Model: 51218-1-109

Externally Relieved Body Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.820 inches
Fastener Length
2.500 inches
Head Style
Hexagon
Hole Diameter
Between 0.107 inches and 0.112 inches
First Diameter From Head
0.500 inches
Second Diameter From Head
Between 0.405 inches and 0.420 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
1.120 inches
Distance From Largest Bearing Surface Of Head To End Of Second Diameter
1.680 inches
Thread Diameter
0.500 inches
Hole Quantity
1
Hole Type
Drilled
Thready Qty Per Inch (tpi)
13
Hole Configuration Style
Hexagon flats
Externally Relieved Body Diameter Quantity
1
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel
Material Specification
Fed 66 federal standard all material responses or federal 18-8, 300 series federal standard all material responses
Thread Series Designator
Unc
NSN
5305-01-396-9147
Part Number
51218-1-109
Description
Screw,externally Relieved Body
CAGE
98425

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 undercut for thread relief). It is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also bolt, externally relieved body and bolt, internal wrenching.

Part 51218-1-109 NSN 5305-01-396-9147

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01852
FIIG:
A003B0
Concept No.:
App. Key:
SE
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:
096630
UFC:
50590
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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