Model: ST3M553D14-78

Shear Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 1.169 inches and 1.219 inches
Fastener Length
Between 6.054 inches and 6.084 inches
Head Style
Double hexagon w/hole
Head Height
Between 0.798 inches and 0.818 inches
Width Between Flats
Between 0.934 inches and 0.943 inches
Extended Washer Diameter
Between 1.428 inches and 1.438 inches
Extended Washer Thickness
Between 0.188 inches and 0.208 inches
Grip Diameter
Between 0.8730 inches and 0.8740 inches
Shank Unthreaded Hole Diameter
0.093 inches first hole and 0.098 inches first hole
Thread Diameter
0.875 inches
Grip Length
Between 4.865 inches and 4.885 inches
Thready Qty Per Inch (tpi)
14
Min. Tensile Strength (psi)
180000 pounds per square inch
Hardness Rating
39.0 rockwell c and 42.0 rockwell c
Distance From Head Largest Bearing Surface To Shank Hole Center
5.908 inches first hole and 5.938 inches first hole
Material
Steel comp e4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150
Surface Treatment
Cadmium
Surface Treatment Specification
Nas672 assn standard single treatment response
Thread Series Designator
Unjf
Specification Data
76301-st3-553 manufacturers standard
NSN
5306-01-025-4826
Part Number
ST3M553D14-78
Description
Bolt,shear
CAGE

A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.

Part ST3M553D14-78 NSN 5306-01-025-4826

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15903
FIIG:
A003B0
Concept No.:
App. Key:
BX
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:
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:
573
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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