Model: A51B21643-19

Internally Relieved Body Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.890 inches
Fastener Length
Between 5.853 inches and 5.863 inches
Head Style
Flat chamfer
Head Diameter
1.500 inches
Head Height
0.190 inches
Counterbore Diameter
0.700 inches
Counterbore Depth
0.490 inches
Concentric Hole Diameter
0.375 inches
Thread Diameter
0.750 inches
Thready Qty Per Inch (tpi)
16
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel
Material Specification
G-1013, fscm 26512 mfr ref single material response
Surface Treatment
Chromium grip
Surface Treatment Specification
Qq-c-320 federal specification single treatment response grip
Style Designator
Counterbore unthreaded
Thread Series Designator
Unjf
NSN
5306-00-974-6038
Part Number
A51B21643-19
Description
Bolt,internally Relieved Body
CAGE
61174

An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see bolt, fluid passage.

Part A51B21643-19 NSN 5306-00-974-6038

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06676
FIIG:
A003B0
Concept No.:
App. Key:
BN
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

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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