Model: WC4027-7-12M

Close Tolerance Screw

Special Features:

Item has a dry film lube applied to the shank and the threads only with 100 percent coverage of threads and 80 to 100 percent coverage of the shank length

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.656 inches
Fastener Length
Between 1.641 inches and 1.671 inches
Head Style
Fillister countersunk
Head Diameter
Between 0.612 inches and 0.672 inches
Head Height
0.020 inches
Grip Diameter
0.437 inches
Point Length
0.062 inches
Point Style
Flat
Internal Drive Style
High-torque
Thread Diameter
0.438 inches
Grip Length
1.000 inches
Thready Qty Per Inch (tpi)
20
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Point Chamfer Angle
45.0 of standard range single treatment response
Part Name Assigned By Controlling Agency
Screw-close tolerance, 100 degrees countersunk, reduced head, hi-torque, non-magnetic cres (125 ksi fsu)
Material
Nickel alloy 718
Material Specification
Ams 5662 assn standard single material response
Surface Treatment
Passivate
Surface Treatment Specification
Ams 2700 assn standard single treatment response
Thread Series Designator
Unjf
NSN
5305-01-591-0195
Part Number
WC4027-7-12M
Description
Screw,close Tolerance
CAGE

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 WC4027-7-12M NSN 5305-01-591-0195

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:
A
ESD:
A
MMAC:
FX
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
096640
UFC:
50600
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7508900000
  • SITC: 69975
  • End Use: Finished metal shapes
  • NAICS: 332999
  • USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)

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