Model: PBF1421-4-21A

Shear Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.421 inches and 0.471 inches
Fastener Length
Between 1.743 inches and 1.773 inches
Head Style
Spline extended washer
Head Height
Between 0.240 inches and 0.260 inches
Extended Washer Diameter
Between 0.460 inches and 0.470 inches
Extended Washer Thickness
Between 0.026 inches and 0.046 inches
Grip Diameter
Between 0.2485 inches and 0.2495 inches
Head Minor Diameter
Between 0.318 inches and 0.324 inches
Thread Diameter
0.250 inches
Grip Length
Between 1.302 inches and 1.322 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
220000 pounds per square inch
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Material
Nickel alloy 718
Material Specification
Ams 5662 assn standard single material response
Surface Treatment
Aluminum and chromate
Surface Treatment Specification
Mil-c-83488 type 2 cl 3 military specification single treatment response
Thread Series Designator
Unjf
NSN
5306-01-331-3107
Part Number
PBF1421-4-21A
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 PBF1421-4-21A NSN 5306-01-331-3107

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

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: 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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