Model: GB511AE4-97

Close Tolerance Screw

Special Features:

Retaining balls in shank

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.277 inches and 0.328 inches
Fastener Length
Between 6.496 inches and 6.516 inches
Head Style
Crowned hexagon
Head Height
Between 0.126 inches and 0.141 inches
Width Between Flats
Between 0.430 inches and 0.439 inches
Grip Diameter
Between 0.2485 inches and 0.2495 inches
Shank Unthreaded Hole Diameter
0.081 inches first hole
Internal Drive Style
Slot
Thread Diameter
0.250 inches
Grip Length
Between 6.062 inches and 6.078 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
180000 pounds per square inch
Hardness Rating
39.0 rockwell c and 45.0 rockwell c
Hardness Rating
39.0 rockwell c and 45.0 rockwell c
Distance From Head Largest Bearing Surface To Shank Hole Center
6.419 inches first hole
Surface Finish
63.0 microinches bearing surface of head
Surface Finish
63.0 microinches grip
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel comp 8740
Material Specification
Mil-s-6049 military specification single material response
Surface Treatment
Cadmium and chromate
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2 cl 3 federal specification single treatment response
Thread Series Designator
Unjf
NSN
5305-00-151-9830
Part Number
GB511AE4-97
Description
Screw,close Tolerance
CAGE
26512

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 GB511AE4-97 NSN 5305-00-151-9830

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:
CRITL:
X

Packaging & Shipping

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

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: 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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