

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Part 123992-4-14A NSN 5305-01-329-9744

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:
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:
136500
UFC:
68455
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8109900000
  • SITC: 69987
  • End Use: Finished metal shapes
  • NAICS: 331491
  • USDA: 1

Freight Class: Zirconium and articles thereof nesoi

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