Model: HT4028L7-12M

Close Tolerance Screw

Special Features:

Dry film lubricant p.S. 18021 cl 1

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.631 inches and 0.681 inches
Fastener Length
Between 1.391 inches and 1.421 inches
Head Style
Oval countersunk
Head Diameter
Between 0.662 inches and 0.668 inches
Grip Diameter
Between 0.4365 inches and 0.4370 inches
Internal Drive Style
High-torque
Thread Diameter
0.438 inches
Grip Length
Between 0.740 inches and 0.760 inches
Thready Qty Per Inch (tpi)
20
Min. Tensile Strength (psi)
160000 pounds per square inch
Countersink Angle
100.0 degrees
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Surface Finish
32.0 microinches top of head
Material
Titanium alloy
Thread Series Designator
Unjf
Specification Data
76301-st3-466 professional/industrial association standard
NSN
5305-01-049-8191
Part Number
HT4028L7-12M
Description
Screw,close Tolerance
CAGE
17446

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 HT4028L7-12M NSN 5305-01-049-8191

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:
U
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.2000lbs
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:
713
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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