Model: 421GC121A

Externally Relieved Body Bolt

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.531 inches
Fastener Length
1.500 inches
Head Style
Hexagon
Head Height
0.312 inches
Width Between Flats
0.687 inches
First Diameter From Head
0.468 inches
Second Diameter From Head
0.375 inches
Third Diameter From Head
0.468 inches
Fourth Diameter From Head
Between 0.284 inches and 0.294 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
0.593 inches
Distance From Largest Bearing Surface Of Head To End Of Second Diameter
0.663 inches
Distance From Largest Bearing Surface Of Head To End Of Third Diameter
0.812 inches
Distance From Largest Bearing Surface Of Head To End Of Fourth Diameter
0.968 inches
Thread Diameter
0.375 inches
Thready Qty Per Inch (tpi)
16
Min. Tensile Strength (psi)
100000 pounds per square inch
Externally Relieved Body Diameter Quantity
4
Material
Steel comp 1137 or steel comp 1139 or steel comp 1140 or steel comp 1141
Thread Series Designator
Unc
NSN
5306-00-974-7501
Part Number
421GC121A
Description
Bolt,externally Relieved Body
CAGE
89619

An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercuts for thread relief). It is no. 10 (0.190 in.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, internal wrenching and thumbscrew. See also screw, externally relieved body.

Part 421GC121A NSN 5306-00-974-7501

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06675
FIIG:
A003B0
Concept No.:
App. Key:
BF
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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